./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:35:00,968 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:35:01,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-11-27 23:35:01,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:35:01,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:35:01,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:35:01,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:35:01,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:35:01,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:35:01,110 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:35:01,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:35:01,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:35:01,112 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:35:01,112 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-27 23:35:01,112 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-27 23:35:01,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-27 23:35:01,113 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:35:01,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:35:01,115 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-27 23:35:01,115 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:35:01,115 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:35:01,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:35:01,116 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:35:01,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:35:01,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL_NO_AM [2024-11-27 23:35:01,116 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-27 23:35:01,117 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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(F end) ) 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 -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2024-11-27 23:35:01,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:35:01,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:35:01,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:35:01,422 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:35:01,423 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:35:01,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2024-11-27 23:35:04,762 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/data/9c8984498/e5351c7a3d184a8780be96dd3466fb8f/FLAG381b5c484 [2024-11-27 23:35:05,013 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:35:05,013 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2024-11-27 23:35:05,019 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/data/9c8984498/e5351c7a3d184a8780be96dd3466fb8f/FLAG381b5c484 [2024-11-27 23:35:05,036 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/data/9c8984498/e5351c7a3d184a8780be96dd3466fb8f [2024-11-27 23:35:05,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:35:05,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:35:05,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:35:05,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:35:05,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:35:05,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4522e481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05, skipping insertion in model container [2024-11-27 23:35:05,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,065 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:35:05,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:35:05,250 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:35:05,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:35:05,282 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:35:05,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05 WrapperNode [2024-11-27 23:35:05,283 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:35:05,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:35:05,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:35:05,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:35:05,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,301 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,317 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 10 [2024-11-27 23:35:05,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:35:05,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:35:05,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:35:05,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:35:05,328 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,338 INFO L175 MemorySlicer]: No memory access in input program. [2024-11-27 23:35:05,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,342 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:35:05,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:35:05,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:35:05,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:35:05,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (1/1) ... [2024-11-27 23:35:05,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-27 23:35:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:05,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-27 23:35:05,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-11-27 23:35:05,451 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2024-11-27 23:35:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2024-11-27 23:35:05,452 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2024-11-27 23:35:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2024-11-27 23:35:05,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:35:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:35:05,519 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:35:05,521 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:35:05,657 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-27 23:35:05,657 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:35:05,667 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:35:05,668 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 23:35:05,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:35:05 BoogieIcfgContainer [2024-11-27 23:35:05,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:35:05,669 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-27 23:35:05,670 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-27 23:35:05,677 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-27 23:35:05,678 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-27 23:35:05,678 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.11 11:35:05" (1/3) ... [2024-11-27 23:35:05,679 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dc9967a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.11 11:35:05, skipping insertion in model container [2024-11-27 23:35:05,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-27 23:35:05,680 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:35:05" (2/3) ... [2024-11-27 23:35:05,680 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dc9967a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.11 11:35:05, skipping insertion in model container [2024-11-27 23:35:05,680 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-27 23:35:05,680 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:35:05" (3/3) ... [2024-11-27 23:35:05,682 INFO L363 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2024-11-27 23:35:05,739 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-27 23:35:05,739 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-27 23:35:05,739 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-27 23:35:05,740 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-27 23:35:05,740 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-27 23:35:05,740 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-27 23:35:05,740 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-27 23:35:05,741 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-27 23:35:05,746 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-11-27 23:35:05,772 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-27 23:35:05,773 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-27 23:35:05,773 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-27 23:35:05,780 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-11-27 23:35:05,780 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:05,780 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-27 23:35:05,780 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-11-27 23:35:05,782 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-27 23:35:05,782 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-27 23:35:05,784 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-27 23:35:05,785 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-11-27 23:35:05,785 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:05,794 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;" "assume !!(main_~x~0#1 <= 2147483646);" "call main_#t~ret6#1 := rec2(main_~x~0#1);"< [2024-11-27 23:35:05,795 INFO L749 eck$LassoCheckResult]: Loop: "~j := #in~j;" "assume !(~j <= 0);" "call #t~ret3 := rec1(1 + ~j);"< "~i := #in~i;" "assume ~i <= 0;#res := 0;" "assume true;" >"#39#return;" "call #t~ret4 := rec2(#t~ret3);"< [2024-11-27 23:35:05,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 1 times [2024-11-27 23:35:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-27 23:35:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460183722] [2024-11-27 23:35:05,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:05,904 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:35:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:05,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-27 23:35:05,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash -931063642, now seen corresponding path program 1 times [2024-11-27 23:35:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-27 23:35:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100944820] [2024-11-27 23:35:05,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:06,088 INFO L370 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-27 23:35:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:06,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL_NO_AM found an infeasible trace [2024-11-27 23:35:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100944820] [2024-11-27 23:35:06,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100944820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:06,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004579086] [2024-11-27 23:35:06,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:06,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:06,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:06,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:35:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:06,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:35:06,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:06,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004579086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:35:06,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:35:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-27 23:35:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961396013] [2024-11-27 23:35:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:06,588 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-27 23:35:06,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2024-11-27 23:35:06,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:35:06,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:35:06,624 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) Second operand has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:35:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:06,825 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2024-11-27 23:35:06,826 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 36 transitions. [2024-11-27 23:35:06,830 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-27 23:35:06,839 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 18 states and 24 transitions. [2024-11-27 23:35:06,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2024-11-27 23:35:06,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2024-11-27 23:35:06,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2024-11-27 23:35:06,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-27 23:35:06,845 INFO L218 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-27 23:35:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2024-11-27 23:35:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-27 23:35:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:35:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-11-27 23:35:06,887 INFO L240 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-27 23:35:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:35:06,896 INFO L425 stractBuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-27 23:35:06,896 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-27 23:35:06,896 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 24 transitions. [2024-11-27 23:35:06,897 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-27 23:35:06,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-27 23:35:06,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-27 23:35:06,898 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-11-27 23:35:06,901 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:06,901 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;" "assume !!(main_~x~0#1 <= 2147483646);" "call main_#t~ret6#1 := rec2(main_~x~0#1);"< [2024-11-27 23:35:06,901 INFO L749 eck$LassoCheckResult]: Loop: "~j := #in~j;" "assume !(~j <= 0);" "call #t~ret3 := rec1(1 + ~j);"< "~i := #in~i;" "assume !(~i <= 0);" "call #t~ret0 := rec1(~i - 2);"< "~i := #in~i;" "assume ~i <= 0;#res := 0;" "assume true;" >"#33#return;" "call #t~ret1 := rec1(#t~ret0 - 1);"< "~i := #in~i;" "assume ~i <= 0;#res := 0;" "assume true;" >"#35#return;" "call #t~ret2 := rec1(#t~ret1);"< "~i := #in~i;" "assume ~i <= 0;#res := 0;" "assume true;" >"#37#return;" "#res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2;" "assume true;" >"#39#return;" "call #t~ret4 := rec2(#t~ret3);"< [2024-11-27 23:35:06,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 2 times [2024-11-27 23:35:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-27 23:35:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877154457] [2024-11-27 23:35:06,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:06,912 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:35:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:06,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-27 23:35:06,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1852060604, now seen corresponding path program 1 times [2024-11-27 23:35:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-27 23:35:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951416486] [2024-11-27 23:35:06,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:06,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:06,939 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:35:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:06,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-27 23:35:06,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2035496338, now seen corresponding path program 1 times [2024-11-27 23:35:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-27 23:35:06,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091976366] [2024-11-27 23:35:06,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:06,990 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:35:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:07,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-27 23:35:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:07,667 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:35:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:35:07,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.11 11:35:07 BoogieIcfgContainer [2024-11-27 23:35:07,716 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-27 23:35:07,717 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 23:35:07,718 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 23:35:07,718 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 23:35:07,719 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:35:05" (3/4) ... [2024-11-27 23:35:07,721 INFO L143 WitnessPrinter]: Generating witness for non-termination counterexample [2024-11-27 23:35:07,771 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 23:35:07,771 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 23:35:07,772 INFO L158 Benchmark]: Toolchain (without parser) took 2731.60ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 108.7MB in the end (delta: 8.3MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2024-11-27 23:35:07,772 INFO L158 Benchmark]: CDTParser took 0.83ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:35:07,773 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.00ms. Allocated memory is still 142.6MB. Free memory was 116.7MB in the beginning and 106.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:35:07,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.52ms. Allocated memory is still 142.6MB. Free memory was 106.9MB in the beginning and 106.0MB in the end (delta: 907.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:35:07,773 INFO L158 Benchmark]: Boogie Preprocessor took 37.99ms. Allocated memory is still 142.6MB. Free memory was 106.0MB in the beginning and 105.1MB in the end (delta: 910.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:35:07,774 INFO L158 Benchmark]: RCFGBuilder took 311.11ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 95.0MB in the end (delta: 10.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:35:07,775 INFO L158 Benchmark]: BuchiAutomizer took 2047.15ms. Allocated memory is still 142.6MB. Free memory was 95.0MB in the beginning and 110.4MB in the end (delta: -15.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:35:07,775 INFO L158 Benchmark]: Witness Printer took 53.63ms. Allocated memory is still 142.6MB. Free memory was 110.4MB in the beginning and 108.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:35:07,778 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.00ms. Allocated memory is still 142.6MB. Free memory was 116.7MB in the beginning and 106.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.52ms. Allocated memory is still 142.6MB. Free memory was 106.9MB in the beginning and 106.0MB in the end (delta: 907.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.99ms. Allocated memory is still 142.6MB. Free memory was 106.0MB in the beginning and 105.1MB in the end (delta: 910.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 311.11ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 95.0MB in the end (delta: 10.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * BuchiAutomizer took 2047.15ms. Allocated memory is still 142.6MB. Free memory was 95.0MB in the beginning and 110.4MB in the end (delta: -15.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 53.63ms. Allocated memory is still 142.6MB. Free memory was 110.4MB in the beginning and 108.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 8 locations. The remainder module has 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.9s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 1.5s. Construction of modules took 0.1s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 102 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 75 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54 IncrementalHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 27 mSDtfsCounter, 54 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2024-11-27 23:35:07,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:35:08,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd082e-a450-4278-bfa6-a01ecee20d4f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with 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(TERM)