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_imprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncat_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:28:52,149 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:28:52,151 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:28:52,166 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:28:52,166 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:28:52,167 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:28:52,168 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:28:52,170 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:28:52,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:28:52,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:28:52,174 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:28:52,174 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:28:52,175 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:28:52,176 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:28:52,177 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:28:52,180 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:28:52,182 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:28:52,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:28:52,186 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:28:52,187 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:28:52,189 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:28:52,195 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_imprecise.epf [2018-01-21 00:28:52,206 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:28:52,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:28:52,207 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:28:52,207 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:28:52,207 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:28:52,207 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:28:52,207 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:28:52,208 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:28:52,208 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:28:52,208 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:28:52,209 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:28:52,210 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:28:52,210 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:28:52,210 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:28:52,210 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:28:52,210 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:28:52,211 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:28:52,211 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:28:52,211 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:28:52,211 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:28:52,211 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:28:52,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:28:52,212 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:28:52,212 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:28:52,212 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:28:52,212 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:28:52,212 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:28:52,213 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:28:52,213 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:28:52,213 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:28:52,213 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:28:52,213 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:28:52,214 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:28:52,214 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:28:52,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:28:52,262 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:28:52,266 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:28:52,268 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:28:52,268 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:28:52,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncat_unsafe_false-valid-deref.i [2018-01-21 00:28:52,392 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:28:52,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:28:52,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:28:52,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:28:52,406 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:28:52,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270957f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52, skipping insertion in model container [2018-01-21 00:28:52,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,427 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:28:52,448 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:28:52,570 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:28:52,584 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:28:52,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52 WrapperNode [2018-01-21 00:28:52,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:28:52,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:28:52,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:28:52,591 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:28:52,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (1/1) ... [2018-01-21 00:28:52,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:28:52,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:28:52,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:28:52,626 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:28:52,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (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 00:28:52,683 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:28:52,683 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:28:52,683 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-21 00:28:52,683 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:28:52,683 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:28:52,684 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:28:52,854 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:28:52,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:28:52 BoogieIcfgContainer [2018-01-21 00:28:52,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:28:52,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:28:52,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:28:52,857 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:28:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:28:52" (1/3) ... [2018-01-21 00:28:52,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e49e4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:28:52, skipping insertion in model container [2018-01-21 00:28:52,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:28:52" (2/3) ... [2018-01-21 00:28:52,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e49e4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:28:52, skipping insertion in model container [2018-01-21 00:28:52,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:28:52" (3/3) ... [2018-01-21 00:28:52,860 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe_false-valid-deref.i [2018-01-21 00:28:52,867 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:28:52,874 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 00:28:52,917 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:28:52,917 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:28:52,938 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:28:52,938 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:28:52,938 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:28:52,938 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:28:52,939 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:28:52,939 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:28:52,939 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:28:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 00:28:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:28:52,962 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:28:52,963 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:28:52,963 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:28:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash 87453, now seen corresponding path program 1 times [2018-01-21 00:28:52,972 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:28:53,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,017 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:28:53,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,017 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:28:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:28:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:28:53,079 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:28:53,085 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:28:53,090 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:28:53,090 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:28:53,091 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:28:53,091 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:28:53,091 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:28:53,091 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:28:53,091 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:28:53,091 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:28:53,091 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:28:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 00:28:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:28:53,093 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:28:53,093 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:28:53,093 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:28:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1566947830, now seen corresponding path program 1 times [2018-01-21 00:28:53,094 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:28:53,095 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,095 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:28:53,095 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,095 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:28:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:28:53,121 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:28:53,155 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 00:28:53,158 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:28:53,158 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:28:53,158 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:28:53,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:28:53,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:28:53,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:28:53,179 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 00:28:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:28:53,199 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2018-01-21 00:28:53,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:28:53,200 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 00:28:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:28:53,210 INFO L225 Difference]: With dead ends: 52 [2018-01-21 00:28:53,210 INFO L226 Difference]: Without dead ends: 29 [2018-01-21 00:28:53,213 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 00:28:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-21 00:28:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-21 00:28:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-21 00:28:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-01-21 00:28:53,311 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2018-01-21 00:28:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:28:53,312 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-01-21 00:28:53,312 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:28:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-01-21 00:28:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 00:28:53,313 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:28:53,313 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 00:28:53,313 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:28:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1029885663, now seen corresponding path program 1 times [2018-01-21 00:28:53,313 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:28:53,314 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,314 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:28:53,314 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,314 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:28:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:28:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:28:53,355 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:28:53,363 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:28:53,367 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:28:53,368 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:28:53,369 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:28:53,384 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:28:53,384 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:28:53,384 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:28:53,384 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:28:53,384 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:28:53,385 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:28:53,385 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:28:53,385 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:28:53,385 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:28:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 00:28:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 00:28:53,388 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:28:53,388 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:28:53,388 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:28:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1938032112, now seen corresponding path program 1 times [2018-01-21 00:28:53,388 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:28:53,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,389 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:28:53,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,390 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:28:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:28:53,401 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:28:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:28:53,415 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:28:53,415 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:28:53,415 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:28:53,415 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:28:53,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:28:53,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:28:53,416 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 00:28:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:28:53,420 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2018-01-21 00:28:53,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:28:53,421 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 00:28:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:28:53,421 INFO L225 Difference]: With dead ends: 52 [2018-01-21 00:28:53,421 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:28:53,422 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 00:28:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:28:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:28:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:28:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:28:53,423 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-01-21 00:28:53,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:28:53,423 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:28:53,424 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:28:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:28:53,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:28:53,426 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:28:53,426 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:28:53,426 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:28:53,427 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:28:53,427 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:28:53,427 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:28:53,427 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:28:53,427 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-21 00:28:53,427 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:28:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-01-21 00:28:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-21 00:28:53,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:28:53,430 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:28:53,430 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-21 00:28:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1541674444, now seen corresponding path program 1 times [2018-01-21 00:28:53,430 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:28:53,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,431 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:28:53,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:28:53,431 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:28:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:28:53,441 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:28:53,453 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 00:28:53,453 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:28:53,453 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:28:53,453 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:28:53,453 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:28:53,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:28:53,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:28:53,454 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-01-21 00:28:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:28:53,457 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2018-01-21 00:28:53,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:28:53,457 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-01-21 00:28:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:28:53,457 INFO L225 Difference]: With dead ends: 52 [2018-01-21 00:28:53,457 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:28:53,458 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 00:28:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:28:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:28:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:28:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:28:53,458 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2018-01-21 00:28:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:28:53,459 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:28:53,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:28:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:28:53,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:28:53,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:28:53 BoogieIcfgContainer [2018-01-21 00:28:53,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:28:53,461 INFO L168 Benchmark]: Toolchain (without parser) took 1069.21 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 262.8 MB in the beginning and 417.7 MB in the end (delta: -155.0 MB). Peak memory consumption was 2.9 MB. Max. memory is 5.3 GB. [2018-01-21 00:28:53,463 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 266.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:28:53,463 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.21 ms. Allocated memory is still 302.0 MB. Free memory was 262.8 MB in the beginning and 252.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:28:53,463 INFO L168 Benchmark]: Boogie Preprocessor took 34.29 ms. Allocated memory is still 302.0 MB. Free memory is still 252.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:28:53,464 INFO L168 Benchmark]: RCFGBuilder took 229.45 ms. Allocated memory is still 302.0 MB. Free memory was 252.8 MB in the beginning and 235.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 5.3 GB. [2018-01-21 00:28:53,464 INFO L168 Benchmark]: TraceAbstraction took 605.47 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 235.9 MB in the beginning and 417.7 MB in the end (delta: -181.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:28:53,466 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 266.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 192.21 ms. Allocated memory is still 302.0 MB. Free memory was 262.8 MB in the beginning and 252.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.29 ms. Allocated memory is still 302.0 MB. Free memory is still 252.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 229.45 ms. Allocated memory is still 302.0 MB. Free memory was 252.8 MB in the beginning and 235.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 605.47 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 235.9 MB in the beginning and 417.7 MB in the end (delta: -181.9 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, 33 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) VAL [\old(n)=0, s1={4:3}, s2={5:1}] [L4] char *s = s1; VAL [\old(n)=0, n=0, s={4:3}, s1={4:3}, s1={4:3}, s2={5:1}, s2={5:1}] [L5] EXPR, FCALL \read(*s) VAL [\old(n)=0, \read(*s)=0, n=0, s={4:3}, s1={4:3}, s1={4:3}, s2={5:1}, s2={5:1}] [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' VAL [\old(n)=0, n=0, n != 0 && (*s = *s2++) != '\0'=0, s={4:3}, s1={4:3}, s1={4:3}, s2={5:1}, s2={5:1}] [L7] COND FALSE !(n != 0 && (*s = *s2++) != '\0') [L11] EXPR, FCALL \read(*s) VAL [\old(n)=0, \read(*s)=0, n=0, s={4:3}, s1={4:3}, s1={4:3}, s2={5:1}, s2={5:1}] [L11] COND FALSE !(*s != '\0') [L13] RET return s1; VAL [\old(n)=0, \result={4:3}, n=0, s={4:3}, s1={4:3}, s1={4:3}, s2={5:1}, s2={5:1}] [L19] cstrncat(s1, s2, n) VAL [cstrncat(s1, s2, n)={4:3}, n=0, s1={4:3}, s2={5:1}] [L20] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 33 locations, 4 error locations. UNSAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 15]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 33 locations, 4 error locations. SAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 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: 2]: 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: cstrncatErr0EnsuresViolation CFG has 4 procedures, 33 locations, 4 error locations. SAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-28-53-475.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-28-53-475.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-28-53-475.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-28-53-475.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_00-28-53-475.csv Received shutdown request...