./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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/cstrpbrk_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 ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:09:40,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:09:40,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:09:40,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:09:40,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:09:40,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:09:40,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:09:40,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:09:40,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:09:40,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:09:40,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:09:40,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:09:40,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:09:40,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:09:40,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:09:40,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:09:40,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:09:40,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:09:40,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:09:40,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:09:40,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:09:40,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:09:40,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:09:40,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:09:40,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:09:40,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:09:40,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:09:40,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:09:40,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:09:40,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:09:40,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:09:40,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:09:40,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:09:40,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:09:40,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:09:40,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:09:40,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:09:40,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:09:40,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:09:40,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:09:40,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:09:40,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:09:40,961 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:09:40,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:09:40,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:09:40,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:09:40,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:09:40,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:09:40,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:09:40,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:09:40,965 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:09:40,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:09:40,966 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:09:40,966 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:09:40,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:09:40,967 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:09:40,968 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:09:40,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:09:40,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:09:40,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:09:40,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:09:40,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:09:40,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:09:40,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:09:40,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 [2023-02-17 08:09:41,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:09:41,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:09:41,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:09:41,191 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:09:41,191 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:09:41,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2023-02-17 08:09:42,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:09:42,347 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:09:42,347 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2023-02-17 08:09:42,355 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f5e0f46/540c71aa50a747d1a052365dab22c7b5/FLAG9dbd9415b [2023-02-17 08:09:42,366 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f5e0f46/540c71aa50a747d1a052365dab22c7b5 [2023-02-17 08:09:42,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:09:42,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:09:42,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:09:42,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:09:42,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:09:42,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcc866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42, skipping insertion in model container [2023-02-17 08:09:42,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:09:42,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:09:42,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:09:42,575 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:09:42,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:09:42,623 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:09:42,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42 WrapperNode [2023-02-17 08:09:42,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:09:42,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:09:42,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:09:42,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:09:42,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,648 INFO L138 Inliner]: procedures = 118, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-02-17 08:09:42,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:09:42,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:09:42,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:09:42,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:09:42,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:09:42,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:09:42,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:09:42,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:09:42,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (1/1) ... [2023-02-17 08:09:42,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:09:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:42,698 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) [2023-02-17 08:09:42,702 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 [2023-02-17 08:09:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 08:09:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2023-02-17 08:09:42,727 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2023-02-17 08:09:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:09:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:09:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:09:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:09:42,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:09:42,809 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:09:42,811 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:09:42,977 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:09:42,981 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:09:42,982 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 08:09:42,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:42 BoogieIcfgContainer [2023-02-17 08:09:42,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:09:42,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:09:42,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:09:42,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:09:42,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:09:42" (1/3) ... [2023-02-17 08:09:42,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2c893e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:09:42, skipping insertion in model container [2023-02-17 08:09:42,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:42" (2/3) ... [2023-02-17 08:09:42,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2c893e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:09:42, skipping insertion in model container [2023-02-17 08:09:42,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:42" (3/3) ... [2023-02-17 08:09:42,989 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2023-02-17 08:09:43,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:09:43,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-02-17 08:09:43,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:09:43,047 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;@157a3334, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:09:43,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-02-17 08:09:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:43,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:43,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:43,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash 536414808, now seen corresponding path program 1 times [2023-02-17 08:09:43,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:43,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402174065] [2023-02-17 08:09:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:43,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402174065] [2023-02-17 08:09:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402174065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:43,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:43,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:09:43,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781694016] [2023-02-17 08:09:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:43,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 08:09:43,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:43,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 08:09:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:09:43,239 INFO L87 Difference]: Start difference. First operand has 66 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:43,264 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-02-17 08:09:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 08:09:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:43,274 INFO L225 Difference]: With dead ends: 66 [2023-02-17 08:09:43,274 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 08:09:43,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:09:43,279 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:43,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 08:09:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-02-17 08:09:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.736842105263158) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-02-17 08:09:43,309 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 8 [2023-02-17 08:09:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:43,311 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-02-17 08:09:43,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-02-17 08:09:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:43,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:43,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:09:43,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 536414498, now seen corresponding path program 1 times [2023-02-17 08:09:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:43,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158601786] [2023-02-17 08:09:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:43,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:43,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158601786] [2023-02-17 08:09:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158601786] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:43,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534733325] [2023-02-17 08:09:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:43,507 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:43,625 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2023-02-17 08:09:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:43,627 INFO L225 Difference]: With dead ends: 73 [2023-02-17 08:09:43,627 INFO L226 Difference]: Without dead ends: 73 [2023-02-17 08:09:43,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:43,630 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:43,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-17 08:09:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2023-02-17 08:09:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-02-17 08:09:43,642 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 8 [2023-02-17 08:09:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:43,642 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-02-17 08:09:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-02-17 08:09:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:43,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:43,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:43,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:09:43,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash 536414499, now seen corresponding path program 1 times [2023-02-17 08:09:43,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:43,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262475098] [2023-02-17 08:09:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:43,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262475098] [2023-02-17 08:09:43,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262475098] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:43,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:43,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:09:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852623595] [2023-02-17 08:09:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:09:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:09:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:43,700 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:43,757 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-02-17 08:09:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:09:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:43,759 INFO L225 Difference]: With dead ends: 72 [2023-02-17 08:09:43,759 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 08:09:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:43,764 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:43,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 164 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 08:09:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-02-17 08:09:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-02-17 08:09:43,772 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 8 [2023-02-17 08:09:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-02-17 08:09:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-02-17 08:09:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:43,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:43,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:43,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:09:43,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 536414552, now seen corresponding path program 1 times [2023-02-17 08:09:43,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:43,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273566208] [2023-02-17 08:09:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:43,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:43,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273566208] [2023-02-17 08:09:43,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273566208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:43,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:43,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307566830] [2023-02-17 08:09:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:43,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:09:43,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:09:43,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:43,813 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:43,831 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-02-17 08:09:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:09:43,832 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:43,832 INFO L225 Difference]: With dead ends: 68 [2023-02-17 08:09:43,832 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 08:09:43,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:43,833 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 182 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 08:09:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2023-02-17 08:09:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-02-17 08:09:43,837 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 8 [2023-02-17 08:09:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:43,838 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-02-17 08:09:43,838 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-02-17 08:09:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:43,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:43,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:09:43,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash 536474081, now seen corresponding path program 1 times [2023-02-17 08:09:43,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:43,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283186771] [2023-02-17 08:09:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:43,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283186771] [2023-02-17 08:09:43,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283186771] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:43,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:43,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:43,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629153615] [2023-02-17 08:09:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:43,898 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:43,988 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-02-17 08:09:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:43,999 INFO L225 Difference]: With dead ends: 74 [2023-02-17 08:09:44,000 INFO L226 Difference]: Without dead ends: 74 [2023-02-17 08:09:44,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:09:44,002 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:44,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 197 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-17 08:09:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2023-02-17 08:09:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2023-02-17 08:09:44,011 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 8 [2023-02-17 08:09:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:44,012 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2023-02-17 08:09:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2023-02-17 08:09:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:09:44,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:44,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:09:44,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 536474134, now seen corresponding path program 1 times [2023-02-17 08:09:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:44,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584773641] [2023-02-17 08:09:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:44,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584773641] [2023-02-17 08:09:44,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584773641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:44,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:44,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634270589] [2023-02-17 08:09:44,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:44,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:44,102 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:44,163 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-02-17 08:09:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:09:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:44,165 INFO L225 Difference]: With dead ends: 72 [2023-02-17 08:09:44,165 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 08:09:44,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:09:44,167 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 20 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:44,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 197 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 08:09:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2023-02-17 08:09:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.627906976744186) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2023-02-17 08:09:44,171 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 8 [2023-02-17 08:09:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:44,171 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2023-02-17 08:09:44,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2023-02-17 08:09:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 08:09:44,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:44,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:44,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:09:44,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting build_nondet_StringErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash -824984668, now seen corresponding path program 1 times [2023-02-17 08:09:44,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:44,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132125072] [2023-02-17 08:09:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132125072] [2023-02-17 08:09:44,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132125072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046605432] [2023-02-17 08:09:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:44,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:09:44,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:09:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 08:09:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:09:44,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-17 08:09:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:09:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046605432] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:44,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:09:44,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 12 [2023-02-17 08:09:44,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398951555] [2023-02-17 08:09:44,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:44,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:44,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:44,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:09:44,464 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:44,516 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-02-17 08:09:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 08:09:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:44,518 INFO L225 Difference]: With dead ends: 66 [2023-02-17 08:09:44,518 INFO L226 Difference]: Without dead ends: 66 [2023-02-17 08:09:44,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:09:44,518 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:44,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 152 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-17 08:09:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-02-17 08:09:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.619047619047619) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-02-17 08:09:44,522 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 12 [2023-02-17 08:09:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:44,522 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-02-17 08:09:44,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-02-17 08:09:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 08:09:44,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:44,523 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:44,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:09:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:44,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash -824984615, now seen corresponding path program 1 times [2023-02-17 08:09:44,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:44,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927031834] [2023-02-17 08:09:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927031834] [2023-02-17 08:09:44,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927031834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455161468] [2023-02-17 08:09:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:44,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:44,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:09:44,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 08:09:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 08:09:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:09:44,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-17 08:09:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:09:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455161468] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:09:45,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:09:45,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-17 08:09:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662779018] [2023-02-17 08:09:45,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:09:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:09:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:09:45,075 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,236 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-02-17 08:09:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:09:45,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 08:09:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,237 INFO L225 Difference]: With dead ends: 75 [2023-02-17 08:09:45,237 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 08:09:45,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:09:45,239 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 37 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 436 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 08:09:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2023-02-17 08:09:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.6) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-02-17 08:09:45,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 12 [2023-02-17 08:09:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,256 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-02-17 08:09:45,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-02-17 08:09:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 08:09:45,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 08:09:45,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 08:09:45,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2141124204, now seen corresponding path program 1 times [2023-02-17 08:09:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585200836] [2023-02-17 08:09:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:09:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 08:09:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:09:45,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585200836] [2023-02-17 08:09:45,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585200836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:45,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129166525] [2023-02-17 08:09:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:45,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:09:45,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 08:09:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 08:09:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:09:45,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 08:09:45,747 WARN L859 $PredicateComparison]: unable to prove that (exists ((build_nondet_String_~nondetString~0.base Int)) (and (exists ((v_ArrVal_56 Int)) (= |c_#valid| (store |c_old(#valid)| build_nondet_String_~nondetString~0.base v_ArrVal_56))) (= 0 (select |c_old(#valid)| build_nondet_String_~nondetString~0.base)))) is different from true [2023-02-17 08:09:45,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:09:45,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 08:09:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-02-17 08:09:45,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:09:45,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129166525] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:45,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:09:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2023-02-17 08:09:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349541262] [2023-02-17 08:09:45,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:09:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:09:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-17 08:09:45,803 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:09:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,906 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-02-17 08:09:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:09:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-02-17 08:09:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,908 INFO L225 Difference]: With dead ends: 60 [2023-02-17 08:09:45,908 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 08:09:45,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=190, Unknown=1, NotChecked=28, Total=272 [2023-02-17 08:09:45,909 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2023-02-17 08:09:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 08:09:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-02-17 08:09:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.525) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:09:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2023-02-17 08:09:45,912 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 23 [2023-02-17 08:09:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,912 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2023-02-17 08:09:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:09:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2023-02-17 08:09:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 08:09:45,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 08:09:46,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:46,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2141124205, now seen corresponding path program 1 times [2023-02-17 08:09:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:46,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196188821] [2023-02-17 08:09:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:46,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:09:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 08:09:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:09:46,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:46,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196188821] [2023-02-17 08:09:46,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196188821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:46,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021954958] [2023-02-17 08:09:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:46,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:46,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:46,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:09:46,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 08:09:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 08:09:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:09:46,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 08:09:46,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 08:09:46,497 WARN L859 $PredicateComparison]: unable to prove that (exists ((build_nondet_String_~nondetString~0.base Int)) (and (exists ((v_ArrVal_86 Int)) (= |c_#length| (store |c_old(#length)| build_nondet_String_~nondetString~0.base v_ArrVal_86))) (= 0 (select |c_old(#valid)| build_nondet_String_~nondetString~0.base)))) is different from true [2023-02-17 08:09:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:09:46,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 08:09:46,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:09:46,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:09:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-02-17 08:09:46,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:09:46,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021954958] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:46,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:09:46,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-02-17 08:09:46,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128954291] [2023-02-17 08:09:46,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:09:46,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 08:09:46,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 08:09:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=445, Unknown=1, NotChecked=42, Total=552 [2023-02-17 08:09:46,599 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 23 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:09:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:47,021 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2023-02-17 08:09:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 08:09:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-02-17 08:09:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:47,022 INFO L225 Difference]: With dead ends: 135 [2023-02-17 08:09:47,022 INFO L226 Difference]: Without dead ends: 135 [2023-02-17 08:09:47,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=1074, Unknown=1, NotChecked=68, Total=1332 [2023-02-17 08:09:47,023 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 226 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:47,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 440 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 550 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2023-02-17 08:09:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-17 08:09:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 85. [2023-02-17 08:09:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 79 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 08:09:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2023-02-17 08:09:47,026 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 23 [2023-02-17 08:09:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:47,031 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2023-02-17 08:09:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:09:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2023-02-17 08:09:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 08:09:47,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:47,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:47,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 08:09:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:47,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-02-17 08:09:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash 288202460, now seen corresponding path program 1 times [2023-02-17 08:09:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:47,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643919460] [2023-02-17 08:09:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:47,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 08:09:47,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 08:09:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 08:09:47,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 08:09:47,265 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 08:09:47,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 23 remaining) [2023-02-17 08:09:47,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-02-17 08:09:47,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-02-17 08:09:47,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2023-02-17 08:09:47,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2023-02-17 08:09:47,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 23 remaining) [2023-02-17 08:09:47,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:09:47,272 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:47,274 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 08:09:47,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 08:09:47 BoogieIcfgContainer [2023-02-17 08:09:47,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 08:09:47,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 08:09:47,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 08:09:47,291 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 08:09:47,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:42" (3/4) ... [2023-02-17 08:09:47,293 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 08:09:47,315 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 08:09:47,316 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 08:09:47,316 INFO L158 Benchmark]: Toolchain (without parser) took 4947.02ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 72.5MB in the beginning and 71.8MB in the end (delta: 690.7kB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,316 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 08:09:47,316 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.62ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 56.3MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,317 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.41ms. Allocated memory is still 117.4MB. Free memory was 56.0MB in the beginning and 54.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 08:09:47,317 INFO L158 Benchmark]: Boogie Preprocessor took 19.72ms. Allocated memory is still 117.4MB. Free memory was 54.3MB in the beginning and 52.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,317 INFO L158 Benchmark]: RCFGBuilder took 314.19ms. Allocated memory is still 117.4MB. Free memory was 52.8MB in the beginning and 82.4MB in the end (delta: -29.6MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,317 INFO L158 Benchmark]: TraceAbstraction took 4306.29ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 82.0MB in the beginning and 73.9MB in the end (delta: 8.1MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,318 INFO L158 Benchmark]: Witness Printer took 24.57ms. Allocated memory is still 153.1MB. Free memory was 73.9MB in the beginning and 71.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.62ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 56.3MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.41ms. Allocated memory is still 117.4MB. Free memory was 56.0MB in the beginning and 54.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.72ms. Allocated memory is still 117.4MB. Free memory was 54.3MB in the beginning and 52.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 314.19ms. Allocated memory is still 117.4MB. Free memory was 52.8MB in the beginning and 82.4MB in the end (delta: -29.6MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * TraceAbstraction took 4306.29ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 82.0MB in the beginning and 73.9MB in the end (delta: 8.1MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Witness Printer took 24.57ms. Allocated memory is still 153.1MB. Free memory was 73.9MB in the beginning and 71.8MB 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: [L546] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L528] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L546] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L546] char* s1 = build_nondet_String(); [L547] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-2:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-2:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-2:0}] [L528] return nondetString; VAL [\result={-2:0}, i=0, length=1, nondetString={-2:0}] [L547] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-2:0}, s1={-1:0}] [L547] char* s2 = build_nondet_String(); [L548] CALL cstrpbrk(s1,s2) [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 VAL [s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] EXPR \read(*sc1) VAL [\read(*sc1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; VAL [\result={0:0}, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L548] RET cstrpbrk(s1,s2) - 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: -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: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: 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 2 procedures, 66 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 464 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 464 mSDsluCounter, 2202 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 124 IncrementalHoareTripleChecker+Unchecked, 1631 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1190 IncrementalHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 571 mSDtfsCounter, 1190 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 4 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=10, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 96 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 196 ConstructedInterpolants, 10 QuantifiedInterpolants, 2544 SizeOfPredicates, 19 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 14/41 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! [2023-02-17 08:09:47,343 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)