./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3289d67d 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/recursive-simple/fibo_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 08:49:52,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 08:49:52,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-17 08:49:52,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 08:49:52,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 08:49:52,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder.Remove goto edges from RCFG [2024-11-17 08:49:52,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 08:49:52,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 08:49:52,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 08:49:52,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 08:49:52,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 08:49:52,950 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 08:49:52,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 08:49:52,951 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 08:49:52,951 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-17 08:49:52,952 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-17 08:49:52,952 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-17 08:49:52,956 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-17 08:49:52,956 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-17 08:49:52,957 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-17 08:49:52,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 08:49:52,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-17 08:49:52,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 08:49:52,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 08:49:52,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 08:49:52,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 08:49:52,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-17 08:49:52,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-17 08:49:52,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-17 08:49:52,961 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 08:49:52,962 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 08:49:52,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 08:49:52,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 08:49:52,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 08:49:52,964 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-17 08:49:52,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 [2024-11-17 08:49:53,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 08:49:53,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 08:49:53,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 08:49:53,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 08:49:53,263 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 08:49:53,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2024-11-17 08:49:54,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 08:49:54,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 08:49:54,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2024-11-17 08:49:54,925 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5479af768/d6c12d0b7e4a4c0a847505b605390475/FLAG2bcc61440 [2024-11-17 08:49:55,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5479af768/d6c12d0b7e4a4c0a847505b605390475 [2024-11-17 08:49:55,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 08:49:55,294 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 08:49:55,295 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 08:49:55,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 08:49:55,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 08:49:55,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c370de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55, skipping insertion in model container [2024-11-17 08:49:55,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,323 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 08:49:55,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 08:49:55,503 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 08:49:55,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 08:49:55,532 INFO L204 MainTranslator]: Completed translation [2024-11-17 08:49:55,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55 WrapperNode [2024-11-17 08:49:55,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 08:49:55,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 08:49:55,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 08:49:55,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 08:49:55,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,567 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2024-11-17 08:49:55,568 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 08:49:55,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 08:49:55,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 08:49:55,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 08:49:55,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,578 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,587 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-17 08:49:55,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,590 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 08:49:55,597 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 08:49:55,597 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 08:49:55,597 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 08:49:55,598 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (1/1) ... [2024-11-17 08:49:55,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,630 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) [2024-11-17 08:49:55,632 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 [2024-11-17 08:49:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 08:49:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 08:49:55,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 08:49:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 08:49:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-17 08:49:55,677 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-17 08:49:55,739 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 08:49:55,741 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 08:49:55,848 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2024-11-17 08:49:55,856 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-17 08:49:55,856 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 08:49:55,874 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 08:49:55,874 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 08:49:55,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:55 BoogieIcfgContainer [2024-11-17 08:49:55,875 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 08:49:55,876 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-17 08:49:55,876 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-17 08:49:55,879 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-17 08:49:55,879 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:55,880 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 17.11 08:49:55" (1/3) ... [2024-11-17 08:49:55,880 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@33aabe66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 17.11 08:49:55, skipping insertion in model container [2024-11-17 08:49:55,880 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:55,881 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:55" (2/3) ... [2024-11-17 08:49:55,881 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@33aabe66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 17.11 08:49:55, skipping insertion in model container [2024-11-17 08:49:55,881 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:55,881 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:55" (3/3) ... [2024-11-17 08:49:55,882 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2024-11-17 08:49:55,932 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-17 08:49:55,932 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-17 08:49:55,932 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-17 08:49:55,933 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-17 08:49:55,933 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-17 08:49:55,933 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-17 08:49:55,933 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-17 08:49:55,933 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-17 08:49:55,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-17 08:49:55,955 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:55,955 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:55,955 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:55,960 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-17 08:49:55,961 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-17 08:49:55,961 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-17 08:49:55,961 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-17 08:49:55,963 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:55,963 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:55,963 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:55,963 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-17 08:49:55,963 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-17 08:49:55,967 INFO L745 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 12#ULTIMATE.init_returnLabel#1true assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 18#L27-1true call main_#t~ret6#1 := fibo(main_~x~0#1);< 7#fiboENTRYtrue [2024-11-17 08:49:55,968 INFO L747 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 9#L10true assume !(1 == ~n); 19#L13-3true call #t~ret4 := fibo(~n - 1);< 7#fiboENTRYtrue [2024-11-17 08:49:55,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 39702, now seen corresponding path program 1 times [2024-11-17 08:49:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:55,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024456801] [2024-11-17 08:49:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,062 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:56,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1538184, now seen corresponding path program 1 times [2024-11-17 08:49:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:56,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812894870] [2024-11-17 08:49:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:56,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1988460259, now seen corresponding path program 1 times [2024-11-17 08:49:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:56,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725087511] [2024-11-17 08:49:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,146 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:56,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:56,301 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:56,302 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:56,302 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:56,302 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:56,302 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:49:56,302 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,303 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:56,303 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:56,303 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2024-11-17 08:49:56,303 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:56,303 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:56,317 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,326 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,335 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,338 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,422 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:56,423 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:49:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,431 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) [2024-11-17 08:49:56,432 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 [2024-11-17 08:49:56,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:56,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,452 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:56,452 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:56,463 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 [2024-11-17 08:49:56,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,466 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) [2024-11-17 08:49:56,468 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 [2024-11-17 08:49:56,469 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:56,470 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,482 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:56,482 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:56,495 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 [2024-11-17 08:49:56,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,497 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) [2024-11-17 08:49:56,498 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 [2024-11-17 08:49:56,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:56,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,510 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:56,511 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:56,521 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 [2024-11-17 08:49:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,523 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) [2024-11-17 08:49:56,524 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 [2024-11-17 08:49:56,525 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:56,526 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,540 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:56,541 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:56,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,558 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) [2024-11-17 08:49:56,559 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 [2024-11-17 08:49:56,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:56,561 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,590 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) [2024-11-17 08:49:56,592 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 [2024-11-17 08:49:56,593 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:49:56,593 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,664 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:49:56,669 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 [2024-11-17 08:49:56,670 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:56,670 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:56,670 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:56,670 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:56,671 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:49:56,671 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,671 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:56,671 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:56,671 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2024-11-17 08:49:56,671 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:56,671 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:56,673 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,675 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,678 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,681 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,684 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,745 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:56,751 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:49:56,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,753 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) [2024-11-17 08:49:56,754 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 [2024-11-17 08:49:56,755 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 [2024-11-17 08:49:56,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,768 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,768 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,770 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,782 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 [2024-11-17 08:49:56,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,785 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) [2024-11-17 08:49:56,786 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 [2024-11-17 08:49:56,787 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 [2024-11-17 08:49:56,797 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,797 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,798 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,798 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,798 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,798 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,800 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,814 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) [2024-11-17 08:49:56,816 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 [2024-11-17 08:49:56,816 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 [2024-11-17 08:49:56,829 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,830 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,830 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,830 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,831 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,831 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,833 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,851 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) [2024-11-17 08:49:56,852 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 [2024-11-17 08:49:56,854 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 [2024-11-17 08:49:56,866 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,867 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,867 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,867 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,868 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,868 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,868 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,871 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2024-11-17 08:49:56,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,888 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) [2024-11-17 08:49:56,888 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 [2024-11-17 08:49:56,889 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 [2024-11-17 08:49:56,899 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,899 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,899 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,899 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,900 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,900 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,904 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:49:56,908 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:49:56,909 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:49:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,932 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) [2024-11-17 08:49:56,933 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 [2024-11-17 08:49:56,934 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:49:56,934 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:49:56,934 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:49:56,934 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-17 08:49:56,944 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 [2024-11-17 08:49:56,947 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:49:56,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:56,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 08:49:56,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:57,113 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 [2024-11-17 08:49:57,116 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 08:49:57,222 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 41 states and 54 transitions. Complement of second has 16 states. [2024-11-17 08:49:57,227 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 [2024-11-17 08:49:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 08:49:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2024-11-17 08:49:57,236 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 4 letters. [2024-11-17 08:49:57,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 7 letters. Loop has 4 letters. [2024-11-17 08:49:57,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 8 letters. [2024-11-17 08:49:57,238 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,238 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 54 transitions. [2024-11-17 08:49:57,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:57,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 23 states and 31 transitions. [2024-11-17 08:49:57,251 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2024-11-17 08:49:57,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-11-17 08:49:57,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 31 transitions. [2024-11-17 08:49:57,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:57,253 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-17 08:49:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 31 transitions. [2024-11-17 08:49:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-17 08:49:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 08:49:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-17 08:49:57,279 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-17 08:49:57,279 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-17 08:49:57,279 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-17 08:49:57,279 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2024-11-17 08:49:57,280 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:57,280 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:57,280 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:57,281 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:57,281 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:57,282 INFO L745 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 121#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 124#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 129#fiboENTRY ~n := #in~n; 130#L8 assume !(~n < 1); 134#L10 assume !(1 == ~n); 123#L13-3 call #t~ret4 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 132#L8 assume ~n < 1;#res := 0; 127#fiboFINAL assume true; 128#fiboEXIT >#27#return; 122#L13-2 [2024-11-17 08:49:57,282 INFO L747 eck$LassoCheckResult]: Loop: 122#L13-2 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 139#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 125#L13-3 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 139#L8 assume ~n < 1;#res := 0; 136#fiboFINAL assume true; 137#fiboEXIT >#27#return; 122#L13-2 [2024-11-17 08:49:57,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1475604923, now seen corresponding path program 1 times [2024-11-17 08:49:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719309125] [2024-11-17 08:49:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2024-11-17 08:49:57,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-17 08:49:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 08:49:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719309125] [2024-11-17 08:49:57,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719309125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 08:49:57,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 08:49:57,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 08:49:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457419935] [2024-11-17 08:49:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 08:49:57,495 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:49:57,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash 93365724, now seen corresponding path program 1 times [2024-11-17 08:49:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298754393] [2024-11-17 08:49:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-17 08:49:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 08:49:57,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298754393] [2024-11-17 08:49:57,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298754393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 08:49:57,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 08:49:57,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 08:49:57,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302543853] [2024-11-17 08:49:57,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 08:49:57,591 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-17 08:49:57,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 08:49:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 08:49:57,597 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-17 08:49:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:57,680 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-17 08:49:57,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2024-11-17 08:49:57,681 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:57,682 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2024-11-17 08:49:57,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-11-17 08:49:57,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-11-17 08:49:57,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2024-11-17 08:49:57,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:57,685 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2024-11-17 08:49:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-17 08:49:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-17 08:49:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-17 08:49:57,693 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 08:49:57,694 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:57,694 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-17 08:49:57,694 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2024-11-17 08:49:57,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:57,695 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:57,696 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:57,696 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:57,696 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-17 08:49:57,697 INFO L745 eck$LassoCheckResult]: Stem: 191#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 192#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 193#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 208#fiboENTRY ~n := #in~n; 200#L8 assume !(~n < 1); 206#L10 assume !(1 == ~n); 196#L13-3 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 201#L8 assume !(~n < 1); 205#L10 assume 1 == ~n;#res := 1; 207#fiboFINAL assume true; 204#fiboEXIT >#27#return; 194#L13-2 [2024-11-17 08:49:57,697 INFO L747 eck$LassoCheckResult]: Loop: 194#L13-2 call #t~ret5 := fibo(~n - 2);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 195#L13-3 call #t~ret4 := fibo(~n - 1);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 195#L13-3 call #t~ret4 := fibo(~n - 1);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume 1 == ~n;#res := 1; 202#fiboFINAL assume true; 203#fiboEXIT >#27#return; 194#L13-2 call #t~ret5 := fibo(~n - 2);< 197#fiboENTRY ~n := #in~n; 198#L8 assume ~n < 1;#res := 0; 213#fiboFINAL assume true; 211#fiboEXIT >#25#return; 209#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 210#fiboFINAL assume true; 214#fiboEXIT >#27#return; 194#L13-2 [2024-11-17 08:49:57,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1500686953, now seen corresponding path program 1 times [2024-11-17 08:49:57,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:57,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730681289] [2024-11-17 08:49:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:57,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-17 08:49:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730681289] [2024-11-17 08:49:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730681289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:49:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690586941] [2024-11-17 08:49:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:49:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:57,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:49:57,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 08:49:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:57,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:49:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690586941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:49:58,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:49:58,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-17 08:49:58,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597680719] [2024-11-17 08:49:58,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:49:58,045 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:49:58,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 1 times [2024-11-17 08:49:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861604897] [2024-11-17 08:49:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:58,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:58,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:58,349 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:58,349 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:58,349 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:58,349 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:58,349 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:49:58,349 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:58,349 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:58,349 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:58,350 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2024-11-17 08:49:58,350 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:58,350 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:58,351 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:58,354 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:58,356 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:58,366 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:58,416 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:58,417 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:49:58,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:58,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:58,419 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) [2024-11-17 08:49:58,423 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 [2024-11-17 08:49:58,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:58,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:58,442 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:58,442 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:58,457 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 [2024-11-17 08:49:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:58,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:58,460 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) [2024-11-17 08:49:58,462 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 [2024-11-17 08:49:58,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:58,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:58,476 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:58,477 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:58,491 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 [2024-11-17 08:49:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:58,494 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) [2024-11-17 08:49:58,496 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 [2024-11-17 08:49:58,496 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:58,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:58,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2024-11-17 08:49:58,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:58,536 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) [2024-11-17 08:49:58,537 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 [2024-11-17 08:49:58,538 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:49:58,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:59,004 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:49:59,012 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 [2024-11-17 08:49:59,012 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:59,013 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:59,013 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:59,013 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:59,013 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:49:59,013 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:59,013 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:59,013 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:59,013 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2024-11-17 08:49:59,013 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:59,014 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:59,014 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:59,030 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:59,033 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:59,039 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:59,084 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:59,084 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:49:59,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:59,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:59,086 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) [2024-11-17 08:49:59,090 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 [2024-11-17 08:49:59,091 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 [2024-11-17 08:49:59,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:59,101 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:59,101 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:59,101 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:59,101 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:59,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:59,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:59,105 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:49:59,108 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:49:59,108 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:49:59,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:59,110 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) [2024-11-17 08:49:59,111 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 [2024-11-17 08:49:59,111 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:49:59,111 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:49:59,111 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:49:59,111 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-17 08:49:59,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:59,123 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:49:59,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:59,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:49:59,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:59,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:49:59,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:59,288 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 [2024-11-17 08:49:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:49:59,484 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:49:59,485 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 08:49:59,728 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 152 states and 210 transitions. Complement of second has 54 states. [2024-11-17 08:49:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 08:49:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 40 transitions. [2024-11-17 08:49:59,733 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 22 letters. [2024-11-17 08:49:59,734 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:59,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 34 letters. Loop has 22 letters. [2024-11-17 08:49:59,734 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:59,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 44 letters. [2024-11-17 08:49:59,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:59,736 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 152 states and 210 transitions. [2024-11-17 08:49:59,742 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:59,747 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 152 states to 125 states and 179 transitions. [2024-11-17 08:49:59,747 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 72 [2024-11-17 08:49:59,747 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2024-11-17 08:49:59,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 179 transitions. [2024-11-17 08:49:59,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:59,748 INFO L218 hiAutomatonCegarLoop]: Abstraction has 125 states and 179 transitions. [2024-11-17 08:49:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states and 179 transitions. [2024-11-17 08:49:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2024-11-17 08:49:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (35), 22 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-17 08:49:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2024-11-17 08:49:59,761 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 142 transitions. [2024-11-17 08:49:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 08:49:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-17 08:49:59,762 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-17 08:49:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:59,877 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2024-11-17 08:49:59,877 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2024-11-17 08:49:59,881 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:59,885 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 130 states and 178 transitions. [2024-11-17 08:49:59,885 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2024-11-17 08:49:59,885 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 81 [2024-11-17 08:49:59,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 178 transitions. [2024-11-17 08:49:59,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:59,886 INFO L218 hiAutomatonCegarLoop]: Abstraction has 130 states and 178 transitions. [2024-11-17 08:49:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states and 178 transitions. [2024-11-17 08:49:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2024-11-17 08:49:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 78 states have internal predecessors, (89), 28 states have call successors, (29), 15 states have call predecessors, (29), 16 states have return successors, (39), 24 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-17 08:49:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2024-11-17 08:49:59,897 INFO L240 hiAutomatonCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-17 08:49:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 08:49:59,898 INFO L425 stractBuchiCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-17 08:49:59,898 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-17 08:49:59,898 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 157 transitions. [2024-11-17 08:49:59,900 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:59,900 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:59,900 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:59,901 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:59,901 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1] [2024-11-17 08:49:59,902 INFO L745 eck$LassoCheckResult]: Stem: 881#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 882#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 884#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 916#fiboENTRY ~n := #in~n; 950#L8 assume !(~n < 1); 949#L10 assume !(1 == ~n); 894#L13-3 call #t~ret4 := fibo(~n - 1);< 893#fiboENTRY ~n := #in~n; 895#L8 assume !(~n < 1); 908#L10 assume !(1 == ~n); 915#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 948#L8 assume !(~n < 1); 946#L10 assume 1 == ~n;#res := 1; 944#fiboFINAL assume true; 942#fiboEXIT >#27#return; 887#L13-2 call #t~ret5 := fibo(~n - 2);< 941#fiboENTRY ~n := #in~n; 996#L8 assume ~n < 1;#res := 0; 995#fiboFINAL assume true; 994#fiboEXIT >#25#return; 992#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 989#fiboFINAL assume true; 979#fiboEXIT >#27#return; 912#L13-2 [2024-11-17 08:49:59,902 INFO L747 eck$LassoCheckResult]: Loop: 912#L13-2 call #t~ret5 := fibo(~n - 2);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume !(1 == ~n); 911#L13-3 call #t~ret4 := fibo(~n - 1);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume !(1 == ~n); 911#L13-3 call #t~ret4 := fibo(~n - 1);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 914#fiboFINAL assume true; 983#fiboEXIT >#27#return; 912#L13-2 call #t~ret5 := fibo(~n - 2);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 914#fiboFINAL assume true; 983#fiboEXIT >#25#return; 981#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 988#fiboFINAL assume true; 980#fiboEXIT >#27#return; 912#L13-2 [2024-11-17 08:49:59,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 1 times [2024-11-17 08:49:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:59,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90897471] [2024-11-17 08:49:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:59,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 08:50:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:50:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:50:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-17 08:50:00,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:50:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90897471] [2024-11-17 08:50:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90897471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:50:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041868994] [2024-11-17 08:50:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:00,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:50:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:00,159 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:50:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 08:50:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 08:50:00,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-17 08:50:00,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:50:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 08:50:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041868994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:50:00,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:50:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2024-11-17 08:50:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525883473] [2024-11-17 08:50:00,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:50:00,488 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:50:00,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1547808212, now seen corresponding path program 1 times [2024-11-17 08:50:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:50:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307531610] [2024-11-17 08:50:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:50:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-17 08:50:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:50:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:50:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 08:50:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:50:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307531610] [2024-11-17 08:50:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307531610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:50:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981941933] [2024-11-17 08:50:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:50:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:00,602 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:50:00,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 08:50:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:00,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:50:00,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 08:50:00,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:50:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 08:50:00,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981941933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:50:00,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:50:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-17 08:50:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819841425] [2024-11-17 08:50:00,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:50:00,811 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-17 08:50:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:50:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 08:50:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 08:50:00,812 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. cyclomatic complexity: 44 Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:50:00,898 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-17 08:50:00,898 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 76 transitions. [2024-11-17 08:50:00,900 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:50:00,901 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 54 states and 70 transitions. [2024-11-17 08:50:00,901 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2024-11-17 08:50:00,901 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-17 08:50:00,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2024-11-17 08:50:00,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:50:00,901 INFO L218 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:50:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2024-11-17 08:50:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-17 08:50:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-17 08:50:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-17 08:50:00,910 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:50:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 08:50:00,914 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:50:00,914 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-17 08:50:00,914 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2024-11-17 08:50:00,915 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:50:00,915 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:50:00,915 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:50:00,916 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:50:00,916 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-17 08:50:00,917 INFO L745 eck$LassoCheckResult]: Stem: 1468#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1469#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 1476#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1495#fiboENTRY ~n := #in~n; 1504#L8 assume !(~n < 1); 1506#L10 assume !(1 == ~n); 1481#L13-3 call #t~ret4 := fibo(~n - 1);< 1480#fiboENTRY ~n := #in~n; 1482#L8 assume !(~n < 1); 1494#L10 assume !(1 == ~n); 1489#L13-3 call #t~ret4 := fibo(~n - 1);< 1498#fiboENTRY ~n := #in~n; 1488#L8 assume !(~n < 1); 1491#L10 assume !(1 == ~n); 1490#L13-3 call #t~ret4 := fibo(~n - 1);< 1498#fiboENTRY ~n := #in~n; 1488#L8 assume !(~n < 1); 1491#L10 assume !(1 == ~n); 1490#L13-3 call #t~ret4 := fibo(~n - 1);< 1498#fiboENTRY ~n := #in~n; 1505#L8 assume !(~n < 1); 1492#L10 assume 1 == ~n;#res := 1; 1493#fiboFINAL assume true; 1511#fiboEXIT >#27#return; 1478#L13-2 call #t~ret5 := fibo(~n - 2);< 1477#fiboENTRY ~n := #in~n; 1479#L8 assume ~n < 1;#res := 0; 1487#fiboFINAL assume true; 1485#fiboEXIT >#25#return; 1486#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1520#fiboFINAL assume true; 1517#fiboEXIT >#27#return; 1473#L13-2 [2024-11-17 08:50:00,917 INFO L747 eck$LassoCheckResult]: Loop: 1473#L13-2 call #t~ret5 := fibo(~n - 2);< 1497#fiboENTRY ~n := #in~n; 1502#L8 assume !(~n < 1); 1500#L10 assume !(1 == ~n); 1471#L13-3 call #t~ret4 := fibo(~n - 1);< 1497#fiboENTRY ~n := #in~n; 1502#L8 assume !(~n < 1); 1500#L10 assume !(1 == ~n); 1471#L13-3 call #t~ret4 := fibo(~n - 1);< 1497#fiboENTRY ~n := #in~n; 1502#L8 assume !(~n < 1); 1500#L10 assume 1 == ~n;#res := 1; 1501#fiboFINAL assume true; 1508#fiboEXIT >#27#return; 1470#L13-2 call #t~ret5 := fibo(~n - 2);< 1475#fiboENTRY ~n := #in~n; 1521#L8 assume ~n < 1;#res := 0; 1503#fiboFINAL assume true; 1516#fiboEXIT >#25#return; 1499#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1483#fiboFINAL assume true; 1484#fiboEXIT >#27#return; 1473#L13-2 [2024-11-17 08:50:00,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 2 times [2024-11-17 08:50:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:50:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079619250] [2024-11-17 08:50:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:50:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:01,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 08:50:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:01,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:50:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:01,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:50:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-17 08:50:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:50:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079619250] [2024-11-17 08:50:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079619250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:50:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230816563] [2024-11-17 08:50:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 08:50:01,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:50:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:50:01,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-17 08:50:01,185 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 08:50:01,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 08:50:01,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 08:50:01,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-17 08:50:01,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:50:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 08:50:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230816563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:50:01,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:50:01,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2024-11-17 08:50:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8339118] [2024-11-17 08:50:01,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:50:01,468 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:50:01,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 2 times [2024-11-17 08:50:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:50:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232132442] [2024-11-17 08:50:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:50:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:50:01,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:50:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:50:01,478 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:50:01,658 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:50:01,658 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:50:01,658 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:50:01,658 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:50:01,658 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:50:01,659 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,659 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:50:01,659 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:50:01,659 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2024-11-17 08:50:01,659 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:50:01,659 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:50:01,660 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,663 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,668 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,670 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,672 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,706 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:50:01,707 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:50:01,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,709 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) [2024-11-17 08:50:01,710 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 [2024-11-17 08:50:01,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:50:01,712 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:01,730 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:50:01,730 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:50:01,745 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 [2024-11-17 08:50:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,747 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) [2024-11-17 08:50:01,749 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 [2024-11-17 08:50:01,749 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:50:01,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:01,779 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 [2024-11-17 08:50:01,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,782 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) [2024-11-17 08:50:01,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:50:01,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:01,787 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 [2024-11-17 08:50:01,804 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:50:01,819 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 [2024-11-17 08:50:01,819 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:50:01,819 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:50:01,819 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:50:01,820 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:50:01,820 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:50:01,820 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,820 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:50:01,820 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:50:01,820 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2024-11-17 08:50:01,820 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:50:01,820 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:50:01,821 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,826 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,829 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,832 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,834 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:01,870 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:50:01,871 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:50:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,873 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) [2024-11-17 08:50:01,875 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 [2024-11-17 08:50:01,876 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 [2024-11-17 08:50:01,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:50:01,887 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:50:01,887 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:50:01,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:50:01,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:50:01,888 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:50:01,888 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:50:01,890 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:50:01,894 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:50:01,894 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:50:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:01,895 INFO L229 MonitoredProcess]: Starting monitored process 28 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) [2024-11-17 08:50:01,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2024-11-17 08:50:01,896 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:50:01,896 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:50:01,896 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:50:01,897 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-17 08:50:01,907 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 [2024-11-17 08:50:01,907 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:50:01,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:01,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:50:01,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:02,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:02,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:50:02,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:50:02,321 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:50:02,322 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:02,404 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 77 transitions. Complement of second has 11 states. [2024-11-17 08:50:02,405 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 [2024-11-17 08:50:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-17 08:50:02,406 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:50:02,406 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:02,406 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:50:02,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:02,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:50:02,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:02,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:50:02,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:50:02,789 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:50:02,789 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:02,879 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 77 transitions. Complement of second has 11 states. [2024-11-17 08:50:02,879 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 [2024-11-17 08:50:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-17 08:50:02,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:50:02,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:02,881 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:50:02,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:02,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:50:02,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:03,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:50:03,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:50:03,281 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 7 loop predicates [2024-11-17 08:50:03,281 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:03,551 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 408 states and 526 transitions. Complement of second has 132 states. [2024-11-17 08:50:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2024-11-17 08:50:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:50:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 45 transitions. [2024-11-17 08:50:03,554 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:50:03,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:03,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 54 letters. Loop has 22 letters. [2024-11-17 08:50:03,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:03,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 44 letters. [2024-11-17 08:50:03,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:03,559 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 526 transitions. [2024-11-17 08:50:03,567 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-17 08:50:03,574 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 259 states and 359 transitions. [2024-11-17 08:50:03,574 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2024-11-17 08:50:03,575 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2024-11-17 08:50:03,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 359 transitions. [2024-11-17 08:50:03,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:50:03,575 INFO L218 hiAutomatonCegarLoop]: Abstraction has 259 states and 359 transitions. [2024-11-17 08:50:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states and 359 transitions. [2024-11-17 08:50:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 187. [2024-11-17 08:50:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 122 states have internal predecessors, (131), 43 states have call successors, (48), 25 states have call predecessors, (48), 29 states have return successors, (67), 39 states have call predecessors, (67), 39 states have call successors, (67) [2024-11-17 08:50:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 246 transitions. [2024-11-17 08:50:03,599 INFO L240 hiAutomatonCegarLoop]: Abstraction has 187 states and 246 transitions. [2024-11-17 08:50:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:50:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 08:50:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-17 08:50:03,600 INFO L87 Difference]: Start difference. First operand 187 states and 246 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-17 08:50:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:50:03,791 INFO L93 Difference]: Finished difference Result 279 states and 369 transitions. [2024-11-17 08:50:03,791 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 279 states and 369 transitions. [2024-11-17 08:50:03,794 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-17 08:50:03,799 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 279 states to 269 states and 354 transitions. [2024-11-17 08:50:03,799 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2024-11-17 08:50:03,799 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2024-11-17 08:50:03,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 354 transitions. [2024-11-17 08:50:03,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:50:03,800 INFO L218 hiAutomatonCegarLoop]: Abstraction has 269 states and 354 transitions. [2024-11-17 08:50:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states and 354 transitions. [2024-11-17 08:50:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 242. [2024-11-17 08:50:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 148 states have (on average 1.114864864864865) internal successors, (165), 158 states have internal predecessors, (165), 55 states have call successors, (59), 30 states have call predecessors, (59), 39 states have return successors, (94), 53 states have call predecessors, (94), 49 states have call successors, (94) [2024-11-17 08:50:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2024-11-17 08:50:03,815 INFO L240 hiAutomatonCegarLoop]: Abstraction has 242 states and 318 transitions. [2024-11-17 08:50:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 08:50:03,816 INFO L425 stractBuchiCegarLoop]: Abstraction has 242 states and 318 transitions. [2024-11-17 08:50:03,816 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-17 08:50:03,817 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 242 states and 318 transitions. [2024-11-17 08:50:03,818 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-17 08:50:03,818 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:50:03,818 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:50:03,820 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:50:03,820 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-17 08:50:03,820 INFO L745 eck$LassoCheckResult]: Stem: 3457#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 3458#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 3459#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 3500#fiboENTRY ~n := #in~n; 3528#L8 assume !(~n < 1); 3527#L10 assume !(1 == ~n); 3523#L13-3 call #t~ret4 := fibo(~n - 1);< 3526#fiboENTRY ~n := #in~n; 3525#L8 assume !(~n < 1); 3524#L10 assume !(1 == ~n); 3519#L13-3 call #t~ret4 := fibo(~n - 1);< 3522#fiboENTRY ~n := #in~n; 3521#L8 assume !(~n < 1); 3520#L10 assume !(1 == ~n); 3514#L13-3 call #t~ret4 := fibo(~n - 1);< 3518#fiboENTRY ~n := #in~n; 3516#L8 assume !(~n < 1); 3517#L10 assume !(1 == ~n); 3511#L13-3 call #t~ret4 := fibo(~n - 1);< 3509#fiboENTRY ~n := #in~n; 3512#L8 assume !(~n < 1); 3515#L10 assume !(1 == ~n); 3510#L13-3 call #t~ret4 := fibo(~n - 1);< 3509#fiboENTRY ~n := #in~n; 3512#L8 assume !(~n < 1); 3515#L10 assume !(1 == ~n); 3510#L13-3 call #t~ret4 := fibo(~n - 1);< 3509#fiboENTRY ~n := #in~n; 3513#L8 assume !(~n < 1); 3636#L10 assume 1 == ~n;#res := 1; 3635#fiboFINAL assume true; 3633#fiboEXIT >#27#return; 3630#L13-2 call #t~ret5 := fibo(~n - 2);< 3631#fiboENTRY ~n := #in~n; 3634#L8 assume ~n < 1;#res := 0; 3632#fiboFINAL assume true; 3629#fiboEXIT >#25#return; 3627#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3607#fiboFINAL assume true; 3582#fiboEXIT >#27#return; 3569#L13-2 call #t~ret5 := fibo(~n - 2);< 3578#fiboENTRY ~n := #in~n; 3647#L8 assume !(~n < 1); 3648#L10 assume !(1 == ~n); 3652#L13-3 call #t~ret4 := fibo(~n - 1);< 3503#fiboENTRY ~n := #in~n; 3677#L8 assume !(~n < 1); 3675#L10 assume !(1 == ~n); 3532#L13-3 call #t~ret4 := fibo(~n - 1);< 3535#fiboENTRY [2024-11-17 08:50:03,820 INFO L747 eck$LassoCheckResult]: Loop: 3535#fiboENTRY ~n := #in~n; 3550#L8 assume !(~n < 1); 3546#L10 assume !(1 == ~n); 3533#L13-3 call #t~ret4 := fibo(~n - 1);< 3535#fiboENTRY [2024-11-17 08:50:03,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1437432527, now seen corresponding path program 3 times [2024-11-17 08:50:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:50:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255891448] [2024-11-17 08:50:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:50:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-17 08:50:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:50:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:50:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 102 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 08:50:04,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:50:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255891448] [2024-11-17 08:50:04,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255891448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:50:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15461203] [2024-11-17 08:50:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 08:50:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:50:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,030 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:50:04,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-17 08:50:04,077 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-17 08:50:04,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 08:50:04,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 08:50:04,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 82 proven. 14 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-17 08:50:04,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:50:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 82 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-17 08:50:04,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15461203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:50:04,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:50:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 22 [2024-11-17 08:50:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501265030] [2024-11-17 08:50:04,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:50:04,366 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:50:04,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1538184, now seen corresponding path program 2 times [2024-11-17 08:50:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:50:04,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000022591] [2024-11-17 08:50:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:50:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:50:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:50:04,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:50:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:50:04,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:50:04,408 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:50:04,408 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:50:04,409 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:50:04,409 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:50:04,409 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:50:04,409 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,409 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:50:04,409 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:50:04,409 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2024-11-17 08:50:04,409 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:50:04,409 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:50:04,410 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,412 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,418 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,420 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,421 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,449 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:50:04,449 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:50:04,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,451 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2024-11-17 08:50:04,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2024-11-17 08:50:04,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:50:04,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:04,468 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:50:04,468 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:50:04,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,480 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2024-11-17 08:50:04,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2024-11-17 08:50:04,481 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:50:04,481 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:04,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2024-11-17 08:50:04,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,508 INFO L229 MonitoredProcess]: Starting monitored process 32 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) [2024-11-17 08:50:04,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2024-11-17 08:50:04,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:50:04,510 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:50:04,562 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:50:04,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2024-11-17 08:50:04,567 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:50:04,567 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:50:04,567 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:50:04,567 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:50:04,568 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:50:04,568 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,568 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:50:04,568 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:50:04,568 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2024-11-17 08:50:04,568 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:50:04,568 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:50:04,569 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,571 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,575 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,581 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,582 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:50:04,616 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:50:04,617 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:50:04,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,620 INFO L229 MonitoredProcess]: Starting monitored process 33 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) [2024-11-17 08:50:04,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2024-11-17 08:50:04,622 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 [2024-11-17 08:50:04,635 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:50:04,635 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:50:04,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:50:04,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:50:04,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:50:04,639 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:50:04,639 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:50:04,641 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:50:04,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2024-11-17 08:50:04,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,658 INFO L229 MonitoredProcess]: Starting monitored process 34 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) [2024-11-17 08:50:04,660 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 [2024-11-17 08:50:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2024-11-17 08:50:04,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:50:04,673 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:50:04,673 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:50:04,673 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:50:04,673 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:50:04,674 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:50:04,674 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:50:04,676 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:50:04,680 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:50:04,680 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:50:04,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:50:04,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:50:04,683 INFO L229 MonitoredProcess]: Starting monitored process 35 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) [2024-11-17 08:50:04,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2024-11-17 08:50:04,685 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:50:04,685 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:50:04,685 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:50:04,685 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-17 08:50:04,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:04,701 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:50:04,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 08:50:04,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:04,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 08:50:04,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:50:04,974 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 [2024-11-17 08:50:04,974 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,027 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 258 states and 334 transitions. Complement of second has 15 states. [2024-11-17 08:50:05,029 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 [2024-11-17 08:50:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-17 08:50:05,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2024-11-17 08:50:05,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:05,030 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:50:05,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:05,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 08:50:05,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:05,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 08:50:05,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:50:05,292 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 [2024-11-17 08:50:05,293 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,350 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 258 states and 334 transitions. Complement of second has 15 states. [2024-11-17 08:50:05,350 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 [2024-11-17 08:50:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-17 08:50:05,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2024-11-17 08:50:05,351 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:05,351 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:50:05,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:50:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:05,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 08:50:05,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:50:05,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 08:50:05,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:50:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:50:05,619 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 [2024-11-17 08:50:05,619 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,694 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 242 states and 318 transitions. cyclomatic complexity: 80. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 317 states and 394 transitions. Complement of second has 19 states. [2024-11-17 08:50:05,696 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 [2024-11-17 08:50:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:50:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2024-11-17 08:50:05,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2024-11-17 08:50:05,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:05,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2024-11-17 08:50:05,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:05,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2024-11-17 08:50:05,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:50:05,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 317 states and 394 transitions. [2024-11-17 08:50:05,706 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-17 08:50:05,711 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 317 states to 254 states and 330 transitions. [2024-11-17 08:50:05,712 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 109 [2024-11-17 08:50:05,712 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 112 [2024-11-17 08:50:05,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 330 transitions. [2024-11-17 08:50:05,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:50:05,713 INFO L218 hiAutomatonCegarLoop]: Abstraction has 254 states and 330 transitions. [2024-11-17 08:50:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 330 transitions. [2024-11-17 08:50:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2024-11-17 08:50:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 156 states have (on average 1.108974358974359) internal successors, (173), 166 states have internal predecessors, (173), 55 states have call successors, (59), 30 states have call predecessors, (59), 39 states have return successors, (94), 53 states have call predecessors, (94), 49 states have call successors, (94) [2024-11-17 08:50:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 326 transitions. [2024-11-17 08:50:05,732 INFO L240 hiAutomatonCegarLoop]: Abstraction has 250 states and 326 transitions. [2024-11-17 08:50:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:50:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 08:50:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-11-17 08:50:05,733 INFO L87 Difference]: Start difference. First operand 250 states and 326 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 16 states have internal predecessors, (48), 12 states have call successors, (15), 9 states have call predecessors, (15), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-17 08:50:05,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:50:06,033 INFO L93 Difference]: Finished difference Result 323 states and 430 transitions. [2024-11-17 08:50:06,033 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 323 states and 430 transitions. [2024-11-17 08:50:06,037 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-17 08:50:06,037 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 323 states to 0 states and 0 transitions. [2024-11-17 08:50:06,037 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-17 08:50:06,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-17 08:50:06,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-17 08:50:06,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-17 08:50:06,038 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:50:06,038 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:50:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 08:50:06,039 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:50:06,039 INFO L332 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2024-11-17 08:50:06,039 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-17 08:50:06,040 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-17 08:50:06,040 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-17 08:50:06,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 17.11 08:50:06 BoogieIcfgContainer [2024-11-17 08:50:06,047 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-17 08:50:06,047 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-17 08:50:06,047 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-17 08:50:06,048 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-17 08:50:06,048 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:55" (3/4) ... [2024-11-17 08:50:06,050 INFO L146 WitnessPrinter]: No result that supports witness generation found [2024-11-17 08:50:06,050 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-17 08:50:06,051 INFO L158 Benchmark]: Toolchain (without parser) took 10756.87ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 131.0MB in the beginning and 181.1MB in the end (delta: -50.1MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,051 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 161.5MB. Free memory is still 128.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:50:06,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 161.5MB. Free memory was 131.0MB in the beginning and 119.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.15ms. Allocated memory is still 161.5MB. Free memory was 119.5MB in the beginning and 117.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,052 INFO L158 Benchmark]: Boogie Preprocessor took 27.74ms. Allocated memory is still 161.5MB. Free memory was 117.9MB in the beginning and 116.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,052 INFO L158 Benchmark]: IcfgBuilder took 278.42ms. Allocated memory is still 161.5MB. Free memory was 116.7MB in the beginning and 126.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,052 INFO L158 Benchmark]: BuchiAutomizer took 10171.12ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 126.8MB in the beginning and 181.1MB in the end (delta: -54.2MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2024-11-17 08:50:06,053 INFO L158 Benchmark]: Witness Printer took 3.05ms. Allocated memory is still 234.9MB. Free memory is still 181.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:50:06,054 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 161.5MB. Free memory is still 128.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 161.5MB. Free memory was 131.0MB in the beginning and 119.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.15ms. Allocated memory is still 161.5MB. Free memory was 119.5MB in the beginning and 117.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.74ms. Allocated memory is still 161.5MB. Free memory was 117.9MB in the beginning and 116.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 278.42ms. Allocated memory is still 161.5MB. Free memory was 116.7MB in the beginning and 126.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 10171.12ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 126.8MB in the beginning and 181.1MB in the end (delta: -54.2MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * Witness Printer took 3.05ms. Allocated memory is still 234.9MB. Free memory is still 181.1MB. 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 9 terminating modules (5 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 5 locations. One deterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function \old(n) and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.1s and 7 iterations. TraceHistogramMax:10. Analysis of lassos took 5.5s. Construction of modules took 0.7s. Büchi inclusion checks took 3.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 8. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 137 StatesRemovedByMinimization, 6 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, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 407 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 382 mSDsluCounter, 508 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 332 mSDsCounter, 291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1073 IncrementalHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 291 mSolverCounterUnsat, 176 mSDtfsCounter, 1073 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp86 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq178 hnf93 smp76 dnf100 smp100 tf112 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-11-17 08:50:06,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:06,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-17 08:50:06,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-17 08:50:06,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 08:50:07,077 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