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/memsafety/960521-1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:23:14,913 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:23:14,933 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:23:14,947 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:23:14,948 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:23:14,949 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:23:14,950 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:23:14,952 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:23:14,954 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:23:14,955 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:23:14,956 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:23:14,956 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:23:14,957 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:23:14,959 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:23:14,960 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:23:14,962 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:23:14,965 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:23:14,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:23:14,968 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:23:14,969 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:23:14,972 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:23:14,977 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:23:14,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:23:14,977 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 08:23:14,987 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:23:14,987 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:23:14,988 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:23:14,988 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:23:14,989 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:23:14,989 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:23:14,989 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:23:14,989 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:23:14,989 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:23:14,990 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:23:14,990 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:23:14,990 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:23:14,990 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:23:14,991 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:23:14,992 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:23:14,992 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:23:14,992 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:23:14,992 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:23:14,992 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:23:14,993 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:23:14,993 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:23:14,993 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:23:14,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:23:14,993 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:23:14,994 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:23:14,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:23:14,995 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:23:14,995 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:23:14,996 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:23:14,996 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:23:15,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:23:15,043 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:23:15,047 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:23:15,048 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:23:15,049 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:23:15,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i [2018-01-21 08:23:15,212 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:23:15,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:23:15,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:23:15,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:23:15,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:23:15,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83db485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15, skipping insertion in model container [2018-01-21 08:23:15,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,246 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:23:15,285 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:23:15,405 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:23:15,421 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:23:15,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15 WrapperNode [2018-01-21 08:23:15,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:23:15,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:23:15,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:23:15,430 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:23:15,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... [2018-01-21 08:23:15,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:23:15,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:23:15,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:23:15,460 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:23:15,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:23:15,514 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:23:15,514 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:23:15,514 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 08:23:15,515 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:23:15,515 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:23:15,516 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:23:15,516 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 08:23:15,516 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:23:15,516 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:23:15,516 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:23:15,703 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:23:15,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:23:15 BoogieIcfgContainer [2018-01-21 08:23:15,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:23:15,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:23:15,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:23:15,706 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:23:15,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:23:15" (1/3) ... [2018-01-21 08:23:15,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e90363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:23:15, skipping insertion in model container [2018-01-21 08:23:15,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:15" (2/3) ... [2018-01-21 08:23:15,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e90363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:23:15, skipping insertion in model container [2018-01-21 08:23:15,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:23:15" (3/3) ... [2018-01-21 08:23:15,709 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i [2018-01-21 08:23:15,716 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:23:15,721 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:23:15,759 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:15,760 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:15,760 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:15,760 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:15,760 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:15,760 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:15,760 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:15,760 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:23:15,761 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 08:23:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:23:15,791 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:15,792 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:23:15,792 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:23:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 90336, now seen corresponding path program 1 times [2018-01-21 08:23:15,800 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:15,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:15,844 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:15,845 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:15,845 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:15,915 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:23:15,923 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:15,931 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:15,932 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:15,932 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:15,932 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:15,932 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:15,932 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:15,932 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:15,932 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 08:23:15,932 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 08:23:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 08:23:15,934 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:15,935 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:15,935 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 08:23:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 935443697, now seen corresponding path program 1 times [2018-01-21 08:23:15,935 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:15,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:15,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:15,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:15,936 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:15,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,015 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 08:23:16,017 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:16,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:23:16,018 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:16,020 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:23:16,032 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:23:16,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:16,035 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-21 08:23:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:16,132 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 08:23:16,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:23:16,133 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 08:23:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:16,139 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:23:16,139 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:23:16,142 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:23:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:23:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:23:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:23:16,163 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-21 08:23:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:16,163 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:23:16,163 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:23:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:23:16,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:23:16,166 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:16,166 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:16,166 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:16,166 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:16,166 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:16,166 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:16,166 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:16,167 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:23:16,167 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 08:23:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 08:23:16,169 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:16,169 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 08:23:16,169 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:23:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1172106943, now seen corresponding path program 1 times [2018-01-21 08:23:16,169 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:16,170 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,170 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:16,171 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,171 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:16,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,211 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 08:23:16,211 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:16,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:23:16,211 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:16,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:23:16,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:23:16,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:16,213 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-21 08:23:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:16,218 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 08:23:16,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:23:16,218 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-21 08:23:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:16,222 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:23:16,223 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 08:23:16,223 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 08:23:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 08:23:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-21 08:23:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-21 08:23:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-21 08:23:16,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2018-01-21 08:23:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:16,234 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-21 08:23:16,234 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:23:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-21 08:23:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 08:23:16,235 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:16,235 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:16,235 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:23:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash -862637837, now seen corresponding path program 1 times [2018-01-21 08:23:16,235 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:16,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,236 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:16,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,237 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:16,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,322 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 08:23:16,323 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:16,323 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:23:16,323 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:16,324 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:23:16,325 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:23:16,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:23:16,325 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2018-01-21 08:23:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:16,371 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-21 08:23:16,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:23:16,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-21 08:23:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:16,373 INFO L225 Difference]: With dead ends: 58 [2018-01-21 08:23:16,374 INFO L226 Difference]: Without dead ends: 45 [2018-01-21 08:23:16,375 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:23:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-21 08:23:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2018-01-21 08:23:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 08:23:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-21 08:23:16,381 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2018-01-21 08:23:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:16,381 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-21 08:23:16,381 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:23:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-21 08:23:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 08:23:16,382 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:16,382 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:16,382 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:23:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1162981958, now seen corresponding path program 1 times [2018-01-21 08:23:16,383 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:16,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,384 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:16,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,384 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:16,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 08:23:16,475 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:16,475 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:23:16,475 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:16,476 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:23:16,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:23:16,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:23:16,476 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2018-01-21 08:23:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:16,563 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-01-21 08:23:16,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 08:23:16,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-21 08:23:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:16,565 INFO L225 Difference]: With dead ends: 43 [2018-01-21 08:23:16,565 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 08:23:16,566 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:23:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 08:23:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-21 08:23:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-21 08:23:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-01-21 08:23:16,572 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-01-21 08:23:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:16,572 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-01-21 08:23:16,572 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:23:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-01-21 08:23:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 08:23:16,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:16,574 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:16,574 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:23:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1789723842, now seen corresponding path program 1 times [2018-01-21 08:23:16,574 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:16,575 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,575 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:16,575 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,575 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:16,592 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 08:23:16,671 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:16,671 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:23:16,671 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:16,671 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:23:16,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:23:16,672 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:23:16,672 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2018-01-21 08:23:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:16,755 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-21 08:23:16,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:23:16,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-21 08:23:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:16,756 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:23:16,756 INFO L226 Difference]: Without dead ends: 42 [2018-01-21 08:23:16,757 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:23:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-21 08:23:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-01-21 08:23:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 08:23:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-01-21 08:23:16,763 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2018-01-21 08:23:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:16,763 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-01-21 08:23:16,764 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:23:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-01-21 08:23:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 08:23:16,765 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:16,765 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:16,765 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:23:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1424676713, now seen corresponding path program 1 times [2018-01-21 08:23:16,766 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:16,766 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,767 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:16,767 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:16,767 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:16,782 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 08:23:16,842 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:23:16,842 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:23:16,843 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-21 08:23:16,845 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [15], [19], [23], [26], [28], [29], [31], [35], [40], [41], [42], [43], [44], [45], [46], [47], [49], [56], [57], [58], [60], [61], [63], [64], [65], [66], [67], [68] [2018-01-21 08:23:16,896 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:23:16,897 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 08:24:22,344 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 08:24:22,345 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 08:24:22,346 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:24:22,346 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:24:22,346 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 08:24:22,352 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:24:22,352 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:24:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:24:22,390 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:24:22,398 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 08:24:22,398 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 08:24:22,400 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:24:22,401 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:24:22,401 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:24:22,401 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:24:22,401 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:24:22,401 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:24:22,401 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:24:22,401 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:24:22,401 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:24:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 08:24:22,403 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 08:24:22,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:24:22 BoogieIcfgContainer [2018-01-21 08:24:22,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:24:22,405 INFO L168 Benchmark]: Toolchain (without parser) took 67192.96 ms. Allocated memory was 308.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 265.4 MB in the beginning and 407.1 MB in the end (delta: -141.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 5.3 GB. [2018-01-21 08:24:22,407 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 308.3 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:24:22,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.85 ms. Allocated memory is still 308.3 MB. Free memory was 265.4 MB in the beginning and 255.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:24:22,407 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 ms. Allocated memory is still 308.3 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:24:22,408 INFO L168 Benchmark]: RCFGBuilder took 244.11 ms. Allocated memory is still 308.3 MB. Free memory was 253.5 MB in the beginning and 236.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:24:22,408 INFO L168 Benchmark]: TraceAbstraction took 66700.18 ms. Allocated memory was 308.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 236.5 MB in the beginning and 407.1 MB in the end (delta: -170.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 5.3 GB. [2018-01-21 08:24:22,409 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 308.3 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 210.85 ms. Allocated memory is still 308.3 MB. Free memory was 265.4 MB in the beginning and 255.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.03 ms. Allocated memory is still 308.3 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 244.11 ms. Allocated memory is still 308.3 MB. Free memory was 253.5 MB in the beginning and 236.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 66700.18 ms. Allocated memory was 308.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 236.5 MB in the beginning and 407.1 MB in the end (delta: -170.6 MB). Peak memory consumption was 1.2 GB. 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) * 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: [L619] int *a, *b; [L620] int n; VAL [\old(a)=4, \old(a)=7, \old(b)=3, \old(b)=2, \old(n)=5, a={0:0}, b={0:0}, n=0] - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 40 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=40occurred 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: 621]: 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: fooErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 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=40occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 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 - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. TIMEOUT Result, 66.2s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 129 SDtfs, 74 SDslu, 129 SDs, 0 SdLazy, 66 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 65.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 5476 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 629]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 629). Cancelled while IsEmpty was searching accepting run (input had 40 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 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/960521-1_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-24-22-416.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-24-22-416.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-24-22-416.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-24-22-416.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-24-22-416.csv Completed graceful shutdown