./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a31fd051 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/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d1b4f878f349b01f3590c559873a0592fcefb7dcee6776147b1461d6eff5d64d --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 13:52:11,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:52:11,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:52:11,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:52:11,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:52:11,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:52:11,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:52:11,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:52:11,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:52:11,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:52:11,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:52:11,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:52:11,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:52:11,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:52:11,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:52:11,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:52:11,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:52:11,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:52:11,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:52:11,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:52:11,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:52:11,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:52:11,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:52:11,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:52:11,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:52:11,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:52:11,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:52:11,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:52:11,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:52:11,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:52:11,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:52:11,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:52:11,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:52:11,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:52:11,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:52:11,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:52:11,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:52:11,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:52:11,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:52:11,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:52:11,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:52:11,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-15 13:52:11,772 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:52:11,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:52:11,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:52:11,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:52:11,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:52:11,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:52:11,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:52:11,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:52:11,774 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:52:11,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:52:11,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 13:52:11,776 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-15 13:52:11,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 13:52:11,776 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:52:11,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 13:52:11,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:52:11,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:52:11,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:52:11,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:52:11,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:52:11,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:52:11,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 13:52:11,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:52:11,778 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:52:11,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1b4f878f349b01f3590c559873a0592fcefb7dcee6776147b1461d6eff5d64d [2023-02-15 13:52:12,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:52:12,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:52:12,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:52:12,048 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:52:12,049 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:52:12,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2023-02-15 13:52:13,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:52:13,363 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:52:13,364 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2023-02-15 13:52:13,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d374314fe/48542320bc194efa9bf938e78944b020/FLAG2055d334e [2023-02-15 13:52:13,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d374314fe/48542320bc194efa9bf938e78944b020 [2023-02-15 13:52:13,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:52:13,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:52:13,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:52:13,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:52:13,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:52:13,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b937907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13, skipping insertion in model container [2023-02-15 13:52:13,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:52:13,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:52:13,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:52:13,556 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:52:13,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:52:13,578 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:52:13,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13 WrapperNode [2023-02-15 13:52:13,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:52:13,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:52:13,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:52:13,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:52:13,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,602 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2023-02-15 13:52:13,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:52:13,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:52:13,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:52:13,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:52:13,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,616 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:52:13,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:52:13,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:52:13,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:52:13,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (1/1) ... [2023-02-15 13:52:13,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:52:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:52:13,652 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) [2023-02-15 13:52:13,681 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 [2023-02-15 13:52:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-02-15 13:52:13,695 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-02-15 13:52:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:52:13,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:52:13,741 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:52:13,742 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:52:13,856 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:52:13,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:52:13,864 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 13:52:13,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:52:13 BoogieIcfgContainer [2023-02-15 13:52:13,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:52:13,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:52:13,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:52:13,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:52:13,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:52:13" (1/3) ... [2023-02-15 13:52:13,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e338a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:52:13, skipping insertion in model container [2023-02-15 13:52:13,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:52:13" (2/3) ... [2023-02-15 13:52:13,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e338a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:52:13, skipping insertion in model container [2023-02-15 13:52:13,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:52:13" (3/3) ... [2023-02-15 13:52:13,875 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2a.c [2023-02-15 13:52:13,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:52:13,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 13:52:13,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:52:13,945 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2db1592e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:52:13,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 13:52:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:52:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:52:13,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:52:13,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:52:13,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 13:52:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:52:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1303862826, now seen corresponding path program 1 times [2023-02-15 13:52:13,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:52:13,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140404600] [2023-02-15 13:52:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:52:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:52:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 13:52:14,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 13:52:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 13:52:14,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 13:52:14,073 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 13:52:14,074 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-02-15 13:52:14,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-02-15 13:52:14,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:52:14,081 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-02-15 13:52:14,085 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 13:52:14,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:52:14 BoogieIcfgContainer [2023-02-15 13:52:14,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 13:52:14,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 13:52:14,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 13:52:14,105 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 13:52:14,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:52:13" (3/4) ... [2023-02-15 13:52:14,107 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 13:52:14,144 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 13:52:14,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 13:52:14,146 INFO L158 Benchmark]: Toolchain (without parser) took 757.67ms. Allocated memory is still 142.6MB. Free memory was 96.3MB in the beginning and 60.2MB in the end (delta: 36.2MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,147 INFO L158 Benchmark]: CDTParser took 0.63ms. Allocated memory is still 142.6MB. Free memory is still 114.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 13:52:14,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.80ms. Allocated memory is still 142.6MB. Free memory was 95.8MB in the beginning and 85.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,148 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.34ms. Allocated memory is still 142.6MB. Free memory was 85.9MB in the beginning and 84.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 13:52:14,148 INFO L158 Benchmark]: Boogie Preprocessor took 14.35ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 83.8MB in the end (delta: 992.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,149 INFO L158 Benchmark]: RCFGBuilder took 247.98ms. Allocated memory is still 142.6MB. Free memory was 83.8MB in the beginning and 74.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,149 INFO L158 Benchmark]: TraceAbstraction took 234.14ms. Allocated memory is still 142.6MB. Free memory was 74.3MB in the beginning and 61.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,149 INFO L158 Benchmark]: Witness Printer took 40.73ms. Allocated memory is still 142.6MB. Free memory was 61.7MB in the beginning and 60.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 13:52:14,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63ms. Allocated memory is still 142.6MB. Free memory is still 114.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.80ms. Allocated memory is still 142.6MB. Free memory was 95.8MB in the beginning and 85.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.34ms. Allocated memory is still 142.6MB. Free memory was 85.9MB in the beginning and 84.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.35ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 83.8MB in the end (delta: 992.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 247.98ms. Allocated memory is still 142.6MB. Free memory was 83.8MB in the beginning and 74.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 234.14ms. Allocated memory is still 142.6MB. Free memory was 74.3MB in the beginning and 61.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 40.73ms. Allocated memory is still 142.6MB. Free memory was 61.7MB in the beginning and 60.2MB in the end (delta: 1.6MB). 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: 15]: integer overflow possible integer overflow possible We found a FailurePath: [L19] int x = __VERIFIER_nondet_int(); [L20] CALL g(x) VAL [\old(x)=-2147483648] [L12] COND FALSE !(x == 0) VAL [\old(x)=-2147483648, x=-2147483648] [L15] x - 1 VAL [\old(x)=-2147483648, x=-2147483648] - UnprovableResult [Line: 15]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-15 13:52:14,169 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(OVERFLOW)