java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:48:46,968 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:48:46,970 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:48:46,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:48:46,987 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:48:46,988 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:48:46,989 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:48:46,991 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:48:46,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:48:46,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:48:46,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:48:46,996 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:48:46,997 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:48:46,998 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:48:46,999 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:48:47,002 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:48:47,004 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:48:47,006 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:48:47,008 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:48:47,009 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:48:47,012 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:48:47,017 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:48:47,018 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:48:47,019 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 02:48:47,028 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:48:47,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:48:47,029 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:48:47,029 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:48:47,029 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:48:47,030 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:48:47,030 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:48:47,030 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:48:47,030 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:48:47,030 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:48:47,030 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:48:47,031 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:48:47,032 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:48:47,032 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:48:47,032 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:48:47,032 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:48:47,032 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:48:47,032 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:48:47,033 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:48:47,033 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:48:47,034 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:48:47,035 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:48:47,035 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:48:47,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:48:47,080 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:48:47,085 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:48:47,086 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:48:47,086 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:48:47,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:48:47,264 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:48:47,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:48:47,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:48:47,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:48:47,275 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:48:47,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108cea1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47, skipping insertion in model container [2018-01-21 02:48:47,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,293 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:48:47,331 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:48:47,451 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:48:47,471 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:48:47,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47 WrapperNode [2018-01-21 02:48:47,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:48:47,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:48:47,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:48:47,480 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:48:47,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... [2018-01-21 02:48:47,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:48:47,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:48:47,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:48:47,520 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:48:47,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:48:47,584 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:48:47,584 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:48:47,584 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-21 02:48:47,584 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:48:47,584 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:48:47,584 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-21 02:48:47,585 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:48:47,586 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:48:47,586 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:48:47,781 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:48:47,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:48:47 BoogieIcfgContainer [2018-01-21 02:48:47,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:48:47,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:48:47,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:48:47,784 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:48:47,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:48:47" (1/3) ... [2018-01-21 02:48:47,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721f66c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:48:47, skipping insertion in model container [2018-01-21 02:48:47,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:48:47" (2/3) ... [2018-01-21 02:48:47,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721f66c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:48:47, skipping insertion in model container [2018-01-21 02:48:47,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:48:47" (3/3) ... [2018-01-21 02:48:47,787 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:48:47,794 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:48:47,801 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:48:47,847 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:48:47,848 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:48:47,848 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:48:47,848 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:48:47,848 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:48:47,848 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:48:47,849 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:48:47,849 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:48:47,849 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:48:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 02:48:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:48:47,873 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:47,874 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:48:47,874 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:48:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 69194, now seen corresponding path program 1 times [2018-01-21 02:48:47,883 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:47,929 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:47,929 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:47,929 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:47,929 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:48:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:48:47,983 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:48:47,989 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:48:47,996 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:48:47,996 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:48:47,996 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:48:47,997 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:48:47,997 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:48:47,997 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:48:47,997 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:48:47,997 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrlenErr0EnsuresViolation======== [2018-01-21 02:48:47,997 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:48:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 02:48:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 02:48:47,999 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:47,999 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:48:47,999 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr0EnsuresViolation]=== [2018-01-21 02:48:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1765539224, now seen corresponding path program 1 times [2018-01-21 02:48:48,000 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:48,001 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,001 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:48,001 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,001 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:48:48,030 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:48:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:48:48,070 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:48:48,070 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:48:48,071 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:48:48,072 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:48:48,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:48:48,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,086 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 02:48:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:48:48,189 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 02:48:48,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:48:48,190 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 02:48:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:48:48,197 INFO L225 Difference]: With dead ends: 41 [2018-01-21 02:48:48,197 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:48:48,201 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:48:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:48:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:48:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:48:48,222 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 02:48:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:48:48,222 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:48:48,222 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:48:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:48:48,222 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:48:48,225 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:48:48,225 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:48:48,226 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:48:48,226 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:48:48,226 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:48:48,226 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:48:48,226 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:48:48,226 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:48:48,226 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:48:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 02:48:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 02:48:48,229 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:48,229 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] [2018-01-21 02:48:48,230 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:48:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1402415957, now seen corresponding path program 1 times [2018-01-21 02:48:48,230 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:48,231 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,231 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:48,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,232 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:48:48,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:48:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:48:48,269 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:48:48,269 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:48:48,269 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:48:48,269 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:48:48,270 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:48:48,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,270 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 02:48:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:48:48,274 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 02:48:48,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:48:48,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 02:48:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:48:48,278 INFO L225 Difference]: With dead ends: 41 [2018-01-21 02:48:48,278 INFO L226 Difference]: Without dead ends: 25 [2018-01-21 02:48:48,279 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-21 02:48:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-21 02:48:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-21 02:48:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-01-21 02:48:48,292 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-01-21 02:48:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:48:48,292 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-01-21 02:48:48,293 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:48:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-01-21 02:48:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 02:48:48,294 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:48,294 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] [2018-01-21 02:48:48,294 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:48:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1447957179, now seen corresponding path program 1 times [2018-01-21 02:48:48,294 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:48,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,296 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:48,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,296 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:48:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:48:48,355 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:48:48,361 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:48:48,363 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:48:48,364 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:48:48,365 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:48:48,375 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:48:48,375 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:48:48,375 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:48:48,375 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:48:48,375 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:48:48,375 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:48:48,376 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:48:48,376 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 02:48:48,376 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:48:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 02:48:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 02:48:48,377 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:48,378 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] [2018-01-21 02:48:48,378 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 02:48:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 533302314, now seen corresponding path program 1 times [2018-01-21 02:48:48,378 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:48,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,379 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:48,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,379 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:48:48,389 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:48:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:48:48,404 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:48:48,404 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:48:48,404 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:48:48,405 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:48:48,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:48:48,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,406 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 02:48:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:48:48,409 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 02:48:48,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:48:48,409 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 02:48:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:48:48,410 INFO L225 Difference]: With dead ends: 41 [2018-01-21 02:48:48,411 INFO L226 Difference]: Without dead ends: 23 [2018-01-21 02:48:48,411 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:48:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-21 02:48:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-21 02:48:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-21 02:48:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-01-21 02:48:48,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-01-21 02:48:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:48:48,414 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-01-21 02:48:48,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:48:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-01-21 02:48:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 02:48:48,415 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:48:48,415 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] [2018-01-21 02:48:48,415 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 02:48:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -910224112, now seen corresponding path program 1 times [2018-01-21 02:48:48,416 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:48:48,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,417 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:48:48,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:48:48,417 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:48:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:48:48,439 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:48:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:48:48,617 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:48:48,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 02:48:48,618 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:48:48,618 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:48:48,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:48:48,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:48:48,619 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-01-21 02:48:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:48:48,716 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-01-21 02:48:48,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:48:48,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-21 02:48:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:48:48,717 INFO L225 Difference]: With dead ends: 23 [2018-01-21 02:48:48,718 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:48:48,719 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 02:48:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:48:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:48:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:48:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:48:48,720 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-21 02:48:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:48:48,720 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:48:48,720 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:48:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:48:48,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:48:48,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 02:48:48 BoogieIcfgContainer [2018-01-21 02:48:48,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 02:48:48,725 INFO L168 Benchmark]: Toolchain (without parser) took 1460.00 ms. Allocated memory was 304.1 MB in the beginning and 463.5 MB in the end (delta: 159.4 MB). Free memory was 260.2 MB in the beginning and 402.2 MB in the end (delta: -142.0 MB). Peak memory consumption was 17.4 MB. Max. memory is 5.3 GB. [2018-01-21 02:48:48,726 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 304.1 MB. Free memory is still 266.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:48:48,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.55 ms. Allocated memory is still 304.1 MB. Free memory was 259.3 MB in the beginning and 249.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:48:48,727 INFO L168 Benchmark]: Boogie Preprocessor took 40.01 ms. Allocated memory is still 304.1 MB. Free memory was 249.3 MB in the beginning and 248.3 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 5.3 GB. [2018-01-21 02:48:48,728 INFO L168 Benchmark]: RCFGBuilder took 261.46 ms. Allocated memory is still 304.1 MB. Free memory was 248.3 MB in the beginning and 233.9 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 5.3 GB. [2018-01-21 02:48:48,728 INFO L168 Benchmark]: TraceAbstraction took 941.73 ms. Allocated memory was 304.1 MB in the beginning and 463.5 MB in the end (delta: 159.4 MB). Free memory was 233.9 MB in the beginning and 402.2 MB in the end (delta: -168.3 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:48:48,730 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 304.1 MB. Free memory is still 266.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 209.55 ms. Allocated memory is still 304.1 MB. Free memory was 259.3 MB in the beginning and 249.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.01 ms. Allocated memory is still 304.1 MB. Free memory was 249.3 MB in the beginning and 248.3 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 5.3 GB. * RCFGBuilder took 261.46 ms. Allocated memory is still 304.1 MB. Free memory was 248.3 MB in the beginning and 233.9 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 941.73 ms. Allocated memory was 304.1 MB in the beginning and 463.5 MB in the end (delta: 159.4 MB). Free memory was 233.9 MB in the beginning and 402.2 MB in the end (delta: -168.3 MB). There was no memory consumed. 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, 29 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=29occurred 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: cstrlenErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 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=29occurred 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, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 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: [L548] int length1 = __VERIFIER_nondet_int(); [L549] COND TRUE length1 < 1 [L550] length1 = 1 VAL [length1=1] [L552] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1] [L552] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L553] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L554] CALL, EXPR cstrlen(nondetString1) VAL [s={2:0}] [L542] const char *p = s; VAL [p={2:0}, s={2:0}, s={2:0}] [L543] EXPR, FCALL \read(*p) VAL [\read(*p)=0, p={2:0}, s={2:0}, s={2:0}] [L543] COND FALSE !(*p != '\0') [L545] RET return (int)(p - s); VAL [\result=0, p={2:0}, s={2:0}, s={2:0}] [L554] EXPR cstrlen(nondetString1) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, cstrlen(nondetString1)=0, length1=1, nondetString1={2:0}] [L554] return cstrlen(nondetString1); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 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=29occurred 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, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 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: 547]: 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, 29 locations, 4 error locations. SAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 8 SDslu, 5 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_02-48-48-742.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_02-48-48-742.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_02-48-48-742.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_02-48-48-742.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_02-48-48-742.csv Received shutdown request...