./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 c06467573d5b161d2e6fae8b3debbeebc37f400272e6a21d533eff435db2aec4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 14:14:11,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 14:14:11,298 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-11-19 14:14:11,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 14:14:11,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 14:14:11,339 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 14:14:11,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 14:14:11,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 14:14:11,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 14:14:11,343 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 14:14:11,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 14:14:11,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 14:14:11,344 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 14:14:11,345 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-19 14:14:11,347 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-19 14:14:11,347 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-19 14:14:11,348 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-19 14:14:11,348 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-19 14:14:11,348 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-19 14:14:11,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 14:14:11,349 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-19 14:14:11,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 14:14:11,351 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 14:14:11,351 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-19 14:14:11,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-19 14:14:11,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-19 14:14:11,352 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 14:14:11,352 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 14:14:11,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 14:14:11,353 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-19 14:14:11,353 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 14:14:11,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 14:14:11,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 14:14:11,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 14:14:11,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 14:14:11,361 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-19 14:14:11,362 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c06467573d5b161d2e6fae8b3debbeebc37f400272e6a21d533eff435db2aec4 [2024-11-19 14:14:11,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 14:14:11,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 14:14:11,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 14:14:11,649 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 14:14:11,650 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 14:14:11,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2024-11-19 14:14:13,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 14:14:13,287 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 14:14:13,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2024-11-19 14:14:13,294 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d221d60c/75a70c4151a0485d91e0ca49109b111f/FLAG5e1dae67f [2024-11-19 14:14:13,700 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d221d60c/75a70c4151a0485d91e0ca49109b111f [2024-11-19 14:14:13,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 14:14:13,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 14:14:13,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 14:14:13,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 14:14:13,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 14:14:13,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20724795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13, skipping insertion in model container [2024-11-19 14:14:13,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,728 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 14:14:13,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 14:14:13,906 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 14:14:13,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 14:14:13,934 INFO L204 MainTranslator]: Completed translation [2024-11-19 14:14:13,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13 WrapperNode [2024-11-19 14:14:13,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 14:14:13,936 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 14:14:13,936 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 14:14:13,936 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 14:14:13,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,946 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,962 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2024-11-19 14:14:13,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 14:14:13,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 14:14:13,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 14:14:13,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 14:14:13,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,976 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,981 INFO L175 MemorySlicer]: No memory access in input program. [2024-11-19 14:14:13,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 14:14:13,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 14:14:13,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 14:14:13,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 14:14:13,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (1/1) ... [2024-11-19 14:14:13,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-19 14:14:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:14:14,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-19 14:14:14,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-11-19 14:14:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 14:14:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 14:14:14,154 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 14:14:14,157 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 14:14:14,217 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-19 14:14:14,217 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 14:14:14,231 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 14:14:14,231 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 14:14:14,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:14 BoogieIcfgContainer [2024-11-19 14:14:14,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 14:14:14,233 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-19 14:14:14,233 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-19 14:14:14,237 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-19 14:14:14,238 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-19 14:14:14,238 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 02:14:13" (1/3) ... [2024-11-19 14:14:14,239 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6252f793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 02:14:14, skipping insertion in model container [2024-11-19 14:14:14,239 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-19 14:14:14,240 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:13" (2/3) ... [2024-11-19 14:14:14,241 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6252f793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 02:14:14, skipping insertion in model container [2024-11-19 14:14:14,241 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-19 14:14:14,242 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:14" (3/3) ... [2024-11-19 14:14:14,244 INFO L332 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2024-11-19 14:14:14,301 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-19 14:14:14,301 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-19 14:14:14,301 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-19 14:14:14,301 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-19 14:14:14,302 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-19 14:14:14,302 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-19 14:14:14,302 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-19 14:14:14,303 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-19 14:14:14,308 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:14:14,321 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2024-11-19 14:14:14,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-19 14:14:14,322 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-19 14:14:14,326 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-19 14:14:14,327 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2024-11-19 14:14:14,327 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-19 14:14:14,327 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:14:14,328 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2024-11-19 14:14:14,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-19 14:14:14,329 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-19 14:14:14,329 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-19 14:14:14,329 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2024-11-19 14:14:14,338 INFO L745 eck$LassoCheckResult]: Stem: 6#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~k~0#1, main_~i~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_#t~nondet0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 3#L18true assume !(main_~k~0#1 >= 0);main_~i~0#1 := -1; 8#L23-1true [2024-11-19 14:14:14,339 INFO L747 eck$LassoCheckResult]: Loop: 8#L23-1true assume !!(main_~i~0#1 >= 0);havoc main_#t~nondet2#1;main_~i~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 8#L23-1true [2024-11-19 14:14:14,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2024-11-19 14:14:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942877461] [2024-11-19 14:14:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:14:14,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,419 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 14:14:14,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 47, now seen corresponding path program 1 times [2024-11-19 14:14:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18266618] [2024-11-19 14:14:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:14:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 14:14:14,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 925676, now seen corresponding path program 1 times [2024-11-19 14:14:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602723894] [2024-11-19 14:14:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:14:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:14:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:14:14,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:14:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602723894] [2024-11-19 14:14:14,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602723894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:14:14,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:14:14,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 14:14:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207073663] [2024-11-19 14:14:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:14:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:14:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 14:14:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 14:14:14,584 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:14:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 14:14:14,604 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2024-11-19 14:14:14,605 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2024-11-19 14:14:14,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2024-11-19 14:14:14,609 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 4 states and 4 transitions. [2024-11-19 14:14:14,610 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2024-11-19 14:14:14,610 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2024-11-19 14:14:14,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 4 transitions. [2024-11-19 14:14:14,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-19 14:14:14,611 INFO L218 hiAutomatonCegarLoop]: Abstraction has 4 states and 4 transitions. [2024-11-19 14:14:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states and 4 transitions. [2024-11-19 14:14:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2024-11-19 14:14:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:14:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2024-11-19 14:14:14,635 INFO L240 hiAutomatonCegarLoop]: Abstraction has 4 states and 4 transitions. [2024-11-19 14:14:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 14:14:14,644 INFO L425 stractBuchiCegarLoop]: Abstraction has 4 states and 4 transitions. [2024-11-19 14:14:14,645 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-19 14:14:14,645 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4 states and 4 transitions. [2024-11-19 14:14:14,646 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2024-11-19 14:14:14,646 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-19 14:14:14,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-19 14:14:14,647 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-19 14:14:14,647 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2024-11-19 14:14:14,647 INFO L745 eck$LassoCheckResult]: Stem: 30#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 31#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~k~0#1, main_~i~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_#t~nondet0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 28#L18 assume main_~k~0#1 >= 0; 29#L23-1 [2024-11-19 14:14:14,648 INFO L747 eck$LassoCheckResult]: Loop: 29#L23-1 assume !!(main_~i~0#1 >= 0);havoc main_#t~nondet2#1;main_~i~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 29#L23-1 [2024-11-19 14:14:14,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-19 14:14:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109840729] [2024-11-19 14:14:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:14:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 14:14:14,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash 47, now seen corresponding path program 2 times [2024-11-19 14:14:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745212242] [2024-11-19 14:14:14,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:14:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 14:14:14,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-19 14:14:14,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 14:14:14,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:14:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash 925614, now seen corresponding path program 1 times [2024-11-19 14:14:14,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:14:14,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62563074] [2024-11-19 14:14:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:14:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:14:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,700 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 14:14:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 14:14:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 14:14:14,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 02:14:14 BoogieIcfgContainer [2024-11-19 14:14:14,761 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-19 14:14:14,762 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-19 14:14:14,762 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-19 14:14:14,762 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-19 14:14:14,763 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:14" (3/4) ... [2024-11-19 14:14:14,766 INFO L139 WitnessPrinter]: Generating witness for non-termination counterexample [2024-11-19 14:14:14,805 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-19 14:14:14,806 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-19 14:14:14,809 INFO L158 Benchmark]: Toolchain (without parser) took 1103.08ms. Allocated memory is still 176.2MB. Free memory was 119.3MB in the beginning and 66.4MB in the end (delta: 52.9MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,809 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 176.2MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 14:14:14,810 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.30ms. Allocated memory is still 176.2MB. Free memory was 119.3MB in the beginning and 107.5MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,813 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.68ms. Allocated memory is still 176.2MB. Free memory was 107.5MB in the beginning and 106.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,813 INFO L158 Benchmark]: Boogie Preprocessor took 25.10ms. Allocated memory is still 176.2MB. Free memory was 106.3MB in the beginning and 104.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 14:14:14,814 INFO L158 Benchmark]: RCFGBuilder took 242.35ms. Allocated memory is still 176.2MB. Free memory was 104.6MB in the beginning and 95.4MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,814 INFO L158 Benchmark]: BuchiAutomizer took 528.43ms. Allocated memory is still 176.2MB. Free memory was 95.4MB in the beginning and 68.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,814 INFO L158 Benchmark]: Witness Printer took 43.82ms. Allocated memory is still 176.2MB. Free memory was 68.1MB in the beginning and 66.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 14:14:14,816 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 176.2MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.30ms. Allocated memory is still 176.2MB. Free memory was 119.3MB in the beginning and 107.5MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.68ms. Allocated memory is still 176.2MB. Free memory was 107.5MB in the beginning and 106.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.10ms. Allocated memory is still 176.2MB. Free memory was 106.3MB in the beginning and 104.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 242.35ms. Allocated memory is still 176.2MB. Free memory was 104.6MB in the beginning and 95.4MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 528.43ms. Allocated memory is still 176.2MB. Free memory was 95.4MB in the beginning and 68.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Witness Printer took 43.82ms. Allocated memory is still 176.2MB. Free memory was 68.1MB in the beginning and 66.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. 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 3 locations. The remainder module has 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. 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, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 9 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 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: 23]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 23]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2024-11-19 14:14:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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)