./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/add_last_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/add_last_unsafe.i -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 48fd0d3fe19d1deb0a082df55a1274a55060d743a98a6889cf18bd32ae5a67a0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 04:51:16,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 04:51:16,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 04:51:16,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 04:51:16,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 04:51:16,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 04:51:16,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 04:51:16,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 04:51:16,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 04:51:16,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 04:51:16,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 04:51:16,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 04:51:16,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 04:51:16,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 04:51:16,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 04:51:16,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 04:51:16,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 04:51:16,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 04:51:16,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 04:51:16,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 04:51:16,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 04:51:16,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 04:51:16,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 04:51:16,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 04:51:16,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 04:51:16,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 04:51:16,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 04:51:16,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 04:51:16,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 04:51:16,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 04:51:16,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 04:51:16,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 04:51:16,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 04:51:16,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 04:51:16,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 04:51:16,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 04:51:16,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 04:51:16,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 04:51:16,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 04:51:16,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 04:51:16,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 04:51:16,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 04:51:16,303 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 04:51:16,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 04:51:16,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 04:51:16,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 04:51:16,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 04:51:16,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 04:51:16,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 04:51:16,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 04:51:16,305 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 04:51:16,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 04:51:16,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 04:51:16,307 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 04:51:16,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:51:16,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 04:51:16,308 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 04:51:16,309 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 04:51:16,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 04:51:16,309 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 04:51:16,309 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48fd0d3fe19d1deb0a082df55a1274a55060d743a98a6889cf18bd32ae5a67a0 [2023-02-18 04:51:16,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 04:51:16,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 04:51:16,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 04:51:16,539 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 04:51:16,540 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 04:51:16,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/add_last_unsafe.i [2023-02-18 04:51:17,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 04:51:17,629 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 04:51:17,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/add_last_unsafe.i [2023-02-18 04:51:17,637 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648beeb2b/ca673a348be44281aa1f13c01ab4f951/FLAG4fdb07c3b [2023-02-18 04:51:17,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648beeb2b/ca673a348be44281aa1f13c01ab4f951 [2023-02-18 04:51:17,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 04:51:17,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 04:51:17,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 04:51:17,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 04:51:17,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 04:51:17,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:17,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b70507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17, skipping insertion in model container [2023-02-18 04:51:17,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:17,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 04:51:17,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 04:51:17,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:51:17,935 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 04:51:17,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:51:17,983 INFO L208 MainTranslator]: Completed translation [2023-02-18 04:51:17,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17 WrapperNode [2023-02-18 04:51:17,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 04:51:17,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 04:51:17,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 04:51:17,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 04:51:17,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,021 INFO L138 Inliner]: procedures = 115, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-18 04:51:18,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 04:51:18,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 04:51:18,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 04:51:18,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 04:51:18,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,054 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 04:51:18,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 04:51:18,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 04:51:18,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 04:51:18,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (1/1) ... [2023-02-18 04:51:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:51:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:51:18,083 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) [2023-02-18 04:51:18,086 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 [2023-02-18 04:51:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 04:51:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 04:51:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 04:51:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 04:51:18,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 04:51:18,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 04:51:18,202 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 04:51:18,204 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 04:51:18,316 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 04:51:18,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 04:51:18,320 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 04:51:18,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:51:18 BoogieIcfgContainer [2023-02-18 04:51:18,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 04:51:18,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 04:51:18,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 04:51:18,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 04:51:18,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:51:17" (1/3) ... [2023-02-18 04:51:18,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1dc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:51:18, skipping insertion in model container [2023-02-18 04:51:18,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:51:17" (2/3) ... [2023-02-18 04:51:18,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1dc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:51:18, skipping insertion in model container [2023-02-18 04:51:18,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:51:18" (3/3) ... [2023-02-18 04:51:18,326 INFO L112 eAbstractionObserver]: Analyzing ICFG add_last_unsafe.i [2023-02-18 04:51:18,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 04:51:18,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-02-18 04:51:18,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 04:51:18,368 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57bd7afb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 04:51:18,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-02-18 04:51:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 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) [2023-02-18 04:51:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 04:51:18,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:51:18,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 04:51:18,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-02-18 04:51:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:51:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash 889508760, now seen corresponding path program 1 times [2023-02-18 04:51:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:51:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123914844] [2023-02-18 04:51:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:51:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:51:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:51:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:51:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:51:18,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123914844] [2023-02-18 04:51:18,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123914844] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:51:18,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:51:18,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 04:51:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107030328] [2023-02-18 04:51:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:51:18,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 04:51:18,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:51:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 04:51:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 04:51:18,582 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-18 04:51:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:51:18,625 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-18 04:51:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 04:51:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2023-02-18 04:51:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:51:18,634 INFO L225 Difference]: With dead ends: 33 [2023-02-18 04:51:18,634 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 04:51:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 04:51:18,638 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:51:18,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:51:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 04:51:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 04:51:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 30 states have internal predecessors, (33), 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) [2023-02-18 04:51:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-02-18 04:51:18,688 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2023-02-18 04:51:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:51:18,689 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-02-18 04:51:18,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-18 04:51:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-02-18 04:51:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 04:51:18,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:51:18,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:51:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 04:51:18,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-02-18 04:51:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:51:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968471, now seen corresponding path program 1 times [2023-02-18 04:51:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:51:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749143072] [2023-02-18 04:51:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:51:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:51:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:51:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:51:18,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:51:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749143072] [2023-02-18 04:51:18,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749143072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:51:18,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:51:18,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 04:51:18,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567880634] [2023-02-18 04:51:18,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:51:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 04:51:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:51:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 04:51:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 04:51:18,782 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-18 04:51:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:51:18,812 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-18 04:51:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 04:51:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 7 [2023-02-18 04:51:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:51:18,815 INFO L225 Difference]: With dead ends: 37 [2023-02-18 04:51:18,815 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 04:51:18,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 04:51:18,819 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:51:18,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:51:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 04:51:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-02-18 04:51:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-02-18 04:51:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-02-18 04:51:18,826 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 7 [2023-02-18 04:51:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:51:18,827 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-02-18 04:51:18,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-18 04:51:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-02-18 04:51:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 04:51:18,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:51:18,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:51:18,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 04:51:18,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-02-18 04:51:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:51:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2023-02-18 04:51:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:51:18,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629628465] [2023-02-18 04:51:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:51:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:51:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:51:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:51:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:51:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629628465] [2023-02-18 04:51:18,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629628465] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:51:18,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:51:18,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 04:51:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411499838] [2023-02-18 04:51:18,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:51:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 04:51:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:51:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 04:51:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 04:51:18,903 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-18 04:51:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:51:18,922 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-02-18 04:51:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 04:51:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) Word has length 7 [2023-02-18 04:51:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:51:18,923 INFO L225 Difference]: With dead ends: 29 [2023-02-18 04:51:18,923 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 04:51:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 04:51:18,924 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:51:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:51:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 04:51:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 04:51:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.631578947368421) internal successors, (31), 28 states have internal predecessors, (31), 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) [2023-02-18 04:51:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-18 04:51:18,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2023-02-18 04:51:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:51:18,927 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-18 04:51:18,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-18 04:51:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-18 04:51:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 04:51:18,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:51:18,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:51:18,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 04:51:18,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-02-18 04:51:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:51:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2023-02-18 04:51:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:51:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46378004] [2023-02-18 04:51:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:51:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:51:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 04:51:18,950 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 04:51:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 04:51:18,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 04:51:18,968 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 04:51:18,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-02-18 04:51:18,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-02-18 04:51:18,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-02-18 04:51:18,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-02-18 04:51:18,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-02-18 04:51:18,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-02-18 04:51:18,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-02-18 04:51:18,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-02-18 04:51:18,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-02-18 04:51:18,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-02-18 04:51:18,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-02-18 04:51:18,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-02-18 04:51:18,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-02-18 04:51:18,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 04:51:18,975 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-02-18 04:51:18,977 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 04:51:18,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 04:51:18 BoogieIcfgContainer [2023-02-18 04:51:18,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 04:51:18,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 04:51:18,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 04:51:18,992 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 04:51:18,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:51:18" (3/4) ... [2023-02-18 04:51:18,994 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 04:51:19,026 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 04:51:19,027 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 04:51:19,027 INFO L158 Benchmark]: Toolchain (without parser) took 1378.20ms. Allocated memory was 142.6MB in the beginning and 195.0MB in the end (delta: 52.4MB). Free memory was 104.0MB in the beginning and 143.2MB in the end (delta: -39.2MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2023-02-18 04:51:19,027 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory is still 112.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 04:51:19,028 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.68ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 88.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-02-18 04:51:19,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.03ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 04:51:19,028 INFO L158 Benchmark]: Boogie Preprocessor took 35.35ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 84.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 04:51:19,029 INFO L158 Benchmark]: RCFGBuilder took 262.48ms. Allocated memory is still 142.6MB. Free memory was 84.7MB in the beginning and 73.3MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 04:51:19,029 INFO L158 Benchmark]: TraceAbstraction took 669.48ms. Allocated memory was 142.6MB in the beginning and 195.0MB in the end (delta: 52.4MB). Free memory was 72.6MB in the beginning and 145.3MB in the end (delta: -72.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 04:51:19,029 INFO L158 Benchmark]: Witness Printer took 34.77ms. Allocated memory is still 195.0MB. Free memory was 145.3MB in the beginning and 143.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 04:51:19,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory is still 112.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.68ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 88.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.03ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.35ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 84.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 262.48ms. Allocated memory is still 142.6MB. Free memory was 84.7MB in the beginning and 73.3MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 669.48ms. Allocated memory was 142.6MB in the beginning and 195.0MB in the end (delta: 52.4MB). Free memory was 72.6MB in the beginning and 145.3MB in the end (delta: -72.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 34.77ms. Allocated memory is still 195.0MB. Free memory was 145.3MB in the beginning and 143.2MB in the end (delta: 2.1MB). 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: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int length = __VERIFIER_nondet_int(); [L515] COND TRUE length < 1 [L515] length = 1 VAL [length=1] [L516] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={2:0}, arr={2:0}, length=1] [L517] COND FALSE !(!arr) [L518] int *a = arr; [L520] int k = 0; VAL [__builtin_alloca (length)={2:0}, a={2:0}, arr={2:0}, k=0, length=1] [L520] COND TRUE k < length [L522] arr[k] = __VERIFIER_nondet_int() - 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: -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: 512]: 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, 33 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 121 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 121 mSDsluCounter, 87 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53 IncrementalHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 63 mSDtfsCounter, 53 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! [2023-02-18 04:51:19,059 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)