./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c7c6ca5d 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/NestedRecursion_1c.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 f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 15:18:31,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 15:18:31,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-11-09 15:18:31,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 15:18:31,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 15:18:31,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 15:18:31,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 15:18:31,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 15:18:31,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 15:18:31,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 15:18:31,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 15:18:31,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 15:18:31,103 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 15:18:31,105 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-09 15:18:31,105 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-09 15:18:31,105 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-09 15:18:31,105 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-09 15:18:31,106 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-09 15:18:31,106 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-09 15:18:31,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 15:18:31,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-09 15:18:31,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 15:18:31,109 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 15:18:31,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-09 15:18:31,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-09 15:18:31,110 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 15:18:31,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 15:18:31,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 15:18:31,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 15:18:31,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 15:18:31,112 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-09 15:18:31,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 [2024-11-09 15:18:31,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 15:18:31,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 15:18:31,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 15:18:31,362 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 15:18:31,362 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 15:18:31,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2024-11-09 15:18:32,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 15:18:32,788 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 15:18:32,789 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2024-11-09 15:18:32,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f72869b/668d2c260a5a4496968bb5ed15cfccf9/FLAG0664c75ee [2024-11-09 15:18:32,806 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f72869b/668d2c260a5a4496968bb5ed15cfccf9 [2024-11-09 15:18:32,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 15:18:32,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 15:18:32,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 15:18:32,811 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 15:18:32,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 15:18:32,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 03:18:32" (1/1) ... [2024-11-09 15:18:32,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc0192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:32, skipping insertion in model container [2024-11-09 15:18:32,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 03:18:32" (1/1) ... [2024-11-09 15:18:32,831 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 15:18:32,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 15:18:32,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 15:18:33,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 15:18:33,016 INFO L204 MainTranslator]: Completed translation [2024-11-09 15:18:33,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33 WrapperNode [2024-11-09 15:18:33,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 15:18:33,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 15:18:33,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 15:18:33,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 15:18:33,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,026 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,038 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 7 [2024-11-09 15:18:33,039 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 15:18:33,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 15:18:33,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 15:18:33,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 15:18:33,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,048 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,053 INFO L175 MemorySlicer]: No memory access in input program. [2024-11-09 15:18:33,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,056 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,058 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 15:18:33,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 15:18:33,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 15:18:33,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 15:18:33,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (1/1) ... [2024-11-09 15:18:33,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,098 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) [2024-11-09 15:18:33,100 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 [2024-11-09 15:18:33,138 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2024-11-09 15:18:33,139 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2024-11-09 15:18:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2024-11-09 15:18:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2024-11-09 15:18:33,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 15:18:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 15:18:33,187 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 15:18:33,190 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 15:18:33,335 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-09 15:18:33,335 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 15:18:33,350 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 15:18:33,350 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 15:18:33,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 03:18:33 BoogieIcfgContainer [2024-11-09 15:18:33,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 15:18:33,351 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-09 15:18:33,351 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-09 15:18:33,358 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-09 15:18:33,358 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-09 15:18:33,359 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.11 03:18:32" (1/3) ... [2024-11-09 15:18:33,359 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@251d1530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 03:18:33, skipping insertion in model container [2024-11-09 15:18:33,359 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-09 15:18:33,359 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:18:33" (2/3) ... [2024-11-09 15:18:33,360 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@251d1530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 03:18:33, skipping insertion in model container [2024-11-09 15:18:33,360 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-09 15:18:33,360 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 03:18:33" (3/3) ... [2024-11-09 15:18:33,360 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2024-11-09 15:18:33,414 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-09 15:18:33,418 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-09 15:18:33,418 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-09 15:18:33,418 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-09 15:18:33,418 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-09 15:18:33,418 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-09 15:18:33,418 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-09 15:18:33,419 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-09 15:18:33,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 15:18:33,443 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2024-11-09 15:18:33,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-09 15:18:33,445 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-09 15:18:33,453 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-09 15:18:33,453 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-09 15:18:33,453 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-09 15:18:33,454 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 15:18:33,455 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2024-11-09 15:18:33,455 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-09 15:18:33,455 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-09 15:18:33,456 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-09 15:18:33,456 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-09 15:18:33,461 INFO L745 eck$LassoCheckResult]: Stem: 21#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 10#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 7#$Ultimate##0true [2024-11-09 15:18:33,461 INFO L747 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec2(~j - 1);< 7#$Ultimate##0true [2024-11-09 15:18:33,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2024-11-09 15:18:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:33,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106616905] [2024-11-09 15:18:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:33,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 39868, now seen corresponding path program 1 times [2024-11-09 15:18:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702949856] [2024-11-09 15:18:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:33,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1451963835, now seen corresponding path program 1 times [2024-11-09 15:18:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:33,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772803002] [2024-11-09 15:18:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:33,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:33,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:33,653 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:33,653 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:33,653 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:33,654 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:33,654 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-09 15:18:33,654 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,654 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:33,654 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:33,654 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2024-11-09 15:18:33,654 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:33,654 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:33,664 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,670 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,673 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,696 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,698 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,731 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:33,732 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-09 15:18:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,735 INFO L229 MonitoredProcess]: Starting monitored process 2 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) [2024-11-09 15:18:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2024-11-09 15:18:33,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:33,737 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:33,755 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:33,755 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:33,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2024-11-09 15:18:33,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,769 INFO L229 MonitoredProcess]: Starting monitored process 3 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) [2024-11-09 15:18:33,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2024-11-09 15:18:33,774 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:33,774 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:33,787 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:33,787 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:33,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,801 INFO L229 MonitoredProcess]: Starting monitored process 4 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) [2024-11-09 15:18:33,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2024-11-09 15:18:33,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:33,803 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:33,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2024-11-09 15:18:33,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,832 INFO L229 MonitoredProcess]: Starting monitored process 5 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) [2024-11-09 15:18:33,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2024-11-09 15:18:33,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-09 15:18:33,836 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:33,893 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-09 15:18:33,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2024-11-09 15:18:33,899 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:33,899 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:33,899 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:33,899 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:33,899 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-09 15:18:33,899 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,899 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:33,899 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:33,900 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2024-11-09 15:18:33,900 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:33,900 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:33,901 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,912 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,915 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,922 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,928 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:33,959 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:33,963 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-09 15:18:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:33,967 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2024-11-09 15:18:33,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2024-11-09 15:18:33,972 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:33,983 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:33,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:33,985 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:33,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:33,987 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:33,989 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:33,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:33,992 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:34,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2024-11-09 15:18:34,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,005 INFO L229 MonitoredProcess]: Starting monitored process 7 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) [2024-11-09 15:18:34,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2024-11-09 15:18:34,009 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:34,019 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:34,019 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:34,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:34,019 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:34,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:34,020 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:34,020 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:34,025 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:34,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2024-11-09 15:18:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,037 INFO L229 MonitoredProcess]: Starting monitored process 8 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) [2024-11-09 15:18:34,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2024-11-09 15:18:34,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:34,050 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:34,050 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:34,050 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:34,050 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:34,050 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:34,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:34,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:34,054 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-09 15:18:34,056 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-09 15:18:34,057 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-09 15:18:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,059 INFO L229 MonitoredProcess]: Starting monitored process 9 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) [2024-11-09 15:18:34,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2024-11-09 15:18:34,061 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-09 15:18:34,061 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-09 15:18:34,065 INFO L474 LassoAnalysis]: Proved termination. [2024-11-09 15:18:34,066 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2024-11-09 15:18:34,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2024-11-09 15:18:34,083 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-09 15:18:34,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 15:18:34,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 15:18:34,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:18:34,205 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2024-11-09 15:18:34,206 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 15:18:34,273 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6). Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 37 states and 45 transitions. Complement of second has 16 states. [2024-11-09 15:18:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-09 15:18:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 15:18:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 8 transitions. [2024-11-09 15:18:34,282 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2024-11-09 15:18:34,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2024-11-09 15:18:34,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2024-11-09 15:18:34,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,284 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 45 transitions. [2024-11-09 15:18:34,287 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:34,291 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 24 states and 31 transitions. [2024-11-09 15:18:34,292 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2024-11-09 15:18:34,292 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2024-11-09 15:18:34,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 31 transitions. [2024-11-09 15:18:34,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-09 15:18:34,293 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-09 15:18:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 31 transitions. [2024-11-09 15:18:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2024-11-09 15:18:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 15:18:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-09 15:18:34,312 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-09 15:18:34,312 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-09 15:18:34,312 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-09 15:18:34,312 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2024-11-09 15:18:34,313 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:34,313 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-09 15:18:34,313 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-09 15:18:34,314 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 15:18:34,314 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-09 15:18:34,314 INFO L745 eck$LassoCheckResult]: Stem: 135#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 133#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 118#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 126#$Ultimate##0 ~j := #in~j; 127#L18 assume !(~j <= 0); 117#L20 call #t~ret3 := rec2(~j - 1);< 128#$Ultimate##0 ~j := #in~j; 129#L18 assume ~j <= 0;#res := 0; 124#rec2FINAL assume true; 125#rec2EXIT >#34#return; 116#L20-1 call #t~ret4 := rec1(#t~ret3);< 119#$Ultimate##0 [2024-11-09 15:18:34,314 INFO L747 eck$LassoCheckResult]: Loop: 119#$Ultimate##0 ~i := #in~i; 123#L12 assume !(~i <= 0); 122#L14 call #t~ret0 := rec1(~i - 2);< 119#$Ultimate##0 [2024-11-09 15:18:34,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1193590059, now seen corresponding path program 1 times [2024-11-09 15:18:34,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533401390] [2024-11-09 15:18:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:34,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2024-11-09 15:18:34,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778209289] [2024-11-09 15:18:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:34,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash -207203934, now seen corresponding path program 1 times [2024-11-09 15:18:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742400098] [2024-11-09 15:18:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-09 15:18:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 15:18:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:18:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742400098] [2024-11-09 15:18:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742400098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 15:18:34,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 15:18:34,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 15:18:34,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019501026] [2024-11-09 15:18:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 15:18:34,448 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:34,449 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:34,449 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:34,449 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:34,449 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-09 15:18:34,449 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,449 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:34,449 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:34,449 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2024-11-09 15:18:34,449 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:34,449 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:34,451 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,453 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,458 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,460 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,461 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,463 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,487 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:34,487 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-09 15:18:34,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,489 INFO L229 MonitoredProcess]: Starting monitored process 10 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) [2024-11-09 15:18:34,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2024-11-09 15:18:34,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:34,493 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:34,508 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:34,508 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:34,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2024-11-09 15:18:34,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,523 INFO L229 MonitoredProcess]: Starting monitored process 11 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) [2024-11-09 15:18:34,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2024-11-09 15:18:34,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:34,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:34,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,552 INFO L229 MonitoredProcess]: Starting monitored process 12 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) [2024-11-09 15:18:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2024-11-09 15:18:34,554 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-09 15:18:34,554 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:34,597 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-09 15:18:34,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:34,606 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:34,606 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:34,606 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:34,606 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:34,606 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-09 15:18:34,606 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,606 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:34,606 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:34,606 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2024-11-09 15:18:34,606 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:34,606 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:34,608 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,616 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,618 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,620 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,621 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,623 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:34,645 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:34,646 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-09 15:18:34,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,647 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2024-11-09 15:18:34,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2024-11-09 15:18:34,649 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:34,659 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:34,659 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:34,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:34,659 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:34,659 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:34,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:34,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:34,662 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-09 15:18:34,664 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-09 15:18:34,664 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-09 15:18:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:34,666 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2024-11-09 15:18:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2024-11-09 15:18:34,668 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-09 15:18:34,668 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-09 15:18:34,668 INFO L474 LassoAnalysis]: Proved termination. [2024-11-09 15:18:34,668 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-09 15:18:34,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:34,679 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-09 15:18:34,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 15:18:34,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:34,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 15:18:34,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:18:34,816 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-09 15:18:34,816 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 15:18:34,885 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 44 states and 59 transitions. Complement of second has 18 states. [2024-11-09 15:18:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-09 15:18:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 15:18:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 15 transitions. [2024-11-09 15:18:34,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 15 transitions. Stem has 11 letters. Loop has 3 letters. [2024-11-09 15:18:34,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 15 transitions. Stem has 14 letters. Loop has 3 letters. [2024-11-09 15:18:34,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 15 transitions. Stem has 11 letters. Loop has 6 letters. [2024-11-09 15:18:34,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:34,888 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 59 transitions. [2024-11-09 15:18:34,890 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:34,891 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 38 states and 51 transitions. [2024-11-09 15:18:34,892 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2024-11-09 15:18:34,892 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2024-11-09 15:18:34,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 51 transitions. [2024-11-09 15:18:34,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-09 15:18:34,892 INFO L218 hiAutomatonCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-11-09 15:18:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 51 transitions. [2024-11-09 15:18:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-09 15:18:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 15:18:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-09 15:18:34,896 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-09 15:18:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:18:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 15:18:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 15:18:34,899 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 15:18:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 15:18:34,929 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-09 15:18:34,929 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2024-11-09 15:18:34,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:34,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 30 states and 36 transitions. [2024-11-09 15:18:34,931 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2024-11-09 15:18:34,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2024-11-09 15:18:34,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 36 transitions. [2024-11-09 15:18:34,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-09 15:18:34,932 INFO L218 hiAutomatonCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-09 15:18:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 36 transitions. [2024-11-09 15:18:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-09 15:18:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 15:18:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-09 15:18:34,935 INFO L240 hiAutomatonCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-09 15:18:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 15:18:34,936 INFO L425 stractBuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-09 15:18:34,936 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-09 15:18:34,936 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2024-11-09 15:18:34,937 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:34,937 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-09 15:18:34,937 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-09 15:18:34,938 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 15:18:34,938 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-09 15:18:34,938 INFO L745 eck$LassoCheckResult]: Stem: 367#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 363#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 347#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 350#$Ultimate##0 ~j := #in~j; 351#L18 assume !(~j <= 0); 342#L20 call #t~ret3 := rec2(~j - 1);< 352#$Ultimate##0 ~j := #in~j; 353#L18 assume !(~j <= 0); 343#L20 call #t~ret3 := rec2(~j - 1);< 352#$Ultimate##0 ~j := #in~j; 354#L18 assume ~j <= 0;#res := 0; 366#rec2FINAL assume true; 349#rec2EXIT >#34#return; 341#L20-1 call #t~ret4 := rec1(#t~ret3);< 344#$Ultimate##0 ~i := #in~i; 345#L12 assume ~i <= 0;#res := 0; 364#rec1FINAL assume true; 365#rec1EXIT >#36#return; 355#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 346#rec2FINAL assume true; 348#rec2EXIT >#34#return; 358#L20-1 call #t~ret4 := rec1(#t~ret3);< 362#$Ultimate##0 [2024-11-09 15:18:34,938 INFO L747 eck$LassoCheckResult]: Loop: 362#$Ultimate##0 ~i := #in~i; 369#L12 assume !(~i <= 0); 360#L14 call #t~ret0 := rec1(~i - 2);< 362#$Ultimate##0 [2024-11-09 15:18:34,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1665524430, now seen corresponding path program 1 times [2024-11-09 15:18:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136507542] [2024-11-09 15:18:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,947 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:34,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2024-11-09 15:18:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719657103] [2024-11-09 15:18:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 15:18:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 15:18:34,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 15:18:34,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2118876407, now seen corresponding path program 1 times [2024-11-09 15:18:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:18:34,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464849243] [2024-11-09 15:18:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:18:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:18:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-09 15:18:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2024-11-09 15:18:35,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 15:18:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-09 15:18:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2024-11-09 15:18:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 15:18:35,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:18:35,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464849243] [2024-11-09 15:18:35,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464849243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 15:18:35,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 15:18:35,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 15:18:35,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924061716] [2024-11-09 15:18:35,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 15:18:35,180 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:35,180 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:35,181 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:35,181 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:35,181 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-09 15:18:35,181 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,181 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:35,181 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:35,181 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2024-11-09 15:18:35,181 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:35,181 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:35,182 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,183 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,185 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,186 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,188 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,189 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,218 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:35,219 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-09 15:18:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,220 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2024-11-09 15:18:35,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2024-11-09 15:18:35,222 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,222 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,234 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:35,234 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:35,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2024-11-09 15:18:35,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,246 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2024-11-09 15:18:35,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2024-11-09 15:18:35,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,248 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,260 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:35,260 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:35,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,272 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2024-11-09 15:18:35,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2024-11-09 15:18:35,274 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,274 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,285 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:35,285 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:35,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,298 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2024-11-09 15:18:35,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2024-11-09 15:18:35,300 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,300 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,311 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:35,311 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:35,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2024-11-09 15:18:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,328 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2024-11-09 15:18:35,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2024-11-09 15:18:35,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,329 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,340 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-09 15:18:35,340 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-09 15:18:35,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2024-11-09 15:18:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,353 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2024-11-09 15:18:35,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2024-11-09 15:18:35,356 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-09 15:18:35,356 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2024-11-09 15:18:35,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,384 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2024-11-09 15:18:35,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2024-11-09 15:18:35,388 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-09 15:18:35,388 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-09 15:18:35,431 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-09 15:18:35,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,435 INFO L204 LassoAnalysis]: Preferences: [2024-11-09 15:18:35,436 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-09 15:18:35,436 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-09 15:18:35,436 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-09 15:18:35,436 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-09 15:18:35,436 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,436 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-09 15:18:35,436 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-09 15:18:35,436 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2024-11-09 15:18:35,436 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-09 15:18:35,436 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-09 15:18:35,437 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,441 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,447 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,449 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,451 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,455 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-09 15:18:35,485 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-09 15:18:35,485 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-09 15:18:35,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,486 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2024-11-09 15:18:35,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2024-11-09 15:18:35,488 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:35,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:35,498 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:35,498 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:35,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:35,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:35,499 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:35,499 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:35,500 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:35,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2024-11-09 15:18:35,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,511 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2024-11-09 15:18:35,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2024-11-09 15:18:35,513 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:35,523 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:35,523 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:35,523 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:35,523 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:35,523 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:35,524 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:35,524 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:35,525 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:35,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,542 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2024-11-09 15:18:35,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2024-11-09 15:18:35,547 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:35,557 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:35,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:35,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:35,557 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:35,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:35,558 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:35,558 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:35,559 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:35,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,572 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2024-11-09 15:18:35,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2024-11-09 15:18:35,574 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:35,584 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:35,584 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:35,584 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:35,584 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:35,584 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:35,584 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:35,585 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:35,588 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-09 15:18:35,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,603 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2024-11-09 15:18:35,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2024-11-09 15:18:35,605 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-09 15:18:35,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-09 15:18:35,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-09 15:18:35,615 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-09 15:18:35,615 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-09 15:18:35,615 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-09 15:18:35,616 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-09 15:18:35,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-09 15:18:35,622 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-09 15:18:35,624 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-09 15:18:35,624 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-09 15:18:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-09 15:18:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:18:35,626 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2024-11-09 15:18:35,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2024-11-09 15:18:35,628 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-09 15:18:35,628 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-09 15:18:35,628 INFO L474 LassoAnalysis]: Proved termination. [2024-11-09 15:18:35,628 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-09 15:18:35,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:35,641 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-09 15:18:35,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 15:18:35,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 15:18:35,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:18:35,867 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-09 15:18:35,867 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:35,916 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 9 states. [2024-11-09 15:18:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2024-11-09 15:18:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2024-11-09 15:18:35,919 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2024-11-09 15:18:35,919 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:35,919 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-09 15:18:35,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:35,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 15:18:35,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:36,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 15:18:36,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:18:36,115 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-09 15:18:36,115 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:36,153 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 9 states. [2024-11-09 15:18:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2024-11-09 15:18:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2024-11-09 15:18:36,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2024-11-09 15:18:36,155 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:36,155 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-09 15:18:36,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:18:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:36,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 15:18:36,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:18:36,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 15:18:36,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:18:36,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2024-11-09 15:18:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:18:36,377 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-09 15:18:36,377 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:36,463 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 54 states and 66 transitions. Complement of second has 17 states. [2024-11-09 15:18:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-09 15:18:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 15:18:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 29 transitions. [2024-11-09 15:18:36,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 22 letters. Loop has 3 letters. [2024-11-09 15:18:36,464 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:36,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 25 letters. Loop has 3 letters. [2024-11-09 15:18:36,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:36,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 22 letters. Loop has 6 letters. [2024-11-09 15:18:36,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-09 15:18:36,465 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 66 transitions. [2024-11-09 15:18:36,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-09 15:18:36,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 42 states and 53 transitions. [2024-11-09 15:18:36,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2024-11-09 15:18:36,467 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2024-11-09 15:18:36,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 53 transitions. [2024-11-09 15:18:36,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-09 15:18:36,467 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-11-09 15:18:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 53 transitions. [2024-11-09 15:18:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-11-09 15:18:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 15:18:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-11-09 15:18:36,470 INFO L240 hiAutomatonCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-11-09 15:18:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:18:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 15:18:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 15:18:36,471 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 15:18:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 15:18:36,516 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-09 15:18:36,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 30 transitions. [2024-11-09 15:18:36,517 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-09 15:18:36,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 0 states and 0 transitions. [2024-11-09 15:18:36,517 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-09 15:18:36,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-09 15:18:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-09 15:18:36,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-09 15:18:36,517 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 15:18:36,518 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 15:18:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 15:18:36,518 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 15:18:36,518 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-09 15:18:36,518 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-09 15:18:36,518 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-09 15:18:36,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-09 15:18:36,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.11 03:18:36 BoogieIcfgContainer [2024-11-09 15:18:36,524 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-09 15:18:36,525 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 15:18:36,525 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 15:18:36,525 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 15:18:36,525 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 03:18:33" (3/4) ... [2024-11-09 15:18:36,527 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 15:18:36,528 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 15:18:36,528 INFO L158 Benchmark]: Toolchain (without parser) took 3719.09ms. Allocated memory was 211.8MB in the beginning and 316.7MB in the end (delta: 104.9MB). Free memory was 142.2MB in the beginning and 270.4MB in the end (delta: -128.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 15:18:36,528 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 211.8MB. Free memory is still 169.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 15:18:36,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.61ms. Allocated memory is still 211.8MB. Free memory was 142.0MB in the beginning and 130.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-09 15:18:36,529 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.00ms. Allocated memory is still 211.8MB. Free memory was 130.9MB in the beginning and 129.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 15:18:36,529 INFO L158 Benchmark]: Boogie Preprocessor took 23.70ms. Allocated memory is still 211.8MB. Free memory was 129.7MB in the beginning and 128.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 15:18:36,529 INFO L158 Benchmark]: RCFGBuilder took 287.45ms. Allocated memory is still 211.8MB. Free memory was 128.2MB in the beginning and 178.5MB in the end (delta: -50.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2024-11-09 15:18:36,530 INFO L158 Benchmark]: BuchiAutomizer took 3172.96ms. Allocated memory was 211.8MB in the beginning and 316.7MB in the end (delta: 104.9MB). Free memory was 178.5MB in the beginning and 270.4MB in the end (delta: -91.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2024-11-09 15:18:36,530 INFO L158 Benchmark]: Witness Printer took 2.95ms. Allocated memory is still 316.7MB. Free memory is still 270.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 15:18:36,531 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 211.8MB. Free memory is still 169.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.61ms. Allocated memory is still 211.8MB. Free memory was 142.0MB in the beginning and 130.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.00ms. Allocated memory is still 211.8MB. Free memory was 130.9MB in the beginning and 129.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.70ms. Allocated memory is still 211.8MB. Free memory was 129.7MB in the beginning and 128.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 287.45ms. Allocated memory is still 211.8MB. Free memory was 128.2MB in the beginning and 178.5MB in the end (delta: -50.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * BuchiAutomizer took 3172.96ms. Allocated memory was 211.8MB in the beginning and 316.7MB in the end (delta: 104.9MB). Free memory was 178.5MB in the beginning and 270.4MB in the end (delta: -91.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 2.95ms. Allocated memory is still 316.7MB. Free memory is still 270.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 5 locations. One deterministic module has affine ranking function \old(i) and consists of 6 locations. One nondeterministic module has affine ranking function \old(i) and consists of 6 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.1s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 1.7s. Construction of modules took 0.1s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 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 [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 91 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 84 mSDsluCounter, 283 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 189 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 132 IncrementalHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 94 mSDtfsCounter, 132 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf94 smp100 dnf100 smp100 tf112 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-11-09 15:18:36,551 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 Result: TRUE