./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 839c364b 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:36:41,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:36:41,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:36:42,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:36:42,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:36:42,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:36:42,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:36:42,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:36:42,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:36:42,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:36:42,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:36:42,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:36:42,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:36:42,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:36:42,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:36:42,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:36:42,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:36:42,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:36:42,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:36:42,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:36:42,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:36:42,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:36:42,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:36:42,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:36:42,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:36:42,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:36:42,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:36:42,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:36:42,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:36:42,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:36:42,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:36:42,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:36:42,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:36:42,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:36:42,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:36:42,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:36:42,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:36:42,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:36:42,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:36:42,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:36:42,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:36:42,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-14 22:36:42,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:36:42,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:36:42,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:36:42,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:36:42,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:36:42,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:36:42,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:36:42,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:36:42,094 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:36:42,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:36:42,095 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:36:42,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:36:42,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:36:42,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 22:36:42,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:36:42,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 22:36:42,097 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-14 22:36:42,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:36:42,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:36:42,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 22:36:42,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:36:42,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:36:42,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:36:42,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:36:42,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:36:42,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:36:42,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 22:36:42,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:36:42,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 22:36:42,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 22:36:42,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:36:42,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86bd149cf8dcec56d0b62aefda03e866c4e374070f20ea19c317a4fa78bf8c1 [2021-12-14 22:36:42,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:36:42,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:36:42,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:36:42,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:36:42,344 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:36:42,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2021-12-14 22:36:42,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54eecb7d0/b931422b498c47fcb09015d3801926c6/FLAGe4f9947b0 [2021-12-14 22:36:42,765 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:36:42,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2021-12-14 22:36:42,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54eecb7d0/b931422b498c47fcb09015d3801926c6/FLAGe4f9947b0 [2021-12-14 22:36:43,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54eecb7d0/b931422b498c47fcb09015d3801926c6 [2021-12-14 22:36:43,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:36:43,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:36:43,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:36:43,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:36:43,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:36:43,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe35bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43, skipping insertion in model container [2021-12-14 22:36:43,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:36:43,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:36:43,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:36:43,373 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:36:43,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:36:43,405 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:36:43,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43 WrapperNode [2021-12-14 22:36:43,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:36:43,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:36:43,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:36:43,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:36:43,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,429 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2021-12-14 22:36:43,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:36:43,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:36:43,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:36:43,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:36:43,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:36:43,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:36:43,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:36:43,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:36:43,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (1/1) ... [2021-12-14 22:36:43,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:36:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:36:43,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 22:36:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 22:36:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-12-14 22:36:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-12-14 22:36:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-12-14 22:36:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-12-14 22:36:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:36:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:36:43,546 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:36:43,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:36:43,627 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:36:43,633 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:36:43,634 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 22:36:43,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:36:43 BoogieIcfgContainer [2021-12-14 22:36:43,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:36:43,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 22:36:43,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 22:36:43,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 22:36:43,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:36:43" (1/3) ... [2021-12-14 22:36:43,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548df733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:36:43, skipping insertion in model container [2021-12-14 22:36:43,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:43" (2/3) ... [2021-12-14 22:36:43,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548df733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:36:43, skipping insertion in model container [2021-12-14 22:36:43,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:36:43" (3/3) ... [2021-12-14 22:36:43,642 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1a-1.c [2021-12-14 22:36:43,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 22:36:43,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-12-14 22:36:43,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 22:36:43,698 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 22:36:43,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-12-14 22:36:43,740 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) [2021-12-14 22:36:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 22:36:43,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:36:43,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 22:36:43,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-14 22:36:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:36:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2132374368, now seen corresponding path program 1 times [2021-12-14 22:36:43,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:36:43,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421740450] [2021-12-14 22:36:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:36:43,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:36:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:36:43,883 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:36:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:36:43,917 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:36:43,919 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 22:36:43,921 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2021-12-14 22:36:43,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2021-12-14 22:36:43,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2021-12-14 22:36:43,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2021-12-14 22:36:43,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2021-12-14 22:36:43,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2021-12-14 22:36:43,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2021-12-14 22:36:43,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2021-12-14 22:36:43,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2021-12-14 22:36:43,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2021-12-14 22:36:43,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 22:36:43,939 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 22:36:43,942 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 22:36:43,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:36:43 BoogieIcfgContainer [2021-12-14 22:36:43,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 22:36:43,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 22:36:43,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 22:36:43,963 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 22:36:43,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:36:43" (3/4) ... [2021-12-14 22:36:43,966 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-14 22:36:44,001 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 22:36:44,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 22:36:44,003 INFO L158 Benchmark]: Toolchain (without parser) took 794.04ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 59.9MB in the beginning and 87.7MB in the end (delta: -27.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:36:44,004 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 90.2MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:36:44,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.10ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 67.9MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 22:36:44,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.30ms. Allocated memory is still 90.2MB. Free memory was 67.9MB in the beginning and 66.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:36:44,009 INFO L158 Benchmark]: Boogie Preprocessor took 18.91ms. Allocated memory is still 90.2MB. Free memory was 66.2MB in the beginning and 65.5MB in the end (delta: 732.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 22:36:44,010 INFO L158 Benchmark]: RCFGBuilder took 186.45ms. Allocated memory is still 90.2MB. Free memory was 65.5MB in the beginning and 56.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 22:36:44,010 INFO L158 Benchmark]: TraceAbstraction took 322.40ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 87.7MB in the end (delta: -32.0MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-12-14 22:36:44,011 INFO L158 Benchmark]: Witness Printer took 39.49ms. Allocated memory is still 111.1MB. Free memory was 87.7MB in the beginning and 87.7MB in the end (delta: -82.2kB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-12-14 22:36:44,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 90.2MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.10ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 67.9MB in the end (delta: -8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.30ms. Allocated memory is still 90.2MB. Free memory was 67.9MB in the beginning and 66.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.91ms. Allocated memory is still 90.2MB. Free memory was 66.2MB in the beginning and 65.5MB in the end (delta: 732.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 186.45ms. Allocated memory is still 90.2MB. Free memory was 65.5MB in the beginning and 56.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 322.40ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 87.7MB in the end (delta: -32.0MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Witness Printer took 39.49ms. Allocated memory is still 111.1MB. Free memory was 87.7MB in the beginning and 87.7MB in the end (delta: -82.2kB). Peak memory consumption was 4.4MB. 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: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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! [2021-12-14 22:36:44,056 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)