./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2374f3fa60393b4239ba01cfdc738061c6be504efc61284895c5c63f0df9bcb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:29:01,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:29:01,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:29:01,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:29:01,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:29:01,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:29:01,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:29:01,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:29:01,829 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:29:01,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:29:01,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:29:01,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:29:01,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:29:01,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:29:01,852 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:29:01,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:29:01,853 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:29:01,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:29:01,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:29:01,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:29:01,854 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:29:01,858 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:29:01,858 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:29:01,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:29:01,859 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:29:01,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:29:01,860 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:29:01,860 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:29:01,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:29:01,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:29:01,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:29:01,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:29:01,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:29:01,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:29:01,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:29:01,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:29:01,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:29:01,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:29:01,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:29:01,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:29:01,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:29:01,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:29:01,865 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2374f3fa60393b4239ba01cfdc738061c6be504efc61284895c5c63f0df9bcb [2024-10-13 10:29:02,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:29:02,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:29:02,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:29:02,179 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:29:02,180 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:29:02,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2024-10-13 10:29:03,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:29:03,744 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:29:03,746 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2024-10-13 10:29:03,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d19370b/35e8b48f721d4cb381ba31852d50a003/FLAG1a0740382 [2024-10-13 10:29:03,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d19370b/35e8b48f721d4cb381ba31852d50a003 [2024-10-13 10:29:03,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:29:03,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:29:03,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:29:03,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:29:03,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:29:03,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:03,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b425679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03, skipping insertion in model container [2024-10-13 10:29:03,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:03,794 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:29:03,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:29:03,941 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:29:03,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:29:03,965 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:29:03,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03 WrapperNode [2024-10-13 10:29:03,966 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:29:03,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:29:03,967 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:29:03,967 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:29:03,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:03,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:03,990 INFO L138 Inliner]: procedures = 8, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-10-13 10:29:03,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:29:03,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:29:03,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:29:03,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:29:04,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,011 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,026 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [4, 1]. 80 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 2 writes are split as follows [2, 0]. [2024-10-13 10:29:04,027 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,035 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,038 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:29:04,043 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:29:04,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:29:04,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:29:04,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (1/1) ... [2024-10-13 10:29:04,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:29:04,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:04,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 10:29:04,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 10:29:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:29:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:29:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:29:04,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:29:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:29:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:29:04,175 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:29:04,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:29:04,322 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-10-13 10:29:04,322 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:29:04,348 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:29:04,348 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 10:29:04,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:29:04 BoogieIcfgContainer [2024-10-13 10:29:04,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:29:04,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:29:04,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:29:04,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:29:04,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:29:03" (1/3) ... [2024-10-13 10:29:04,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c37de4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:29:04, skipping insertion in model container [2024-10-13 10:29:04,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:03" (2/3) ... [2024-10-13 10:29:04,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c37de4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:29:04, skipping insertion in model container [2024-10-13 10:29:04,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:29:04" (3/3) ... [2024-10-13 10:29:04,355 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2024-10-13 10:29:04,367 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:29:04,367 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-10-13 10:29:04,397 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:29:04,407 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25fb9ee8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:29:04,407 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-13 10:29:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-10-13 10:29:04,415 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:04,416 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-10-13 10:29:04,416 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-13 10:29:04,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2922, now seen corresponding path program 1 times [2024-10-13 10:29:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704125647] [2024-10-13 10:29:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 10:29:04,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 10:29:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 10:29:04,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 10:29:04,594 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 10:29:04,602 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2024-10-13 10:29:04,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2024-10-13 10:29:04,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-10-13 10:29:04,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2024-10-13 10:29:04,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2024-10-13 10:29:04,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-10-13 10:29:04,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-10-13 10:29:04,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2024-10-13 10:29:04,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-10-13 10:29:04,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-10-13 10:29:04,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-10-13 10:29:04,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:29:04,611 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 10:29:04,626 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-13 10:29:04,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:29:04 BoogieIcfgContainer [2024-10-13 10:29:04,630 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-13 10:29:04,632 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-13 10:29:04,632 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-13 10:29:04,632 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-13 10:29:04,632 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:29:04" (3/4) ... [2024-10-13 10:29:04,633 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-13 10:29:04,659 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-13 10:29:04,659 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-13 10:29:04,660 INFO L158 Benchmark]: Toolchain (without parser) took 889.25ms. Allocated memory is still 234.9MB. Free memory was 168.8MB in the beginning and 200.9MB in the end (delta: -32.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:29:04,660 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:29:04,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.03ms. Allocated memory is still 234.9MB. Free memory was 168.5MB in the beginning and 157.2MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-13 10:29:04,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.40ms. Allocated memory is still 234.9MB. Free memory was 156.8MB in the beginning and 155.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:29:04,661 INFO L158 Benchmark]: Boogie Preprocessor took 50.68ms. Allocated memory is still 234.9MB. Free memory was 155.4MB in the beginning and 153.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:29:04,662 INFO L158 Benchmark]: RCFGBuilder took 306.31ms. Allocated memory is still 234.9MB. Free memory was 153.5MB in the beginning and 138.5MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-13 10:29:04,662 INFO L158 Benchmark]: TraceAbstraction took 280.05ms. Allocated memory is still 234.9MB. Free memory was 137.8MB in the beginning and 201.9MB in the end (delta: -64.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:29:04,662 INFO L158 Benchmark]: Witness Printer took 27.67ms. Allocated memory is still 234.9MB. Free memory was 201.9MB in the beginning and 200.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:29:04,664 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.03ms. Allocated memory is still 234.9MB. Free memory was 168.5MB in the beginning and 157.2MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.40ms. Allocated memory is still 234.9MB. Free memory was 156.8MB in the beginning and 155.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.68ms. Allocated memory is still 234.9MB. Free memory was 155.4MB in the beginning and 153.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.31ms. Allocated memory is still 234.9MB. Free memory was 153.5MB in the beginning and 138.5MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 280.05ms. Allocated memory is still 234.9MB. Free memory was 137.8MB in the beginning and 201.9MB in the end (delta: -64.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 27.67ms. Allocated memory is still 234.9MB. Free memory was 201.9MB in the beginning and 200.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L24] char *s1; [L25] char *s2; [L26] int n = __VERIFIER_nondet_int(); [L27] CALL cstrncat(s1, s2, n) [L5] char *s = s1; VAL [n=0, s1={4:2}, s={4:2}] [L7] \read(*s) - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 2 NumberOfCodeBlocks, 2 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-13 10:29:04,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)