./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncpy_unsafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncpy_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 6d9d4ccd50762f6f94227af6be901e1499ea77136c5cda899a027f7324024a3f --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:38:29,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:38:30,030 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:38:30,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:38:30,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:38:30,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:38:30,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:38:30,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:38:30,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:38:30,059 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:38:30,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:38:30,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:38:30,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:38:30,060 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:38:30,060 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:38:30,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:38:30,061 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:38:30,062 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:38:30,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:38:30,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:38:30,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:38:30,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:38:30,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:38:30,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:38:30,063 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 6d9d4ccd50762f6f94227af6be901e1499ea77136c5cda899a027f7324024a3f [2025-03-08 22:38:30,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:38:30,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:38:30,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:38:30,297 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:38:30,297 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:38:30,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncpy_unsafe.c [2025-03-08 22:38:31,412 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e53faba/86d717dc475a4305be6f91ea0c54a76e/FLAG6d8883362 [2025-03-08 22:38:31,631 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:38:31,632 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncpy_unsafe.c [2025-03-08 22:38:31,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e53faba/86d717dc475a4305be6f91ea0c54a76e/FLAG6d8883362 [2025-03-08 22:38:31,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e53faba/86d717dc475a4305be6f91ea0c54a76e [2025-03-08 22:38:31,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:38:31,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:38:31,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:38:31,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:38:31,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:38:31,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58691968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31, skipping insertion in model container [2025-03-08 22:38:31,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,662 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:38:31,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:38:31,757 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:38:31,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:38:31,778 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:38:31,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31 WrapperNode [2025-03-08 22:38:31,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:38:31,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:38:31,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:38:31,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:38:31,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,804 INFO L138 Inliner]: procedures = 8, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2025-03-08 22:38:31,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:38:31,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:38:31,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:38:31,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:38:31,810 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,826 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [1, 2]. 67 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 [0, 2]. [2025-03-08 22:38:31,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,830 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:38:31,838 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:38:31,838 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:38:31,838 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:38:31,839 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (1/1) ... [2025-03-08 22:38:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:38:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:38:31,869 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) [2025-03-08 22:38:31,874 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 [2025-03-08 22:38:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 22:38:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 22:38:31,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:38:31,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:38:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 22:38:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 22:38:31,953 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:38:31,955 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:38:32,074 INFO L? ?]: Removed 39 outVars from TransFormulas that were not future-live. [2025-03-08 22:38:32,075 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:38:32,080 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:38:32,080 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:38:32,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:38:32 BoogieIcfgContainer [2025-03-08 22:38:32,080 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:38:32,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:38:32,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:38:32,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:38:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:38:31" (1/3) ... [2025-03-08 22:38:32,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c817f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:38:32, skipping insertion in model container [2025-03-08 22:38:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:38:31" (2/3) ... [2025-03-08 22:38:32,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c817f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:38:32, skipping insertion in model container [2025-03-08 22:38:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:38:32" (3/3) ... [2025-03-08 22:38:32,086 INFO L128 eAbstractionObserver]: Analyzing ICFG cstrncpy_unsafe.c [2025-03-08 22:38:32,096 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:38:32,097 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrncpy_unsafe.c that has 1 procedures, 21 locations, 1 initial locations, 2 loop locations, and 7 error locations. [2025-03-08 22:38:32,120 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:38:32,127 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;@7a495f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:38:32,128 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-08 22:38:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 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) [2025-03-08 22:38:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-08 22:38:32,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:38:32,134 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-08 22:38:32,134 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2025-03-08 22:38:32,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:38:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1722846, now seen corresponding path program 1 times [2025-03-08 22:38:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:38:32,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398005051] [2025-03-08 22:38:32,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:38:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:38:32,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:38:32,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:38:32,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:38:32,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:38:32,203 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 22:38:32,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:38:32,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:38:32,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:38:32,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:38:32,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 22:38:32,226 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 22:38:32,227 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2025-03-08 22:38:32,228 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2025-03-08 22:38:32,228 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2025-03-08 22:38:32,228 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2025-03-08 22:38:32,228 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2025-03-08 22:38:32,228 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2025-03-08 22:38:32,229 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2025-03-08 22:38:32,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 22:38:32,233 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-08 22:38:32,245 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 22:38:32,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 10:38:32 BoogieIcfgContainer [2025-03-08 22:38:32,249 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 22:38:32,250 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 22:38:32,250 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 22:38:32,250 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 22:38:32,250 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:38:32" (3/4) ... [2025-03-08 22:38:32,251 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-08 22:38:32,286 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 3. [2025-03-08 22:38:32,315 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 22:38:32,315 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 22:38:32,315 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 22:38:32,317 INFO L158 Benchmark]: Toolchain (without parser) took 667.33ms. Allocated memory is still 142.6MB. Free memory was 105.6MB in the beginning and 61.7MB in the end (delta: 43.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-03-08 22:38:32,317 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 201.3MB. Free memory is still 126.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:38:32,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.94ms. Allocated memory is still 142.6MB. Free memory was 105.6MB in the beginning and 95.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 22:38:32,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.26ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 94.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:38:32,319 INFO L158 Benchmark]: Boogie Preprocessor took 32.27ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.6MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 22:38:32,320 INFO L158 Benchmark]: IcfgBuilder took 241.83ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 79.8MB in the end (delta: 12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 22:38:32,320 INFO L158 Benchmark]: TraceAbstraction took 167.21ms. Allocated memory is still 142.6MB. Free memory was 79.8MB in the beginning and 67.4MB in the end (delta: 12.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:38:32,320 INFO L158 Benchmark]: Witness Printer took 65.95ms. Allocated memory is still 142.6MB. Free memory was 67.4MB in the beginning and 62.8MB in the end (delta: 4.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:38:32,322 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 201.3MB. Free memory is still 126.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.94ms. Allocated memory is still 142.6MB. Free memory was 105.6MB in the beginning and 95.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.26ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 94.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.27ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.6MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 241.83ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 79.8MB in the end (delta: 12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 167.21ms. Allocated memory is still 142.6MB. Free memory was 79.8MB in the beginning and 67.4MB in the end (delta: 12.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 65.95ms. Allocated memory is still 142.6MB. Free memory was 67.4MB in the beginning and 62.8MB in the end (delta: 4.6MB). 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: [L27] char *s1; [L28] char *s2; [L29] int n = __VERIFIER_nondet_int(); [L30] CALL cstrncpy(s1, s2, n) [L5] char *dst = s1; [L6] const char *src = s2; [L7] char *us; [L8] int n2; VAL [dst={3:-2}, n=1, s1={3:-2}, src={2:-1}] [L10] COND TRUE n > 0 [L11] n-- [L12] dst++ [L12] src++ VAL [dst={3:-1}, n=0, s1={3:-2}, src={2:0}] [L12] src++ - UnprovableResult [Line: 26]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 24 edges, 7 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, 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=21occurred 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, 4 NumberOfCodeBlocks, 4 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, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-03-08 22:38:32,334 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)