./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/GCD2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-restricted-15/GCD2.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 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 06:49:37,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 06:49:37,154 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2025-03-09 06:49:37,157 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 06:49:37,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 06:49:37,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder.Remove goto edges from RCFG [2025-03-09 06:49:37,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 06:49:37,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 06:49:37,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 06:49:37,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 06:49:37,175 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 06:49:37,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 06:49:37,175 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 06:49:37,175 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 06:49:37,175 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-03-09 06:49:37,175 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-03-09 06:49:37,175 INFO L153 SettingsManager]: * Use old map elimination=false [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-03-09 06:49:37,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-03-09 06:49:37,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 06:49:37,177 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 06:49:37,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 06:49:37,177 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 06:49:37,178 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-03-09 06:49:37,178 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 -> /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 -> 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba [2025-03-09 06:49:37,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 06:49:37,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 06:49:37,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 06:49:37,410 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 06:49:37,410 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 06:49:37,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD2.c [2025-03-09 06:49:38,591 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1e5b747/90a5c851c7ce45888fce3466c1367404/FLAGcfaf79014 [2025-03-09 06:49:38,831 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 06:49:38,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD2.c [2025-03-09 06:49:38,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1e5b747/90a5c851c7ce45888fce3466c1367404/FLAGcfaf79014 [2025-03-09 06:49:38,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1e5b747/90a5c851c7ce45888fce3466c1367404 [2025-03-09 06:49:38,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 06:49:38,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 06:49:38,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 06:49:38,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 06:49:38,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 06:49:38,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 06:49:38" (1/1) ... [2025-03-09 06:49:38,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9490386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:38, skipping insertion in model container [2025-03-09 06:49:38,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 06:49:38" (1/1) ... [2025-03-09 06:49:38,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 06:49:38,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 06:49:38,983 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 06:49:38,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 06:49:39,002 INFO L204 MainTranslator]: Completed translation [2025-03-09 06:49:39,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39 WrapperNode [2025-03-09 06:49:39,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 06:49:39,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 06:49:39,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 06:49:39,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 06:49:39,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,020 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2025-03-09 06:49:39,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 06:49:39,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 06:49:39,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 06:49:39,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 06:49:39,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,031 INFO L175 MemorySlicer]: No memory access in input program. [2025-03-09 06:49:39,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,033 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 06:49:39,038 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 06:49:39,038 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 06:49:39,038 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 06:49:39,039 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (1/1) ... [2025-03-09 06:49:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-03-09 06:49:39,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 06:49:39,068 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) [2025-03-09 06:49:39,071 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 [2025-03-09 06:49:39,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 06:49:39,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 06:49:39,132 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 06:49:39,134 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 06:49:39,199 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-09 06:49:39,200 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 06:49:39,206 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 06:49:39,207 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 06:49:39,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 06:49:39 BoogieIcfgContainer [2025-03-09 06:49:39,208 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 06:49:39,209 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-03-09 06:49:39,209 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-03-09 06:49:39,213 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-03-09 06:49:39,214 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-09 06:49:39,214 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.03 06:49:38" (1/3) ... [2025-03-09 06:49:39,215 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a8fe91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.03 06:49:39, skipping insertion in model container [2025-03-09 06:49:39,215 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-09 06:49:39,216 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 06:49:39" (2/3) ... [2025-03-09 06:49:39,216 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a8fe91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.03 06:49:39, skipping insertion in model container [2025-03-09 06:49:39,216 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-09 06:49:39,216 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 06:49:39" (3/3) ... [2025-03-09 06:49:39,217 INFO L363 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2025-03-09 06:49:39,256 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-03-09 06:49:39,256 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-03-09 06:49:39,256 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-03-09 06:49:39,256 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-03-09 06:49:39,257 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-03-09 06:49:39,257 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-03-09 06:49:39,257 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-03-09 06:49:39,257 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-03-09 06:49:39,261 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2025-03-09 06:49:39,271 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2025-03-09 06:49:39,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-09 06:49:39,272 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-09 06:49:39,276 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-09 06:49:39,277 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-03-09 06:49:39,277 INFO L338 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-03-09 06:49:39,278 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2025-03-09 06:49:39,278 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2025-03-09 06:49:39,279 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-09 06:49:39,279 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-09 06:49:39,279 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-09 06:49:39,279 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-03-09 06:49:39,285 INFO L752 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~tmp~0#1, main_~xtmp~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~tmp~0#1;havoc main_~xtmp~0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;" [2025-03-09 06:49:39,285 INFO L754 eck$LassoCheckResult]: Loop: "assume (0 != main_~y~0#1 && main_~x~0#1 >= 0) && main_~y~0#1 >= 0;main_~tmp~0#1 := main_~y~0#1;main_~xtmp~0#1 := main_~x~0#1;" "assume main_~x~0#1 == main_~y~0#1;main_~y~0#1 := 0;" "main_~y~0#1 := main_~xtmp~0#1;main_~x~0#1 := main_~tmp~0#1;" [2025-03-09 06:49:39,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 06:49:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1280, now seen corresponding path program 1 times [2025-03-09 06:49:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 06:49:39,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412023845] [2025-03-09 06:49:39,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 06:49:39,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 06:49:39,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-09 06:49:39,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-09 06:49:39,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,350 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 06:49:39,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-09 06:49:39,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-09 06:49:39,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-09 06:49:39,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 06:49:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash 37606, now seen corresponding path program 1 times [2025-03-09 06:49:39,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 06:49:39,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512798109] [2025-03-09 06:49:39,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 06:49:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 06:49:39,377 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 06:49:39,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 06:49:39,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,385 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 06:49:39,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 06:49:39,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 06:49:39,394 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-09 06:49:39,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 06:49:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 38140295, now seen corresponding path program 1 times [2025-03-09 06:49:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 06:49:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645951396] [2025-03-09 06:49:39,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 06:49:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 06:49:39,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 06:49:39,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 06:49:39,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,411 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 06:49:39,413 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 06:49:39,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 06:49:39,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-09 06:49:39,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-09 06:49:39,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-09 06:49:39,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,535 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 06:49:39,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-09 06:49:39,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-09 06:49:39,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 06:49:39,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 06:49:39,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.03 06:49:39 BoogieIcfgContainer [2025-03-09 06:49:39,554 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-03-09 06:49:39,555 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 06:49:39,555 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 06:49:39,555 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 06:49:39,556 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 06:49:39" (3/4) ... [2025-03-09 06:49:39,557 INFO L143 WitnessPrinter]: Generating witness for non-termination counterexample [2025-03-09 06:49:39,582 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-09 06:49:39,585 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 06:49:39,587 INFO L158 Benchmark]: Toolchain (without parser) took 728.44ms. Allocated memory is still 167.8MB. Free memory was 132.4MB in the beginning and 90.3MB in the end (delta: 42.1MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-03-09 06:49:39,588 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 226.5MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 06:49:39,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.74ms. Allocated memory is still 167.8MB. Free memory was 131.8MB in the beginning and 122.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 06:49:39,589 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.29ms. Allocated memory is still 167.8MB. Free memory was 122.2MB in the beginning and 121.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 06:49:39,589 INFO L158 Benchmark]: Boogie Preprocessor took 16.53ms. Allocated memory is still 167.8MB. Free memory was 121.1MB in the beginning and 120.6MB in the end (delta: 539.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 06:49:39,589 INFO L158 Benchmark]: IcfgBuilder took 170.15ms. Allocated memory is still 167.8MB. Free memory was 120.6MB in the beginning and 110.5MB in the end (delta: 10.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 06:49:39,589 INFO L158 Benchmark]: BuchiAutomizer took 345.79ms. Allocated memory is still 167.8MB. Free memory was 110.5MB in the beginning and 93.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 06:49:39,589 INFO L158 Benchmark]: Witness Printer took 29.65ms. Allocated memory is still 167.8MB. Free memory was 93.2MB in the beginning and 90.3MB in the end (delta: 2.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 06:49:39,593 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 226.5MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.74ms. Allocated memory is still 167.8MB. Free memory was 131.8MB in the beginning and 122.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.29ms. Allocated memory is still 167.8MB. Free memory was 122.2MB in the beginning and 121.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.53ms. Allocated memory is still 167.8MB. Free memory was 121.1MB in the beginning and 120.6MB in the end (delta: 539.4kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 170.15ms. Allocated memory is still 167.8MB. Free memory was 120.6MB in the beginning and 110.5MB in the end (delta: 10.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * BuchiAutomizer took 345.79ms. Allocated memory is still 167.8MB. Free memory was 110.5MB in the beginning and 93.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 29.65ms. Allocated memory is still 167.8MB. Free memory was 93.2MB in the beginning and 90.3MB in the end (delta: 2.9MB). 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 0.2s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.2s. 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: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2025-03-09 06:49:39,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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)