./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 35987657 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_1a-1.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 c86bd149cf8dcec56d0b62aefda03e866c4e374070f20ea19c317a4fa78bf8c1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:29:37,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:29:37,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:29:37,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:29:37,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:29:37,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:29:37,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:29:37,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:29:37,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:29:37,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:29:37,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:29:37,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:29:37,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:29:37,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:29:37,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:29:37,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:29:37,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:29:37,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:29:37,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:29:37,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:29:37,357 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:29:37,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:29:37,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:29:37,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:29:37,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:29:37,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:29:37,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:29:37,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:29:37,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:29:37,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:29:37,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:29:37,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:29:37,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:29:37,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:29:37,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:29:37,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:29:37,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:29:37,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:29:37,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:29:37,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:29:37,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:29:37,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:29:37,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-22 00:29:37,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:29:37,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:29:37,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:29:37,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:29:37,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:29:37,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:29:37,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:29:37,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:29:37,406 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:29:37,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:29:37,407 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:29:37,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:29:37,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:29:37,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 00:29:37,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 00:29:37,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:29:37,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:29:37,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:29:37,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:29:37,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 00:29:37,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86bd149cf8dcec56d0b62aefda03e866c4e374070f20ea19c317a4fa78bf8c1 [2022-07-22 00:29:37,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:29:37,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:29:37,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:29:37,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:29:37,714 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:29:37,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2022-07-22 00:29:37,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8509ecac1/ef9abb61290941678f759145499d56b8/FLAG1b6852a74 [2022-07-22 00:29:38,104 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:29:38,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2022-07-22 00:29:38,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8509ecac1/ef9abb61290941678f759145499d56b8/FLAG1b6852a74 [2022-07-22 00:29:38,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8509ecac1/ef9abb61290941678f759145499d56b8 [2022-07-22 00:29:38,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:29:38,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:29:38,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:29:38,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:29:38,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:29:38,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6eecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38, skipping insertion in model container [2022-07-22 00:29:38,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:29:38,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:29:38,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:29:38,666 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:29:38,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:29:38,695 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:29:38,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38 WrapperNode [2022-07-22 00:29:38,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:29:38,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:29:38,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:29:38,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:29:38,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,724 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2022-07-22 00:29:38,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:29:38,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:29:38,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:29:38,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:29:38,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:29:38,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:29:38,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:29:38,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:29:38,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (1/1) ... [2022-07-22 00:29:38,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:29:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:29:38,801 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) [2022-07-22 00:29:38,811 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 [2022-07-22 00:29:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-07-22 00:29:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-07-22 00:29:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-07-22 00:29:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-07-22 00:29:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:29:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:29:38,874 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:29:38,875 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:29:39,037 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:29:39,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:29:39,044 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 00:29:39,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:29:39 BoogieIcfgContainer [2022-07-22 00:29:39,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:29:39,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:29:39,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:29:39,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:29:39,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:29:38" (1/3) ... [2022-07-22 00:29:39,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f37a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:29:39, skipping insertion in model container [2022-07-22 00:29:39,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:29:38" (2/3) ... [2022-07-22 00:29:39,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f37a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:29:39, skipping insertion in model container [2022-07-22 00:29:39,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:29:39" (3/3) ... [2022-07-22 00:29:39,068 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1a-1.c [2022-07-22 00:29:39,098 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:29:39,098 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-07-22 00:29:39,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:29:39,221 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5071a38b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65980b13 [2022-07-22 00:29:39,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-22 00:29:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 00:29:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 00:29:39,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:29:39,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 00:29:39,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-07-22 00:29:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:29:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2132374368, now seen corresponding path program 1 times [2022-07-22 00:29:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:29:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544142889] [2022-07-22 00:29:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:29:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:29:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 00:29:39,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 00:29:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 00:29:39,355 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 00:29:39,358 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 00:29:39,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2022-07-22 00:29:39,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2022-07-22 00:29:39,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2022-07-22 00:29:39,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2022-07-22 00:29:39,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2022-07-22 00:29:39,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2022-07-22 00:29:39,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2022-07-22 00:29:39,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2022-07-22 00:29:39,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2022-07-22 00:29:39,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2022-07-22 00:29:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 00:29:39,367 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 00:29:39,371 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 00:29:39,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 12:29:39 BoogieIcfgContainer [2022-07-22 00:29:39,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 00:29:39,387 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 00:29:39,387 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 00:29:39,387 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 00:29:39,388 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:29:39" (3/4) ... [2022-07-22 00:29:39,389 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 00:29:39,415 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 00:29:39,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 00:29:39,417 INFO L158 Benchmark]: Toolchain (without parser) took 879.19ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 35.3MB in the beginning and 42.2MB in the end (delta: -7.0MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-07-22 00:29:39,418 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.4MB in the end (delta: 52.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:29:39,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.98ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 41.3MB in the end (delta: -6.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 00:29:39,422 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.22ms. Allocated memory is still 56.6MB. Free memory was 41.3MB in the beginning and 40.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:29:39,423 INFO L158 Benchmark]: Boogie Preprocessor took 18.96ms. Allocated memory is still 56.6MB. Free memory was 39.9MB in the beginning and 39.1MB in the end (delta: 813.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:29:39,423 INFO L158 Benchmark]: RCFGBuilder took 300.95ms. Allocated memory is still 56.6MB. Free memory was 39.1MB in the beginning and 29.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 00:29:39,424 INFO L158 Benchmark]: TraceAbstraction took 322.23ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 28.9MB in the beginning and 44.0MB in the end (delta: -15.2MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. [2022-07-22 00:29:39,424 INFO L158 Benchmark]: Witness Printer took 29.63ms. Allocated memory is still 71.3MB. Free memory was 43.8MB in the beginning and 42.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:29:39,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.4MB in the end (delta: 52.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.98ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 41.3MB in the end (delta: -6.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.22ms. Allocated memory is still 56.6MB. Free memory was 41.3MB in the beginning and 40.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.96ms. Allocated memory is still 56.6MB. Free memory was 39.9MB in the beginning and 39.1MB in the end (delta: 813.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 300.95ms. Allocated memory is still 56.6MB. Free memory was 39.1MB in the beginning and 29.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 322.23ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 28.9MB in the beginning and 44.0MB in the end (delta: -15.2MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. * Witness Printer took 29.63ms. Allocated memory is still 71.3MB. Free memory was 43.8MB in the beginning and 42.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L24] int x = __VERIFIER_nondet_int(); [L25] CALL rec2(x) VAL [\old(j)=2147483647] [L18] COND FALSE !(j <= 0) VAL [\old(j)=2147483647, j=2147483647] [L20] j+1 VAL [\old(j)=2147483647, j=2147483647] - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: 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 3 procedures, 45 locations, 10 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=45occurred 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! [2022-07-22 00:29:39,465 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)