java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:51:41,938 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:51:41,939 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:51:41,954 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:51:41,954 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:51:41,955 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:51:41,957 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:51:41,958 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:51:41,961 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:51:41,962 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:51:41,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:51:41,963 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:51:41,963 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:51:41,964 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:51:41,965 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:51:41,967 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:51:41,969 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:51:41,972 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:51:41,973 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:51:41,974 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:51:41,977 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:51:41,982 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:51:41,983 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:51:41,983 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 02:51:41,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:51:41,994 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:51:41,994 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:51:41,995 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:51:41,995 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:51:41,995 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:51:41,995 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:51:41,995 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:51:41,996 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:51:41,996 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:51:41,997 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:51:41,997 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:51:41,997 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:51:41,997 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:51:41,997 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:51:41,998 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:51:41,998 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:51:41,998 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:51:41,998 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:51:41,998 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:51:41,999 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:51:41,999 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:51:41,999 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:51:41,999 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:51:41,999 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:51:42,000 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:51:42,000 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:51:42,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:51:42,000 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:51:42,000 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:51:42,001 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:51:42,001 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:51:42,001 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:51:42,001 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:51:42,001 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:51:42,002 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:51:42,002 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:51:42,002 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:51:42,003 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:51:42,003 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:51:42,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:51:42,054 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:51:42,058 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:51:42,060 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:51:42,061 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:51:42,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:51:42,239 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:51:42,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:51:42,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:51:42,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:51:42,251 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:51:42,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31112d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42, skipping insertion in model container [2018-01-21 02:51:42,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,273 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:51:42,328 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:51:42,461 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:51:42,480 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:51:42,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42 WrapperNode [2018-01-21 02:51:42,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:51:42,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:51:42,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:51:42,498 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:51:42,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... [2018-01-21 02:51:42,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:51:42,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:51:42,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:51:42,545 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:51:42,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:51:42,620 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:51:42,620 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:51:42,620 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-21 02:51:42,620 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:51:42,621 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:51:42,622 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-21 02:51:42,622 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:51:42,622 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:51:42,622 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:51:42,841 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:51:42,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:51:42 BoogieIcfgContainer [2018-01-21 02:51:42,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:51:42,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:51:42,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:51:42,845 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:51:42,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:51:42" (1/3) ... [2018-01-21 02:51:42,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255bd2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:51:42, skipping insertion in model container [2018-01-21 02:51:42,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:42" (2/3) ... [2018-01-21 02:51:42,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255bd2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:51:42, skipping insertion in model container [2018-01-21 02:51:42,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:51:42" (3/3) ... [2018-01-21 02:51:42,848 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:51:42,856 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:51:42,862 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:51:42,937 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:42,937 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:42,937 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:42,938 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:42,938 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:42,938 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:42,938 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:42,938 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:51:42,939 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-01-21 02:51:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:51:42,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:42,971 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:51:42,971 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:51:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash 70155, now seen corresponding path program 1 times [2018-01-21 02:51:42,980 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,047 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,047 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,048 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,048 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:43,122 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:51:43,131 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:43,140 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:43,140 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:43,140 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:43,140 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:43,140 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:43,141 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:43,141 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:43,141 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrlenErr0EnsuresViolation======== [2018-01-21 02:51:43,141 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-01-21 02:51:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 02:51:43,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:43,144 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:43,145 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr0EnsuresViolation]=== [2018-01-21 02:51:43,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1269956342, now seen corresponding path program 1 times [2018-01-21 02:51:43,145 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,147 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,147 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:43,191 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:43,241 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:43,241 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:51:43,241 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:43,244 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:51:43,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:51:43,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,263 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2018-01-21 02:51:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:43,383 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-01-21 02:51:43,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:51:43,384 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 02:51:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:43,394 INFO L225 Difference]: With dead ends: 42 [2018-01-21 02:51:43,395 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:51:43,398 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:51:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:51:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:51:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:51:43,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 02:51:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:43,429 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:51:43,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:51:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:51:43,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:51:43,432 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:43,432 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:43,433 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:43,433 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:43,433 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:43,433 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:43,433 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:43,433 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:51:43,433 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-01-21 02:51:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 02:51:43,436 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:43,436 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 02:51:43,436 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:51:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash -140806636, now seen corresponding path program 1 times [2018-01-21 02:51:43,437 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,438 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,438 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:43,454 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:43,475 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:43,475 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:51:43,475 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:43,476 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:51:43,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:51:43,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,476 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2018-01-21 02:51:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:43,480 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-01-21 02:51:43,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:51:43,480 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 02:51:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:43,484 INFO L225 Difference]: With dead ends: 42 [2018-01-21 02:51:43,484 INFO L226 Difference]: Without dead ends: 26 [2018-01-21 02:51:43,485 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-21 02:51:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-21 02:51:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-21 02:51:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-01-21 02:51:43,493 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2018-01-21 02:51:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:43,493 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-01-21 02:51:43,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:51:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-01-21 02:51:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 02:51:43,494 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:43,494 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 02:51:43,494 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:51:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash -262357829, now seen corresponding path program 1 times [2018-01-21 02:51:43,495 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,496 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:43,545 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:51:43,550 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:43,552 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:43,553 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:43,553 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:43,560 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:43,560 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:43,560 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:43,560 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:43,560 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:43,560 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:43,561 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:43,561 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 02:51:43,561 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-01-21 02:51:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 02:51:43,562 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:43,562 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 02:51:43,562 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 02:51:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1823608183, now seen corresponding path program 1 times [2018-01-21 02:51:43,563 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,564 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,564 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:43,575 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:43,588 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:43,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:51:43,588 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:43,589 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:51:43,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:51:43,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,590 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2018-01-21 02:51:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:43,592 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-01-21 02:51:43,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:51:43,592 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 02:51:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:43,593 INFO L225 Difference]: With dead ends: 42 [2018-01-21 02:51:43,593 INFO L226 Difference]: Without dead ends: 24 [2018-01-21 02:51:43,594 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-21 02:51:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-21 02:51:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-21 02:51:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-01-21 02:51:43,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-01-21 02:51:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:43,597 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-01-21 02:51:43,597 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:51:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-01-21 02:51:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 02:51:43,597 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:43,598 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 02:51:43,598 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 02:51:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2127644944, now seen corresponding path program 1 times [2018-01-21 02:51:43,598 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:43,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,599 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:43,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:43,599 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:43,614 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:43,720 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:43,720 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 02:51:43,720 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:43,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:51:43,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:51:43,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:51:43,721 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2018-01-21 02:51:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:43,809 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-01-21 02:51:43,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:51:43,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-21 02:51:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:43,810 INFO L225 Difference]: With dead ends: 24 [2018-01-21 02:51:43,810 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:51:43,811 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 02:51:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:51:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:51:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:51:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:51:43,812 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-21 02:51:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:43,812 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:51:43,812 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:51:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:51:43,813 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:51:43,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 02:51:43 BoogieIcfgContainer [2018-01-21 02:51:43,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 02:51:43,816 INFO L168 Benchmark]: Toolchain (without parser) took 1576.37 ms. Allocated memory was 306.7 MB in the beginning and 440.9 MB in the end (delta: 134.2 MB). Free memory was 265.5 MB in the beginning and 379.9 MB in the end (delta: -114.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:43,818 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 306.7 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:51:43,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 306.7 MB. Free memory was 265.5 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 02:51:43,818 INFO L168 Benchmark]: Boogie Preprocessor took 46.55 ms. Allocated memory is still 306.7 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 02:51:43,819 INFO L168 Benchmark]: RCFGBuilder took 297.19 ms. Allocated memory is still 306.7 MB. Free memory was 253.5 MB in the beginning and 240.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:43,819 INFO L168 Benchmark]: TraceAbstraction took 972.68 ms. Allocated memory was 306.7 MB in the beginning and 440.9 MB in the end (delta: 134.2 MB). Free memory was 238.4 MB in the beginning and 379.9 MB in the end (delta: -141.5 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:51:43,821 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 306.7 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 306.7 MB. Free memory was 265.5 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 46.55 ms. Allocated memory is still 306.7 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 297.19 ms. Allocated memory is still 306.7 MB. Free memory was 253.5 MB in the beginning and 240.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 972.68 ms. Allocated memory was 306.7 MB in the beginning and 440.9 MB in the end (delta: 134.2 MB). Free memory was 238.4 MB in the beginning and 379.9 MB in the end (delta: -141.5 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, 30 locations, 4 error locations. UNSAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 30 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 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=30occurred 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: [L549] int length1 = __VERIFIER_nondet_int(); [L550] COND TRUE length1 < 1 [L551] length1 = 1 VAL [length1=1] [L553] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1] [L553] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, nondetString1={3:0}] [L554] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, nondetString1={3:0}] [L555] CALL, EXPR cstrlen(nondetString1) VAL [str={3:0}] [L543] const char *s; [L544] s = str VAL [s={3:0}, str={3:0}, str={3:0}] [L544] EXPR, FCALL \read(*s) VAL [\read(*s)=0, s={3:0}, str={3:0}, str={3:0}] [L544] COND FALSE !(*s) [L546] RET return (s - str); VAL [\result=0, s={3:0}, str={3:0}, str={3:0}] [L555] EXPR cstrlen(nondetString1) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, cstrlen(nondetString1)=0, length1=1, nondetString1={3:0}] [L555] return cstrlen(nondetString1); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 30 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 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=30occurred 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: 548]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 30 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 9 SDslu, 5 SDs, 0 SdLazy, 25 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=30occurred 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/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_02-51-43-830.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_02-51-43-830.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_02-51-43-830.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_02-51-43-830.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_02-51-43-830.csv Received shutdown request...