./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.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_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/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_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/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_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/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 fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:56:24,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:56:24,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-11-28 02:56:24,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:56:24,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:56:24,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:56:24,904 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:56:24,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:56:24,905 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:56:24,905 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:56:24,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:56:24,905 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:56:24,906 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:56:24,906 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-28 02:56:24,906 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-28 02:56:24,906 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-28 02:56:24,906 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-28 02:56:24,906 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-28 02:56:24,907 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-28 02:56:24,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:56:24,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-28 02:56:24,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:56:24,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:56:24,908 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-28 02:56:24,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-28 02:56:24,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-28 02:56:24,909 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:56:24,910 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:56:24,910 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-28 02:56:24,910 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:56:24,911 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:56:24,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:56:24,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:56:24,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:56:24,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL_NO_AM [2024-11-28 02:56:24,912 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-28 02:56:24,912 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_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/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 -> fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 [2024-11-28 02:56:25,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:56:25,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:56:25,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:56:25,246 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:56:25,246 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:56:25,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2024-11-28 02:56:28,372 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/data/eb32bf536/468043fd787f416b831cb44abbdc100f/FLAGbeb4b6684 [2024-11-28 02:56:28,651 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:56:28,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2024-11-28 02:56:28,670 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/data/eb32bf536/468043fd787f416b831cb44abbdc100f/FLAGbeb4b6684 [2024-11-28 02:56:28,703 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/data/eb32bf536/468043fd787f416b831cb44abbdc100f [2024-11-28 02:56:28,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:56:28,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:56:28,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:56:28,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:56:28,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:56:28,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:28,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe02808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28, skipping insertion in model container [2024-11-28 02:56:28,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:28,767 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:56:28,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:56:28,949 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:56:28,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:56:28,984 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:56:28,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28 WrapperNode [2024-11-28 02:56:28,985 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:56:28,986 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:56:28,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:56:28,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:56:28,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:28,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,017 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2024-11-28 02:56:29,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:56:29,018 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:56:29,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:56:29,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:56:29,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,029 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,036 INFO L175 MemorySlicer]: No memory access in input program. [2024-11-28 02:56:29,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,040 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,045 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:56:29,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:56:29,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:56:29,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:56:29,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (1/1) ... [2024-11-28 02:56:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-28 02:56:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:56:29,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-28 02:56:29,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-11-28 02:56:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2024-11-28 02:56:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2024-11-28 02:56:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:56:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:56:29,200 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:56:29,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:56:29,328 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-11-28 02:56:29,329 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:56:29,342 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:56:29,343 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 02:56:29,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:29 BoogieIcfgContainer [2024-11-28 02:56:29,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:56:29,346 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-28 02:56:29,347 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-28 02:56:29,355 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-28 02:56:29,356 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-28 02:56:29,356 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:56:28" (1/3) ... [2024-11-28 02:56:29,358 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23306d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:29, skipping insertion in model container [2024-11-28 02:56:29,358 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-28 02:56:29,358 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:28" (2/3) ... [2024-11-28 02:56:29,359 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23306d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:29, skipping insertion in model container [2024-11-28 02:56:29,359 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-28 02:56:29,361 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:29" (3/3) ... [2024-11-28 02:56:29,362 INFO L363 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2024-11-28 02:56:29,432 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-28 02:56:29,433 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-28 02:56:29,433 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-28 02:56:29,434 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-28 02:56:29,434 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-28 02:56:29,434 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-28 02:56:29,434 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-28 02:56:29,434 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-28 02:56:29,441 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:56:29,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-11-28 02:56:29,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-28 02:56:29,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-28 02:56:29,481 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-11-28 02:56:29,481 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-28 02:56:29,481 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-28 02:56:29,482 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:56:29,483 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-11-28 02:56:29,483 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-28 02:56:29,484 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-28 02:56:29,484 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-11-28 02:56:29,484 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-28 02:56:29,494 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~n~0#1;havoc main_#t~nondet0#1;main_~n~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;" "assume !!(main_~n~0#1 <= 2147483646);" "call rec(main_~n~0#1, 1 + main_~n~0#1);"< [2024-11-28 02:56:29,494 INFO L749 eck$LassoCheckResult]: Loop: "~x := #in~x;~y := #in~y;" "assume ~x <= 23 && ~x >= -42;" "call rec(2 * ~y - 2, 1 + ~x);"< [2024-11-28 02:56:29,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1202731, now seen corresponding path program 1 times [2024-11-28 02:56:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-28 02:56:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147267698] [2024-11-28 02:56:29,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,585 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:56:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-28 02:56:29,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 29906, now seen corresponding path program 1 times [2024-11-28 02:56:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-28 02:56:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524957124] [2024-11-28 02:56:29,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,619 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:56:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-28 02:56:29,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1470820968, now seen corresponding path program 1 times [2024-11-28 02:56:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2024-11-28 02:56:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309348515] [2024-11-28 02:56:29,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,642 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:56:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:29,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2024-11-28 02:56:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:30,009 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:56:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:56:30,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:56:30 BoogieIcfgContainer [2024-11-28 02:56:30,041 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-28 02:56:30,042 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 02:56:30,042 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 02:56:30,042 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 02:56:30,043 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:29" (3/4) ... [2024-11-28 02:56:30,046 INFO L143 WitnessPrinter]: Generating witness for non-termination counterexample [2024-11-28 02:56:30,080 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 02:56:30,080 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 02:56:30,082 INFO L158 Benchmark]: Toolchain (without parser) took 1370.19ms. Allocated memory is still 142.6MB. Free memory was 120.3MB in the beginning and 76.7MB in the end (delta: 43.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-11-28 02:56:30,082 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:56:30,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.43ms. Allocated memory is still 142.6MB. Free memory was 120.0MB in the beginning and 110.4MB in the end (delta: 9.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:56:30,083 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.82ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 109.4MB in the end (delta: 755.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:56:30,083 INFO L158 Benchmark]: Boogie Preprocessor took 31.89ms. Allocated memory is still 142.6MB. Free memory was 109.4MB in the beginning and 108.4MB in the end (delta: 997.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:56:30,084 INFO L158 Benchmark]: RCFGBuilder took 295.03ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 99.6MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:56:30,084 INFO L158 Benchmark]: BuchiAutomizer took 694.88ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 78.4MB in the end (delta: 21.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 02:56:30,085 INFO L158 Benchmark]: Witness Printer took 38.12ms. Allocated memory is still 142.6MB. Free memory was 78.4MB in the beginning and 76.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:56:30,087 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.43ms. Allocated memory is still 142.6MB. Free memory was 120.0MB in the beginning and 110.4MB in the end (delta: 9.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.82ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 109.4MB in the end (delta: 755.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.89ms. Allocated memory is still 142.6MB. Free memory was 109.4MB in the beginning and 108.4MB in the end (delta: 997.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 295.03ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 99.6MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 694.88ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 78.4MB in the end (delta: 21.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 38.12ms. Allocated memory is still 142.6MB. Free memory was 78.4MB in the beginning and 76.7MB in the end (delta: 1.7MB). 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 Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.6s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. 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: LassoAnalysisResults: nont1 unkn0 SFLI0 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: 10]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L17] int n = __VERIFIER_nondet_int(); [L18] COND FALSE !(!(n<=2147483646)) VAL [n=0] [L19] CALL rec(n, n + 1) VAL [\old(x)=0, \old(y)=1] Loop: [L11] COND TRUE x <= 23 && x >= -42 [L12] CALL rec(2*y-2, x + 1) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L17] int n = __VERIFIER_nondet_int(); [L18] COND FALSE !(!(n<=2147483646)) VAL [n=0] [L19] CALL rec(n, n + 1) VAL [\old(x)=0, \old(y)=1] Loop: [L11] COND TRUE x <= 23 && x >= -42 [L12] CALL rec(2*y-2, x + 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2024-11-28 02:56:30,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f04b9d-5b8a-4aeb-a1d2-c9a215ed602b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (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(TERM)