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_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:17:59,008 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:17:59,009 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:17:59,024 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:17:59,025 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:17:59,026 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:17:59,027 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:17:59,028 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:17:59,030 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:17:59,031 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:17:59,032 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:17:59,032 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:17:59,033 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:17:59,035 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:17:59,036 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:17:59,038 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:17:59,040 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:17:59,043 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:17:59,044 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:17:59,045 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:17:59,048 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:17:59,053 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:17:59,054 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:17:59,054 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_preciseopt.epf [2018-01-21 08:17:59,063 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:17:59,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:17:59,064 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:17:59,064 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:17:59,064 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:17:59,064 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:17:59,064 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:17:59,064 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:17:59,065 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:17:59,065 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:17:59,065 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:17:59,065 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:17:59,065 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:17:59,066 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:17:59,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:17:59,067 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:17:59,067 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:17:59,067 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:17:59,067 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:17:59,068 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:17:59,068 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:17:59,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:17:59,069 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:17:59,069 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:17:59,069 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:17:59,070 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:17:59,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:17:59,113 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:17:59,116 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:17:59,118 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:17:59,118 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:17:59,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:59,276 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:17:59,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:17:59,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:59,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:17:59,286 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:17:59,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408feb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59, skipping insertion in model container [2018-01-21 08:17:59,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,304 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:59,344 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:59,469 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:59,487 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:59,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59 WrapperNode [2018-01-21 08:17:59,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:59,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:17:59,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:17:59,496 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:17:59,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (1/1) ... [2018-01-21 08:17:59,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:17:59,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:17:59,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:17:59,528 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:17:59,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (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 08:17:59,575 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:17:59,576 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:17:59,576 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrnlen [2018-01-21 08:17:59,576 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:17:59,576 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:17:59,576 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:17:59,576 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure cstrnlen [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:17:59,577 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:17:59,578 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:17:59,758 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:17:59,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:59 BoogieIcfgContainer [2018-01-21 08:17:59,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:17:59,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:17:59,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:17:59,761 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:17:59,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:17:59" (1/3) ... [2018-01-21 08:17:59,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cbdc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:59, skipping insertion in model container [2018-01-21 08:17:59,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:59" (2/3) ... [2018-01-21 08:17:59,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cbdc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:59, skipping insertion in model container [2018-01-21 08:17:59,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:59" (3/3) ... [2018-01-21 08:17:59,765 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:59,772 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:17:59,779 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:17:59,818 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:59,818 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:59,818 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:59,818 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:59,818 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:59,818 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:59,818 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:59,819 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:17:59,819 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 08:17:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:17:59,845 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:59,846 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:17:59,846 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:17:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash 82648, now seen corresponding path program 1 times [2018-01-21 08:17:59,855 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:59,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:59,896 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:59,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:59,896 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:59,949 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:17:59,955 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:59,961 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:59,961 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:59,961 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:59,961 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:59,961 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:59,962 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:59,962 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:59,962 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrnlenErr0EnsuresViolation======== [2018-01-21 08:17:59,962 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 08:17:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-21 08:17:59,964 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:59,964 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:59,964 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr0EnsuresViolation]=== [2018-01-21 08:17:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 553872978, now seen corresponding path program 1 times [2018-01-21 08:17:59,965 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:59,966 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:59,966 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:59,966 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:59,967 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:00,003 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:00,041 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 08:18:00,042 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:00,043 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:18:00,043 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:00,045 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:18:00,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:18:00,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:18:00,059 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 08:18:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:00,162 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-21 08:18:00,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:18:00,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-01-21 08:18:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:00,170 INFO L225 Difference]: With dead ends: 45 [2018-01-21 08:18:00,170 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:18:00,174 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 08:18:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:18:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:18:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:18:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:18:00,195 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-01-21 08:18:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:00,195 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:18:00,195 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:18:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:18:00,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:18:00,198 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:18:00,198 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:18:00,198 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:18:00,198 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:18:00,198 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:18:00,199 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:18:00,199 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:18:00,199 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:18:00,199 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:18:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 08:18:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 08:18:00,202 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:00,202 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:18:00,202 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:18:00,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1554819341, now seen corresponding path program 1 times [2018-01-21 08:18:00,203 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:00,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,204 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:00,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,205 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:00,223 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:00,245 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 08:18:00,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:00,246 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:18:00,246 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:00,246 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:18:00,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:18:00,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:18:00,247 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 08:18:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:00,251 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-21 08:18:00,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:18:00,251 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 08:18:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:00,255 INFO L225 Difference]: With dead ends: 45 [2018-01-21 08:18:00,255 INFO L226 Difference]: Without dead ends: 29 [2018-01-21 08:18:00,255 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 08:18:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-21 08:18:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-21 08:18:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-21 08:18:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-01-21 08:18:00,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2018-01-21 08:18:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:00,266 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-01-21 08:18:00,267 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:18:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-01-21 08:18:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 08:18:00,268 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:00,268 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] [2018-01-21 08:18:00,268 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:18:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -637658528, now seen corresponding path program 1 times [2018-01-21 08:18:00,268 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:00,269 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,269 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:00,269 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,269 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:00,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:00,483 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 08:18:00,483 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:00,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:18:00,484 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:00,486 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:18:00,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:18:00,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:18:00,487 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2018-01-21 08:18:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:00,624 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2018-01-21 08:18:00,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:18:00,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-21 08:18:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:00,628 INFO L225 Difference]: With dead ends: 68 [2018-01-21 08:18:00,628 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 08:18:00,629 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:18:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 08:18:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2018-01-21 08:18:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-21 08:18:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2018-01-21 08:18:00,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 25 [2018-01-21 08:18:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:00,645 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2018-01-21 08:18:00,645 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:18:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2018-01-21 08:18:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 08:18:00,647 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:00,647 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] [2018-01-21 08:18:00,647 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:18:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1663164062, now seen corresponding path program 1 times [2018-01-21 08:18:00,647 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:00,648 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,648 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:00,648 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:00,648 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:00,669 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:00,787 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 08:18:00,787 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:00,787 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 08:18:00,788 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:00,788 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 08:18:00,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 08:18:00,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:18:00,789 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2018-01-21 08:18:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:01,021 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2018-01-21 08:18:01,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 08:18:01,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-01-21 08:18:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:01,023 INFO L225 Difference]: With dead ends: 63 [2018-01-21 08:18:01,023 INFO L226 Difference]: Without dead ends: 42 [2018-01-21 08:18:01,023 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-21 08:18:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-21 08:18:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-01-21 08:18:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-21 08:18:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-01-21 08:18:01,029 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2018-01-21 08:18:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:01,029 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-01-21 08:18:01,029 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 08:18:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-01-21 08:18:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 08:18:01,030 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:01,031 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] [2018-01-21 08:18:01,031 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:18:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2048961725, now seen corresponding path program 1 times [2018-01-21 08:18:01,031 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:01,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,032 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:01,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,033 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:18:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:18:01,075 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:18:01,081 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:18:01,084 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:18:01,085 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:18:01,086 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:18:01,095 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:18:01,095 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:18:01,095 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:18:01,095 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:18:01,095 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:18:01,095 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:18:01,095 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:18:01,095 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:18:01,096 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:18:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 08:18:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:18:01,097 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:01,097 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] [2018-01-21 08:18:01,097 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:18:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1267654414, now seen corresponding path program 1 times [2018-01-21 08:18:01,098 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:01,098 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,098 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:01,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,099 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:01,107 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:01,119 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 08:18:01,119 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:01,119 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:18:01,120 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:01,120 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:18:01,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:18:01,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:18:01,121 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 08:18:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:01,124 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-21 08:18:01,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:18:01,124 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 08:18:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:01,125 INFO L225 Difference]: With dead ends: 45 [2018-01-21 08:18:01,125 INFO L226 Difference]: Without dead ends: 27 [2018-01-21 08:18:01,126 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 08:18:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-21 08:18:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-21 08:18:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-21 08:18:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-01-21 08:18:01,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2018-01-21 08:18:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:01,131 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-01-21 08:18:01,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:18:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-01-21 08:18:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 08:18:01,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:01,132 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:18:01,132 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:18:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1560438341, now seen corresponding path program 1 times [2018-01-21 08:18:01,132 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:01,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,134 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:01,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,134 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:01,146 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:01,245 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 08:18:01,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:01,245 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:18:01,245 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:01,245 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:18:01,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:18:01,246 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:18:01,246 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2018-01-21 08:18:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:01,378 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2018-01-21 08:18:01,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:18:01,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-21 08:18:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:01,380 INFO L225 Difference]: With dead ends: 64 [2018-01-21 08:18:01,380 INFO L226 Difference]: Without dead ends: 59 [2018-01-21 08:18:01,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:18:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-21 08:18:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-01-21 08:18:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-21 08:18:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-01-21 08:18:01,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2018-01-21 08:18:01,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:01,390 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-01-21 08:18:01,390 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:18:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-01-21 08:18:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 08:18:01,391 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:18:01,391 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:18:01,391 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:18:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1713460601, now seen corresponding path program 1 times [2018-01-21 08:18:01,392 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:18:01,393 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,393 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:18:01,393 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:18:01,393 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:18:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:18:01,410 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:18:01,490 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 08:18:01,490 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:18:01,490 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:18:01,490 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:18:01,491 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:18:01,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:18:01,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 08:18:01,491 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 4 states. [2018-01-21 08:18:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:18:01,584 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2018-01-21 08:18:01,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:18:01,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-01-21 08:18:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:18:01,585 INFO L225 Difference]: With dead ends: 42 [2018-01-21 08:18:01,585 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:18:01,586 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 08:18:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:18:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:18:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:18:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:18:01,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-01-21 08:18:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:18:01,587 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:18:01,587 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:18:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:18:01,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:18:01,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:18:01 BoogieIcfgContainer [2018-01-21 08:18:01,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:18:01,593 INFO L168 Benchmark]: Toolchain (without parser) took 2316.53 ms. Allocated memory was 302.5 MB in the beginning and 460.3 MB in the end (delta: 157.8 MB). Free memory was 260.7 MB in the beginning and 320.1 MB in the end (delta: -59.5 MB). Peak memory consumption was 98.3 MB. Max. memory is 5.3 GB. [2018-01-21 08:18:01,595 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 302.5 MB. Free memory is still 266.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:18:01,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.09 ms. Allocated memory is still 302.5 MB. Free memory was 259.7 MB in the beginning and 249.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 08:18:01,595 INFO L168 Benchmark]: Boogie Preprocessor took 31.71 ms. Allocated memory is still 302.5 MB. Free memory was 249.6 MB in the beginning and 248.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 5.3 GB. [2018-01-21 08:18:01,596 INFO L168 Benchmark]: RCFGBuilder took 230.98 ms. Allocated memory is still 302.5 MB. Free memory was 248.6 MB in the beginning and 232.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:18:01,596 INFO L168 Benchmark]: TraceAbstraction took 1833.27 ms. Allocated memory was 302.5 MB in the beginning and 460.3 MB in the end (delta: 157.8 MB). Free memory was 232.6 MB in the beginning and 320.1 MB in the end (delta: -87.5 MB). Peak memory consumption was 70.3 MB. Max. memory is 5.3 GB. [2018-01-21 08:18:01,598 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 302.5 MB. Free memory is still 266.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 215.09 ms. Allocated memory is still 302.5 MB. Free memory was 259.7 MB in the beginning and 249.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.71 ms. Allocated memory is still 302.5 MB. Free memory was 249.6 MB in the beginning and 248.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 5.3 GB. * RCFGBuilder took 230.98 ms. Allocated memory is still 302.5 MB. Free memory was 248.6 MB in the beginning and 232.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1833.27 ms. Allocated memory was 302.5 MB in the beginning and 460.3 MB in the end (delta: 157.8 MB). Free memory was 232.6 MB in the beginning and 320.1 MB in the end (delta: -87.5 MB). Peak memory consumption was 70.3 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) - 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, 33 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=33occurred 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 - 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: cstrnlenErr0EnsuresViolation CFG has 4 procedures, 33 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 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=33occurred 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, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L549] int length1 = __VERIFIER_nondet_int(); [L550] int n = __VERIFIER_nondet_int(); [L551] COND TRUE length1 < 1 [L552] length1 = 1 VAL [length1=1, n=0] [L554] COND TRUE n < 1 [L555] n = 1 VAL [length1=1, n=1] [L557] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, n=1] [L557] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, n=1, nondetString1={3:0}] [L558] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, n=1, nondetString1={3:0}] [L559] CALL, EXPR cstrnlen(nondetString1,n) VAL [\old(maxlen)=1, str={3:0}] [L543] const char *cp; [L544] cp = str VAL [\old(maxlen)=1, cp={3:0}, maxlen=1, str={3:0}, str={3:0}] [L544] maxlen != 0 && *cp != '\0' VAL [\old(maxlen)=1, cp={3:0}, maxlen=1, maxlen != 0 && *cp != '\0'=1, str={3:0}, str={3:0}] [L544] EXPR, FCALL \read(*cp) VAL [\old(maxlen)=1, \read(*cp)=0, cp={3:0}, maxlen=1, maxlen != 0 && *cp != '\0'=1, str={3:0}, str={3:0}] [L544] maxlen != 0 && *cp != '\0' VAL [\old(maxlen)=1, \read(*cp)=0, cp={3:0}, maxlen=1, maxlen != 0 && *cp != '\0'=0, str={3:0}, str={3:0}] [L544] COND FALSE !(maxlen != 0 && *cp != '\0') [L546] RET return (size_t)(cp - str); VAL [\old(maxlen)=1, \result=0, cp={3:0}, maxlen=1, str={3:0}, str={3:0}] [L559] EXPR cstrnlen(nondetString1,n) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, cstrnlen(nondetString1,n)=0, length1=1, n=1, nondetString1={3:0}] [L559] return cstrnlen(nondetString1,n); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 33 locations, 4 error locations. UNSAFE Result, 0.8s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 102 SDtfs, 86 SDslu, 179 SDs, 0 SdLazy, 67 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=2, 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, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 5236 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: 548]: 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, 33 locations, 4 error locations. SAFE Result, 0.4s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 93 SDtfs, 55 SDslu, 87 SDs, 0 SdLazy, 58 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, 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, 17 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 4382 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-18-01-609.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-18-01-609.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-18-01-609.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-18-01-609.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrnlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-18-01-609.csv Received shutdown request...