./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 ff03de63 Calling Ultimate with: /usr/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 ../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.graphml --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 0.2.2-dev-ff03de6 [2021-12-21 17:59:30,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 17:59:30,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 17:59:30,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 17:59:30,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 17:59:30,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 17:59:30,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 17:59:30,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 17:59:30,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 17:59:30,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 17:59:30,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 17:59:30,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 17:59:30,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 17:59:30,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 17:59:30,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 17:59:30,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 17:59:30,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 17:59:30,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 17:59:30,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 17:59:30,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 17:59:30,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 17:59:30,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 17:59:30,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 17:59:30,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 17:59:30,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 17:59:30,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 17:59:30,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 17:59:30,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 17:59:30,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 17:59:30,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 17:59:30,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 17:59:30,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 17:59:30,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 17:59:30,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 17:59:30,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 17:59:30,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 17:59:30,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 17:59:30,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 17:59:30,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 17:59:30,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 17:59:30,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 17:59:30,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 17:59:30,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 17:59:30,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 17:59:30,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 17:59:30,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 17:59:30,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 17:59:30,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 17:59:30,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 17:59:30,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 17:59:30,115 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 17:59:30,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 17:59:30,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 17:59:30,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 17:59:30,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 17:59:30,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 17:59:30,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 17:59:30,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 17:59:30,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 17:59:30,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 17:59:30,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 17:59:30,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:59:30,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 17:59:30,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 17:59:30,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 17:59:30,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 17:59:30,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 17:59:30,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d9d4ccd50762f6f94227af6be901e1499ea77136c5cda899a027f7324024a3f [2021-12-21 17:59:30,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 17:59:30,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 17:59:30,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 17:59:30,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 17:59:30,321 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 17:59:30,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncpy_unsafe.c [2021-12-21 17:59:30,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a7d36b5/4aec0d543e50400daa017c615437a95e/FLAGb02517026 [2021-12-21 17:59:30,710 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 17:59:30,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncpy_unsafe.c [2021-12-21 17:59:30,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a7d36b5/4aec0d543e50400daa017c615437a95e/FLAGb02517026 [2021-12-21 17:59:30,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a7d36b5/4aec0d543e50400daa017c615437a95e [2021-12-21 17:59:30,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 17:59:30,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 17:59:30,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 17:59:30,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 17:59:30,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 17:59:30,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d2cf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30, skipping insertion in model container [2021-12-21 17:59:30,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 17:59:30,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 17:59:30,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:59:30,910 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 17:59:30,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:59:30,930 INFO L208 MainTranslator]: Completed translation [2021-12-21 17:59:30,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30 WrapperNode [2021-12-21 17:59:30,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 17:59:30,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 17:59:30,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 17:59:30,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 17:59:30,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,957 INFO L137 Inliner]: procedures = 8, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-12-21 17:59:30,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 17:59:30,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 17:59:30,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 17:59:30,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 17:59:30,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 17:59:30,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 17:59:30,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 17:59:30,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 17:59:30,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (1/1) ... [2021-12-21 17:59:30,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:59:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:31,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 17:59:31,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 17:59:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 17:59:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 17:59:31,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 17:59:31,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 17:59:31,078 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 17:59:31,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 17:59:31,207 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 17:59:31,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 17:59:31,211 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 17:59:31,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:59:31 BoogieIcfgContainer [2021-12-21 17:59:31,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 17:59:31,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 17:59:31,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 17:59:31,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 17:59:31,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:59:30" (1/3) ... [2021-12-21 17:59:31,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653015c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:59:31, skipping insertion in model container [2021-12-21 17:59:31,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:59:30" (2/3) ... [2021-12-21 17:59:31,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653015c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:59:31, skipping insertion in model container [2021-12-21 17:59:31,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:59:31" (3/3) ... [2021-12-21 17:59:31,218 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncpy_unsafe.c [2021-12-21 17:59:31,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 17:59:31,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-21 17:59:31,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 17:59:31,266 INFO L339 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 17:59:31,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-21 17:59:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-12-21 17:59:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 17:59:31,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:31,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 17:59:31,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 17:59:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2021-12-21 17:59:31,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935964125] [2021-12-21 17:59:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:31,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 17:59:31,394 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 17:59:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 17:59:31,435 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 17:59:31,437 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 17:59:31,437 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-12-21 17:59:31,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-12-21 17:59:31,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-12-21 17:59:31,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-12-21 17:59:31,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-12-21 17:59:31,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-12-21 17:59:31,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-12-21 17:59:31,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 17:59:31,443 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-21 17:59:31,445 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 17:59:31,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 05:59:31 BoogieIcfgContainer [2021-12-21 17:59:31,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 17:59:31,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 17:59:31,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 17:59:31,464 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 17:59:31,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:59:31" (3/4) ... [2021-12-21 17:59:31,467 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 17:59:31,500 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 17:59:31,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 17:59:31,502 INFO L158 Benchmark]: Toolchain (without parser) took 773.70ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 39.4MB in the beginning and 62.9MB in the end (delta: -23.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 17:59:31,502 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 17:59:31,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.47ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 39.3MB in the beginning and 68.9MB in the end (delta: -29.7MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2021-12-21 17:59:31,503 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.14ms. Allocated memory is still 92.3MB. Free memory was 68.7MB in the beginning and 67.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 17:59:31,503 INFO L158 Benchmark]: Boogie Preprocessor took 18.09ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 17:59:31,504 INFO L158 Benchmark]: RCFGBuilder took 235.77ms. Allocated memory is still 92.3MB. Free memory was 66.2MB in the beginning and 55.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 17:59:31,504 INFO L158 Benchmark]: TraceAbstraction took 248.48ms. Allocated memory is still 92.3MB. Free memory was 55.4MB in the beginning and 64.7MB in the end (delta: -9.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 17:59:31,504 INFO L158 Benchmark]: Witness Printer took 36.82ms. Allocated memory is still 92.3MB. Free memory was 64.7MB in the beginning and 62.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 17:59:31,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.47ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 39.3MB in the beginning and 68.9MB in the end (delta: -29.7MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.14ms. Allocated memory is still 92.3MB. Free memory was 68.7MB in the beginning and 67.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.09ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 235.77ms. Allocated memory is still 92.3MB. Free memory was 66.2MB in the beginning and 55.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 248.48ms. Allocated memory is still 92.3MB. Free memory was 55.4MB in the beginning and 64.7MB in the end (delta: -9.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 36.82ms. Allocated memory is still 92.3MB. Free memory was 64.7MB in the beginning and 62.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. 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: 12]: 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 [\old(n)=1, dst={3:-1}, n=1, s1={3:-1}, s1={3:-1}, s2={2:-2}, s2={2:-2}, src={2:-2}] [L10] COND TRUE n > 0 [L11] n-- [L12] dst++ [L12] src++ - UnprovableResult [Line: 12]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 26]: 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, 22 locations, 7 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, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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 RESULT: Ultimate proved your program to be incorrect! [2021-12-21 17:59:31,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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)