./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/termination.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.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 a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 22:54:53,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 22:54:53,644 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-20 22:54:53,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 22:54:53,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 22:54:53,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 22:54:53,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 22:54:53,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 22:54:53,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 22:54:53,675 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 22:54:53,675 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 22:54:53,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 22:54:53,676 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 22:54:53,676 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-20 22:54:53,678 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-20 22:54:53,678 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-20 22:54:53,678 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-20 22:54:53,679 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-20 22:54:53,679 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-20 22:54:53,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 22:54:53,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-20 22:54:53,680 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 22:54:53,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 22:54:53,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 22:54:53,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 22:54:53,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-20 22:54:53,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-20 22:54:53,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-20 22:54:53,684 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 22:54:53,684 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 22:54:53,685 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 22:54:53,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 22:54:53,685 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-20 22:54:53,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 22:54:53,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 22:54:53,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 22:54:53,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 22:54:53,686 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 22:54:53,686 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-20 22:54:53,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a [2024-11-20 22:54:53,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 22:54:53,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 22:54:53,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 22:54:53,908 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 22:54:53,908 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 22:54:53,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2024-11-20 22:54:55,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 22:54:55,287 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 22:54:55,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2024-11-20 22:54:55,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/348ac39e2/ec9fe1e793b64ecd8add4891442ace09/FLAG109db8cc9 [2024-11-20 22:54:55,711 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/348ac39e2/ec9fe1e793b64ecd8add4891442ace09 [2024-11-20 22:54:55,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 22:54:55,714 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 22:54:55,715 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 22:54:55,715 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 22:54:55,721 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 22:54:55,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248426e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55, skipping insertion in model container [2024-11-20 22:54:55,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,736 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 22:54:55,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 22:54:55,871 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 22:54:55,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 22:54:55,894 INFO L204 MainTranslator]: Completed translation [2024-11-20 22:54:55,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55 WrapperNode [2024-11-20 22:54:55,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 22:54:55,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 22:54:55,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 22:54:55,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 22:54:55,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,916 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2024-11-20 22:54:55,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 22:54:55,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 22:54:55,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 22:54:55,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 22:54:55,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,932 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]. [2024-11-20 22:54:55,932 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,933 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 22:54:55,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 22:54:55,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 22:54:55,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 22:54:55,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (1/1) ... [2024-11-20 22:54:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,964 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) [2024-11-20 22:54:55,967 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 [2024-11-20 22:54:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 22:54:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 22:54:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 22:54:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 22:54:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-20 22:54:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-20 22:54:56,068 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 22:54:56,070 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 22:54:56,173 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-20 22:54:56,173 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 22:54:56,186 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 22:54:56,187 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-20 22:54:56,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:56 BoogieIcfgContainer [2024-11-20 22:54:56,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 22:54:56,188 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-20 22:54:56,189 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-20 22:54:56,192 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-20 22:54:56,193 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:56,193 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 10:54:55" (1/3) ... [2024-11-20 22:54:56,193 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4e8952f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 10:54:56, skipping insertion in model container [2024-11-20 22:54:56,194 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:56,194 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:55" (2/3) ... [2024-11-20 22:54:56,194 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4e8952f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 10:54:56, skipping insertion in model container [2024-11-20 22:54:56,194 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:56,195 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:56" (3/3) ... [2024-11-20 22:54:56,196 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2024-11-20 22:54:56,245 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-20 22:54:56,246 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-20 22:54:56,246 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-20 22:54:56,246 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-20 22:54:56,247 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-20 22:54:56,247 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-20 22:54:56,247 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-20 22:54:56,247 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-20 22:54:56,251 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) [2024-11-20 22:54:56,267 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,267 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:56,268 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:56,272 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-20 22:54:56,272 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:54:56,272 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-20 22:54:56,273 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) [2024-11-20 22:54:56,274 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,275 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:56,275 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:56,275 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-20 22:54:56,275 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:54:56,281 INFO L745 eck$LassoCheckResult]: Stem: 17#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 4#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 11#$Ultimate##0true [2024-11-20 22:54:56,281 INFO L747 eck$LassoCheckResult]: Loop: 11#$Ultimate##0true ~n := #in~n; 5#L8true assume !(~n < 1); 7#L10true assume !(1 == ~n); 13#L13true call #t~ret4 := fibo(~n - 1);< 11#$Ultimate##0true [2024-11-20 22:54:56,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2024-11-20 22:54:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151535401] [2024-11-20 22:54:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:56,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2024-11-20 22:54:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411092875] [2024-11-20 22:54:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:56,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2024-11-20 22:54:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501393360] [2024-11-20 22:54:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:56,505 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:56,505 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:56,505 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:56,505 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:56,505 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:54:56,506 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,506 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:56,506 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:56,506 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2024-11-20 22:54:56,506 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:56,506 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:56,518 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,526 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,528 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,531 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,538 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,593 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:56,594 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:54:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,604 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) [2024-11-20 22:54:56,609 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 [2024-11-20 22:54:56,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,610 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,629 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,630 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:56,640 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 [2024-11-20 22:54:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,644 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) [2024-11-20 22:54:56,649 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 [2024-11-20 22:54:56,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,664 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,664 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:56,672 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 [2024-11-20 22:54:56,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,674 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) [2024-11-20 22:54:56,676 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 [2024-11-20 22:54:56,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,676 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,693 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,693 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:56,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:56,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,721 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) [2024-11-20 22:54:56,722 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 [2024-11-20 22:54:56,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,724 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,741 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 [2024-11-20 22:54:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,743 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) [2024-11-20 22:54:56,744 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 [2024-11-20 22:54:56,748 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:54:56,748 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,796 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:54:56,802 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 [2024-11-20 22:54:56,802 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:56,802 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:56,802 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:56,803 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:56,803 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:54:56,803 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,803 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:56,803 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:56,803 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2024-11-20 22:54:56,803 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:56,803 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:56,804 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,809 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,812 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,816 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,824 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,869 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:56,872 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:54:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,875 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) [2024-11-20 22:54:56,876 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 [2024-11-20 22:54:56,877 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 [2024-11-20 22:54:56,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:56,887 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:56,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:56,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:56,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:56,889 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:56,889 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:56,891 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:56,899 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 [2024-11-20 22:54:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,902 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) [2024-11-20 22:54:56,907 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 [2024-11-20 22:54:56,908 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 [2024-11-20 22:54:56,918 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:56,919 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:56,919 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:56,919 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:56,919 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:56,920 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:56,920 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:56,921 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:56,926 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 [2024-11-20 22:54:56,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,928 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) [2024-11-20 22:54:56,929 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 [2024-11-20 22:54:56,930 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 [2024-11-20 22:54:56,940 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:56,940 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:56,940 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:56,940 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:56,940 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:56,941 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:56,941 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:56,942 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:56,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2024-11-20 22:54:56,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,949 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) [2024-11-20 22:54:56,950 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 [2024-11-20 22:54:56,951 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 [2024-11-20 22:54:56,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:56,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:56,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:56,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:56,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:56,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:56,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:56,964 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:54:56,966 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:54:56,966 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:54:56,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,980 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) [2024-11-20 22:54:56,981 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 [2024-11-20 22:54:56,982 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:54:56,982 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:54:56,982 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:54:56,982 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-20 22:54:56,988 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 [2024-11-20 22:54:56,991 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:54:57,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:54:57,116 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 [2024-11-20 22:54:57,118 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) [2024-11-20 22:54:57,202 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. [2024-11-20 22:54:57,205 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 [2024-11-20 22:54:57,210 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) [2024-11-20 22:54:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2024-11-20 22:54:57,212 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 4 letters. [2024-11-20 22:54:57,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 7 letters. Loop has 4 letters. [2024-11-20 22:54:57,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 8 letters. [2024-11-20 22:54:57,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,214 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 54 transitions. [2024-11-20 22:54:57,218 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:57,221 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 23 states and 31 transitions. [2024-11-20 22:54:57,223 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2024-11-20 22:54:57,223 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-11-20 22:54:57,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 31 transitions. [2024-11-20 22:54:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:57,225 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-20 22:54:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 31 transitions. [2024-11-20 22:54:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-20 22:54:57,245 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) [2024-11-20 22:54:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-20 22:54:57,249 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-20 22:54:57,249 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-20 22:54:57,249 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-20 22:54:57,249 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2024-11-20 22:54:57,250 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:57,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:57,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:57,252 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:57,252 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:57,252 INFO L745 eck$LassoCheckResult]: Stem: 135#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 136#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 121#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 120#$Ultimate##0 ~n := #in~n; 122#L8 assume !(~n < 1); 134#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := fibo(~n - 1);< 123#$Ultimate##0 ~n := #in~n; 125#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 132#fiboEXIT >#35#return; 127#L13-1 [2024-11-20 22:54:57,252 INFO L747 eck$LassoCheckResult]: Loop: 127#L13-1 call #t~ret5 := fibo(~n - 2);< 128#$Ultimate##0 ~n := #in~n; 138#L8 assume !(~n < 1); 139#L10 assume !(1 == ~n); 126#L13 call #t~ret4 := fibo(~n - 1);< 128#$Ultimate##0 ~n := #in~n; 138#L8 assume ~n < 1;#res := 0; 130#fiboFINAL assume true; 137#fiboEXIT >#35#return; 127#L13-1 [2024-11-20 22:54:57,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2024-11-20 22:54:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:57,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505374394] [2024-11-20 22:54:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-20 22:54:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 22:54:57,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505374394] [2024-11-20 22:54:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505374394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:54:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:54:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:54:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213122236] [2024-11-20 22:54:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:54:57,378 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:57,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2024-11-20 22:54:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:57,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914280539] [2024-11-20 22:54:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:54:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 22:54:57,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:57,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914280539] [2024-11-20 22:54:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914280539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:54:57,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:54:57,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:54:57,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454494973] [2024-11-20 22:54:57,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:54:57,470 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:54:57,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 22:54:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 22:54:57,473 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) [2024-11-20 22:54:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:57,536 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-20 22:54:57,536 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2024-11-20 22:54:57,538 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:57,538 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2024-11-20 22:54:57,539 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-11-20 22:54:57,539 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-11-20 22:54:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2024-11-20 22:54:57,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:57,539 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2024-11-20 22:54:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-20 22:54:57,541 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) [2024-11-20 22:54:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-20 22:54:57,542 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:54:57,543 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:57,543 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-20 22:54:57,543 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2024-11-20 22:54:57,544 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:57,544 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:57,544 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:57,544 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:57,544 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:57,544 INFO L745 eck$LassoCheckResult]: Stem: 205#$Ultimate##0 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(12, 2);call #Ultimate.allocInit(12, 3); 206#L-1 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 := 10; 199#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 202#$Ultimate##0 ~n := #in~n; 197#L8 assume !(~n < 1); 208#L10 assume !(1 == ~n); 196#L13 call #t~ret4 := fibo(~n - 1);< 195#$Ultimate##0 ~n := #in~n; 198#L8 assume !(~n < 1); 214#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 211#fiboEXIT >#35#return; 192#L13-1 [2024-11-20 22:54:57,545 INFO L747 eck$LassoCheckResult]: Loop: 192#L13-1 call #t~ret5 := fibo(~n - 2);< 191#$Ultimate##0 ~n := #in~n; 194#L8 assume !(~n < 1); 207#L10 assume !(1 == ~n); 193#L13 call #t~ret4 := fibo(~n - 1);< 191#$Ultimate##0 ~n := #in~n; 194#L8 assume !(~n < 1); 207#L10 assume 1 == ~n;#res := 1; 209#fiboFINAL assume true; 210#fiboEXIT >#35#return; 192#L13-1 [2024-11-20 22:54:57,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,545 INFO L85 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2024-11-20 22:54:57,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:57,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527338025] [2024-11-20 22:54:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-20 22:54:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:54:57,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527338025] [2024-11-20 22:54:57,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527338025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:57,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015810417] [2024-11-20 22:54:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:54:57,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 22:54:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:54:57,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:54:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015810417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:57,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:57,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-20 22:54:57,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58019064] [2024-11-20 22:54:57,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:57,747 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:57,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2024-11-20 22:54:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:57,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222255231] [2024-11-20 22:54:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:57,751 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:57,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:57,874 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:57,875 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:57,875 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:57,875 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:57,875 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:54:57,875 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,875 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:57,875 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:57,875 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2024-11-20 22:54:57,875 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:57,875 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:57,876 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,878 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,880 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,882 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,886 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,911 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:57,912 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:54:57,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,913 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) [2024-11-20 22:54:57,921 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 [2024-11-20 22:54:57,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:57,930 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:57,930 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:57,942 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:57,942 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#in~n=2} Honda state: {fibo_#in~n=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:57,948 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 [2024-11-20 22:54:57,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-20 22:54:57,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2024-11-20 22:54:57,953 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:57,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:57,975 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:57,975 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:57,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2024-11-20 22:54:57,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,990 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) [2024-11-20 22:54:57,992 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 [2024-11-20 22:54:57,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:57,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:58,003 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:58,003 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:54:58,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,010 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) [2024-11-20 22:54:58,011 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 [2024-11-20 22:54:58,013 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:58,013 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:58,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2024-11-20 22:54:58,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,032 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) [2024-11-20 22:54:58,033 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 [2024-11-20 22:54:58,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:54:58,034 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:58,048 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:54:58,054 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 [2024-11-20 22:54:58,054 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:58,054 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:58,054 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:58,054 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:58,054 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:54:58,054 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,054 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:58,054 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:58,054 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2024-11-20 22:54:58,054 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:58,055 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:58,056 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:58,063 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:58,065 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:58,067 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:58,073 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:58,116 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:58,116 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:54:58,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,119 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) [2024-11-20 22:54:58,120 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 [2024-11-20 22:54:58,122 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 [2024-11-20 22:54:58,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:58,132 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:58,132 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:58,132 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:58,132 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:58,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:58,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:58,135 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:58,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:58,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,145 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) [2024-11-20 22:54:58,146 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 [2024-11-20 22:54:58,147 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 [2024-11-20 22:54:58,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:58,157 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:58,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:58,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:58,157 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:58,158 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:58,158 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:58,159 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:58,165 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 [2024-11-20 22:54:58,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,166 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) [2024-11-20 22:54:58,167 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 [2024-11-20 22:54:58,167 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 [2024-11-20 22:54:58,178 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:58,179 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:58,179 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:58,179 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:58,179 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:58,179 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:58,179 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:58,181 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:58,186 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 [2024-11-20 22:54:58,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,189 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-20 22:54:58,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2024-11-20 22:54:58,191 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 [2024-11-20 22:54:58,201 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:58,202 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:58,202 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:58,202 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:58,202 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:58,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:58,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:58,203 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:58,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2024-11-20 22:54:58,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-20 22:54:58,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2024-11-20 22:54:58,220 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 [2024-11-20 22:54:58,230 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:58,231 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:58,231 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:58,231 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:58,231 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:58,232 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:58,232 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:58,233 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:54:58,236 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:54:58,236 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:54:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,238 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-20 22:54:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2024-11-20 22:54:58,240 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:54:58,240 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:54:58,240 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:54:58,240 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-20 22:54:58,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:58,247 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:54:58,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:58,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 22:54:58,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:54:58,419 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2024-11-20 22:54:58,419 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 22:54:58,612 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 128 states and 178 transitions. Complement of second has 40 states. [2024-11-20 22:54:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2024-11-20 22:54:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 22:54:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 40 transitions. [2024-11-20 22:54:58,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 12 letters. Loop has 10 letters. [2024-11-20 22:54:58,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:58,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 22 letters. Loop has 10 letters. [2024-11-20 22:54:58,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:58,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 12 letters. Loop has 20 letters. [2024-11-20 22:54:58,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:58,615 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 178 transitions. [2024-11-20 22:54:58,620 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:58,623 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 105 states and 151 transitions. [2024-11-20 22:54:58,624 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 62 [2024-11-20 22:54:58,624 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2024-11-20 22:54:58,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 151 transitions. [2024-11-20 22:54:58,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:58,624 INFO L218 hiAutomatonCegarLoop]: Abstraction has 105 states and 151 transitions. [2024-11-20 22:54:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 151 transitions. [2024-11-20 22:54:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2024-11-20 22:54:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (35), 18 states have call predecessors, (35), 19 states have call successors, (35) [2024-11-20 22:54:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2024-11-20 22:54:58,633 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94 states and 128 transitions. [2024-11-20 22:54:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 22:54:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-20 22:54:58,634 INFO L87 Difference]: Start difference. First operand 94 states and 128 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) [2024-11-20 22:54:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:58,744 INFO L93 Difference]: Finished difference Result 119 states and 163 transitions. [2024-11-20 22:54:58,744 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 163 transitions. [2024-11-20 22:54:58,747 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:58,751 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 158 transitions. [2024-11-20 22:54:58,751 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2024-11-20 22:54:58,751 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2024-11-20 22:54:58,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 158 transitions. [2024-11-20 22:54:58,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:58,752 INFO L218 hiAutomatonCegarLoop]: Abstraction has 114 states and 158 transitions. [2024-11-20 22:54:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 158 transitions. [2024-11-20 22:54:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2024-11-20 22:54:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (39), 20 states have call predecessors, (39), 22 states have call successors, (39) [2024-11-20 22:54:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 143 transitions. [2024-11-20 22:54:58,759 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 143 transitions. [2024-11-20 22:54:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 22:54:58,760 INFO L425 stractBuchiCegarLoop]: Abstraction has 106 states and 143 transitions. [2024-11-20 22:54:58,760 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-20 22:54:58,760 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 143 transitions. [2024-11-20 22:54:58,762 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:58,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:58,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:58,763 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:58,763 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1] [2024-11-20 22:54:58,763 INFO L745 eck$LassoCheckResult]: Stem: 806#$Ultimate##0 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(12, 2);call #Ultimate.allocInit(12, 3); 807#L-1 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 := 10; 792#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 793#$Ultimate##0 ~n := #in~n; 809#L8 assume !(~n < 1); 810#L10 assume !(1 == ~n); 780#L13 call #t~ret4 := fibo(~n - 1);< 779#$Ultimate##0 ~n := #in~n; 781#L8 assume !(~n < 1); 816#L10 assume !(1 == ~n); 790#L13 call #t~ret4 := fibo(~n - 1);< 791#$Ultimate##0 ~n := #in~n; 838#L8 assume !(~n < 1); 836#L10 assume !(1 == ~n); 832#L13 call #t~ret4 := fibo(~n - 1);< 791#$Ultimate##0 ~n := #in~n; 838#L8 assume !(~n < 1); 836#L10 assume !(1 == ~n); 832#L13 call #t~ret4 := fibo(~n - 1);< 791#$Ultimate##0 ~n := #in~n; 839#L8 assume !(~n < 1); 837#L10 assume 1 == ~n;#res := 1; 835#fiboFINAL assume true; 834#fiboEXIT >#35#return; 817#L13-1 call #t~ret5 := fibo(~n - 2);< 833#$Ultimate##0 ~n := #in~n; 879#L8 assume ~n < 1;#res := 0; 878#fiboFINAL assume true; 877#fiboEXIT >#37#return; 875#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 872#fiboFINAL assume true; 864#fiboEXIT >#35#return; 813#L13-1 [2024-11-20 22:54:58,763 INFO L747 eck$LassoCheckResult]: Loop: 813#L13-1 call #t~ret5 := fibo(~n - 2);< 789#$Ultimate##0 ~n := #in~n; 869#L8 assume !(~n < 1); 811#L10 assume !(1 == ~n); 814#L13 call #t~ret4 := fibo(~n - 1);< 789#$Ultimate##0 ~n := #in~n; 869#L8 assume !(~n < 1); 811#L10 assume !(1 == ~n); 814#L13 call #t~ret4 := fibo(~n - 1);< 789#$Ultimate##0 ~n := #in~n; 869#L8 assume !(~n < 1); 811#L10 assume 1 == ~n;#res := 1; 815#fiboFINAL assume true; 861#fiboEXIT >#35#return; 813#L13-1 call #t~ret5 := fibo(~n - 2);< 789#$Ultimate##0 ~n := #in~n; 869#L8 assume !(~n < 1); 811#L10 assume 1 == ~n;#res := 1; 815#fiboFINAL assume true; 861#fiboEXIT >#37#return; 862#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 871#fiboFINAL assume true; 865#fiboEXIT >#35#return; 813#L13-1 [2024-11-20 22:54:58,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash 870102534, now seen corresponding path program 1 times [2024-11-20 22:54:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649389819] [2024-11-20 22:54:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-20 22:54:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:54:58,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:58,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649389819] [2024-11-20 22:54:58,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649389819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:58,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558062561] [2024-11-20 22:54:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,958 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:54:58,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 22:54:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 22:54:58,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:54:59,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 22:54:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558062561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:59,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2024-11-20 22:54:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619399423] [2024-11-20 22:54:59,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:59,252 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:59,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1138642743, now seen corresponding path program 1 times [2024-11-20 22:54:59,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:59,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836499686] [2024-11-20 22:54:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2024-11-20 22:54:59,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:54:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 22:54:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836499686] [2024-11-20 22:54:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836499686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470949689] [2024-11-20 22:54:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:59,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:59,351 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:54:59,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 22:54:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:59,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 22:54:59,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 22:54:59,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470949689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:59,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:59,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 22:54:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152288030] [2024-11-20 22:54:59,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:59,508 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:54:59,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 22:54:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 22:54:59,509 INFO L87 Difference]: Start difference. First operand 106 states and 143 transitions. cyclomatic complexity: 42 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) [2024-11-20 22:54:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:59,584 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-20 22:54:59,584 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 76 transitions. [2024-11-20 22:54:59,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:59,587 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 54 states and 70 transitions. [2024-11-20 22:54:59,587 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2024-11-20 22:54:59,587 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-20 22:54:59,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2024-11-20 22:54:59,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:59,587 INFO L218 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2024-11-20 22:54:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-20 22:54:59,593 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) [2024-11-20 22:54:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-20 22:54:59,594 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 22:54:59,600 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:59,601 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-20 22:54:59,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2024-11-20 22:54:59,602 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:59,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:59,603 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:59,604 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:59,605 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2024-11-20 22:54:59,605 INFO L745 eck$LassoCheckResult]: Stem: 1377#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 1378#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 1371#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1372#$Ultimate##0 ~n := #in~n; 1387#L8 assume !(~n < 1); 1386#L10 assume !(1 == ~n); 1359#L13 call #t~ret4 := fibo(~n - 1);< 1358#$Ultimate##0 ~n := #in~n; 1360#L8 assume !(~n < 1); 1380#L10 assume !(1 == ~n); 1364#L13 call #t~ret4 := fibo(~n - 1);< 1365#$Ultimate##0 ~n := #in~n; 1385#L8 assume !(~n < 1); 1403#L10 assume !(1 == ~n); 1375#L13 call #t~ret4 := fibo(~n - 1);< 1365#$Ultimate##0 ~n := #in~n; 1385#L8 assume !(~n < 1); 1403#L10 assume !(1 == ~n); 1375#L13 call #t~ret4 := fibo(~n - 1);< 1365#$Ultimate##0 ~n := #in~n; 1384#L8 assume !(~n < 1); 1381#L10 assume 1 == ~n;#res := 1; 1382#fiboFINAL assume true; 1374#fiboEXIT >#35#return; 1376#L13-1 call #t~ret5 := fibo(~n - 2);< 1402#$Ultimate##0 ~n := #in~n; 1408#L8 assume ~n < 1;#res := 0; 1407#fiboFINAL assume true; 1401#fiboEXIT >#37#return; 1399#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1397#fiboFINAL assume true; 1394#fiboEXIT >#35#return; 1368#L13-1 [2024-11-20 22:54:59,606 INFO L747 eck$LassoCheckResult]: Loop: 1368#L13-1 call #t~ret5 := fibo(~n - 2);< 1363#$Ultimate##0 ~n := #in~n; 1388#L8 assume !(~n < 1); 1389#L10 assume !(1 == ~n); 1367#L13 call #t~ret4 := fibo(~n - 1);< 1363#$Ultimate##0 ~n := #in~n; 1388#L8 assume !(~n < 1); 1389#L10 assume !(1 == ~n); 1367#L13 call #t~ret4 := fibo(~n - 1);< 1363#$Ultimate##0 ~n := #in~n; 1388#L8 assume !(~n < 1); 1389#L10 assume !(1 == ~n); 1367#L13 call #t~ret4 := fibo(~n - 1);< 1363#$Ultimate##0 ~n := #in~n; 1388#L8 assume !(~n < 1); 1389#L10 assume 1 == ~n;#res := 1; 1404#fiboFINAL assume true; 1405#fiboEXIT >#35#return; 1356#L13-1 call #t~ret5 := fibo(~n - 2);< 1355#$Ultimate##0 ~n := #in~n; 1357#L8 assume ~n < 1;#res := 0; 1379#fiboFINAL assume true; 1400#fiboEXIT >#37#return; 1366#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1370#fiboFINAL assume true; 1373#fiboEXIT >#35#return; 1368#L13-1 call #t~ret5 := fibo(~n - 2);< 1363#$Ultimate##0 ~n := #in~n; 1388#L8 assume ~n < 1;#res := 0; 1379#fiboFINAL assume true; 1400#fiboEXIT >#37#return; 1391#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1398#fiboFINAL assume true; 1395#fiboEXIT >#35#return; 1368#L13-1 [2024-11-20 22:54:59,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 870102534, now seen corresponding path program 2 times [2024-11-20 22:54:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:59,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661563333] [2024-11-20 22:54:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-20 22:54:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:54:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661563333] [2024-11-20 22:54:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661563333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324657213] [2024-11-20 22:54:59,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 22:54:59,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:59,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:54:59,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 22:54:59,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 22:54:59,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:54:59,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 22:54:59,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:54:59,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 22:55:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324657213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:00,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:00,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2024-11-20 22:55:00,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214291787] [2024-11-20 22:55:00,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:00,007 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:55:00,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1083596768, now seen corresponding path program 1 times [2024-11-20 22:55:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:00,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722413466] [2024-11-20 22:55:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:55:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:55:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:55:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:55:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-20 22:55:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 22:55:00,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:55:00,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722413466] [2024-11-20 22:55:00,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722413466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:55:00,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046707499] [2024-11-20 22:55:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:00,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:55:00,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,115 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:55:00,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 22:55:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 22:55:00,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 22:55:00,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 22:55:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046707499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:00,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:00,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 14 [2024-11-20 22:55:00,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336156461] [2024-11-20 22:55:00,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:00,394 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:55:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:55:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 22:55:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-20 22:55:00,395 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-20 22:55:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:55:00,671 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-11-20 22:55:00,672 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 110 states and 129 transitions. [2024-11-20 22:55:00,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:55:00,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 110 states to 99 states and 118 transitions. [2024-11-20 22:55:00,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 72 [2024-11-20 22:55:00,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 72 [2024-11-20 22:55:00,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 118 transitions. [2024-11-20 22:55:00,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:00,674 INFO L218 hiAutomatonCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:55:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states and 118 transitions. [2024-11-20 22:55:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-20 22:55:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 23 states have call successors, (23), 14 states have call predecessors, (23), 12 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2024-11-20 22:55:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2024-11-20 22:55:00,685 INFO L240 hiAutomatonCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:55:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 22:55:00,685 INFO L425 stractBuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:55:00,685 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-20 22:55:00,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2024-11-20 22:55:00,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:55:00,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:55:00,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:55:00,687 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:55:00,687 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-20 22:55:00,688 INFO L745 eck$LassoCheckResult]: Stem: 2063#$Ultimate##0 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(12, 2);call #Ultimate.allocInit(12, 3); 2064#L-1 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 := 10; 2059#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 2060#$Ultimate##0 ~n := #in~n; 2066#L8 assume !(~n < 1); 2067#L10 assume !(1 == ~n); 2050#L13 call #t~ret4 := fibo(~n - 1);< 2049#$Ultimate##0 ~n := #in~n; 2051#L8 assume !(~n < 1); 2091#L10 assume !(1 == ~n); 2055#L13 call #t~ret4 := fibo(~n - 1);< 2056#$Ultimate##0 ~n := #in~n; 2090#L8 assume !(~n < 1); 2089#L10 assume !(1 == ~n); 2085#L13 call #t~ret4 := fibo(~n - 1);< 2088#$Ultimate##0 ~n := #in~n; 2087#L8 assume !(~n < 1); 2086#L10 assume !(1 == ~n); 2081#L13 call #t~ret4 := fibo(~n - 1);< 2084#$Ultimate##0 ~n := #in~n; 2083#L8 assume !(~n < 1); 2082#L10 assume !(1 == ~n); 2077#L13 call #t~ret4 := fibo(~n - 1);< 2080#$Ultimate##0 ~n := #in~n; 2079#L8 assume !(~n < 1); 2078#L10 assume !(1 == ~n); 2069#L13 call #t~ret4 := fibo(~n - 1);< 2075#$Ultimate##0 ~n := #in~n; 2076#L8 assume !(~n < 1); 2144#L10 assume !(1 == ~n); 2070#L13 call #t~ret4 := fibo(~n - 1);< 2075#$Ultimate##0 ~n := #in~n; 2076#L8 assume !(~n < 1); 2144#L10 assume !(1 == ~n); 2070#L13 call #t~ret4 := fibo(~n - 1);< 2075#$Ultimate##0 ~n := #in~n; 2074#L8 assume !(~n < 1); 2068#L10 assume 1 == ~n;#res := 1; 2071#fiboFINAL assume true; 2102#fiboEXIT >#35#return; 2047#L13-1 call #t~ret5 := fibo(~n - 2);< 2046#$Ultimate##0 ~n := #in~n; 2048#L8 assume ~n < 1;#res := 0; 2065#fiboFINAL assume true; 2119#fiboEXIT >#37#return; 2117#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2111#fiboFINAL assume true; 2107#fiboEXIT >#35#return; 2097#L13-1 [2024-11-20 22:55:00,688 INFO L747 eck$LassoCheckResult]: Loop: 2097#L13-1 call #t~ret5 := fibo(~n - 2);< 2103#$Ultimate##0 ~n := #in~n; 2115#L8 assume !(~n < 1); 2110#L10 assume !(1 == ~n); 2096#L13 call #t~ret4 := fibo(~n - 1);< 2103#$Ultimate##0 ~n := #in~n; 2115#L8 assume !(~n < 1); 2110#L10 assume !(1 == ~n); 2096#L13 call #t~ret4 := fibo(~n - 1);< 2103#$Ultimate##0 ~n := #in~n; 2115#L8 assume !(~n < 1); 2110#L10 assume 1 == ~n;#res := 1; 2104#fiboFINAL assume true; 2100#fiboEXIT >#35#return; 2093#L13-1 call #t~ret5 := fibo(~n - 2);< 2099#$Ultimate##0 ~n := #in~n; 2124#L8 assume ~n < 1;#res := 0; 2116#fiboFINAL assume true; 2120#fiboEXIT >#37#return; 2121#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2143#fiboFINAL assume true; 2105#fiboEXIT >#35#return; 2097#L13-1 [2024-11-20 22:55:00,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -683438758, now seen corresponding path program 3 times [2024-11-20 22:55:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:00,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996883250] [2024-11-20 22:55:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-20 22:55:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:55:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:55:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:55:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:55:00,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996883250] [2024-11-20 22:55:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996883250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:55:00,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802563040] [2024-11-20 22:55:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 22:55:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:55:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,943 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:55:00,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 22:55:00,976 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-20 22:55:00,976 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:55:00,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 22:55:00,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 22:55:01,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 22:55:01,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802563040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:01,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:01,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2024-11-20 22:55:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681686808] [2024-11-20 22:55:01,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:01,286 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:55:01,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 2 times [2024-11-20 22:55:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121798629] [2024-11-20 22:55:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:01,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:55:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:01,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:55:01,484 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:01,484 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:01,484 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:01,484 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:01,484 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:55:01,484 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,485 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:01,485 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:01,485 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2024-11-20 22:55:01,485 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:01,485 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:01,486 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,495 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,498 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,500 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,540 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:01,540 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:55:01,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:01,543 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2024-11-20 22:55:01,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2024-11-20 22:55:01,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:01,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:01,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:01,571 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) [2024-11-20 22:55:01,573 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 [2024-11-20 22:55:01,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:55:01,574 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:01,705 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:55:01,711 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 [2024-11-20 22:55:01,712 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:01,712 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:01,712 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:01,712 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:01,712 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:55:01,712 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,712 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:01,712 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:01,712 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2024-11-20 22:55:01,712 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:01,712 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:01,713 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,720 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,722 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,724 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:01,753 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:01,753 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:55:01,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:01,754 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) [2024-11-20 22:55:01,755 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 [2024-11-20 22:55:01,756 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 [2024-11-20 22:55:01,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:01,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:01,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:01,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:01,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:01,767 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:01,767 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:01,769 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:55:01,771 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-20 22:55:01,771 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-20 22:55:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:01,772 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) [2024-11-20 22:55:01,773 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 [2024-11-20 22:55:01,774 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:55:01,774 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:55:01,774 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:55:01,774 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-20 22:55:01,780 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 [2024-11-20 22:55:01,780 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:55:01,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:01,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:01,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 22:55:02,104 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 [2024-11-20 22:55:02,104 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21 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) [2024-11-20 22:55:02,171 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21. 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 106 states and 125 transitions. Complement of second has 11 states. [2024-11-20 22:55:02,173 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 [2024-11-20 22:55:02,173 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) [2024-11-20 22:55:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-20 22:55:02,174 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:02,174 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:02,174 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:02,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 22:55:02,479 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 [2024-11-20 22:55:02,480 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21 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) [2024-11-20 22:55:02,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:02,558 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21. 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 106 states and 125 transitions. Complement of second has 11 states. [2024-11-20 22:55:02,559 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 [2024-11-20 22:55:02,560 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) [2024-11-20 22:55:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-20 22:55:02,560 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:02,560 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:02,560 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:02,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 22:55:02,857 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 [2024-11-20 22:55:02,857 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21 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) [2024-11-20 22:55:03,026 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 21. 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 537 states and 697 transitions. Complement of second has 132 states. [2024-11-20 22:55:03,027 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 [2024-11-20 22:55:03,027 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) [2024-11-20 22:55:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 45 transitions. [2024-11-20 22:55:03,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:03,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:03,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 70 letters. Loop has 22 letters. [2024-11-20 22:55:03,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:03,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 48 letters. Loop has 44 letters. [2024-11-20 22:55:03,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:03,030 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 697 transitions. [2024-11-20 22:55:03,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:03,041 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 382 states and 513 transitions. [2024-11-20 22:55:03,041 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 161 [2024-11-20 22:55:03,042 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 186 [2024-11-20 22:55:03,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 382 states and 513 transitions. [2024-11-20 22:55:03,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:03,042 INFO L218 hiAutomatonCegarLoop]: Abstraction has 382 states and 513 transitions. [2024-11-20 22:55:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states and 513 transitions. [2024-11-20 22:55:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 337. [2024-11-20 22:55:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 206 states have (on average 1.0922330097087378) internal successors, (225), 219 states have internal predecessors, (225), 80 states have call successors, (84), 42 states have call predecessors, (84), 51 states have return successors, (126), 75 states have call predecessors, (126), 70 states have call successors, (126) [2024-11-20 22:55:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 435 transitions. [2024-11-20 22:55:03,073 INFO L240 hiAutomatonCegarLoop]: Abstraction has 337 states and 435 transitions. [2024-11-20 22:55:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:55:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 22:55:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-20 22:55:03,074 INFO L87 Difference]: Start difference. First operand 337 states and 435 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 15 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-20 22:55:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:55:03,338 INFO L93 Difference]: Finished difference Result 462 states and 593 transitions. [2024-11-20 22:55:03,338 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 593 transitions. [2024-11-20 22:55:03,342 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:03,346 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 455 states and 580 transitions. [2024-11-20 22:55:03,346 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 210 [2024-11-20 22:55:03,346 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 210 [2024-11-20 22:55:03,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 455 states and 580 transitions. [2024-11-20 22:55:03,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:03,346 INFO L218 hiAutomatonCegarLoop]: Abstraction has 455 states and 580 transitions. [2024-11-20 22:55:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states and 580 transitions. [2024-11-20 22:55:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 435. [2024-11-20 22:55:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 267 states have (on average 1.0823970037453183) internal successors, (289), 281 states have internal predecessors, (289), 106 states have call successors, (110), 55 states have call predecessors, (110), 62 states have return successors, (159), 98 states have call predecessors, (159), 94 states have call successors, (159) [2024-11-20 22:55:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 558 transitions. [2024-11-20 22:55:03,362 INFO L240 hiAutomatonCegarLoop]: Abstraction has 435 states and 558 transitions. [2024-11-20 22:55:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 22:55:03,363 INFO L425 stractBuchiCegarLoop]: Abstraction has 435 states and 558 transitions. [2024-11-20 22:55:03,363 INFO L332 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2024-11-20 22:55:03,363 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 435 states and 558 transitions. [2024-11-20 22:55:03,365 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:03,365 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:55:03,365 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:55:03,367 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 12, 11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:55:03,367 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:55:03,368 INFO L745 eck$LassoCheckResult]: Stem: 4917#$Ultimate##0 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(12, 2);call #Ultimate.allocInit(12, 3); 4918#L-1 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 := 10; 4908#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 4909#$Ultimate##0 ~n := #in~n; 4958#L8 assume !(~n < 1); 4957#L10 assume !(1 == ~n); 4953#L13 call #t~ret4 := fibo(~n - 1);< 4956#$Ultimate##0 ~n := #in~n; 4955#L8 assume !(~n < 1); 4954#L10 assume !(1 == ~n); 4949#L13 call #t~ret4 := fibo(~n - 1);< 4952#$Ultimate##0 ~n := #in~n; 4951#L8 assume !(~n < 1); 4950#L10 assume !(1 == ~n); 4945#L13 call #t~ret4 := fibo(~n - 1);< 4948#$Ultimate##0 ~n := #in~n; 4947#L8 assume !(~n < 1); 4946#L10 assume !(1 == ~n); 4941#L13 call #t~ret4 := fibo(~n - 1);< 4944#$Ultimate##0 ~n := #in~n; 4943#L8 assume !(~n < 1); 4942#L10 assume !(1 == ~n); 4937#L13 call #t~ret4 := fibo(~n - 1);< 4940#$Ultimate##0 ~n := #in~n; 4939#L8 assume !(~n < 1); 4938#L10 assume !(1 == ~n); 4933#L13 call #t~ret4 := fibo(~n - 1);< 4936#$Ultimate##0 ~n := #in~n; 4935#L8 assume !(~n < 1); 4934#L10 assume !(1 == ~n); 4914#L13 call #t~ret4 := fibo(~n - 1);< 4930#$Ultimate##0 ~n := #in~n; 4932#L8 assume !(~n < 1); 5268#L10 assume !(1 == ~n); 4913#L13 call #t~ret4 := fibo(~n - 1);< 4930#$Ultimate##0 ~n := #in~n; 4932#L8 assume !(~n < 1); 5268#L10 assume !(1 == ~n); 4913#L13 call #t~ret4 := fibo(~n - 1);< 4930#$Ultimate##0 ~n := #in~n; 4931#L8 assume !(~n < 1); 5315#L10 assume 1 == ~n;#res := 1; 5313#fiboFINAL assume true; 4912#fiboEXIT >#35#return; 4915#L13-1 call #t~ret5 := fibo(~n - 2);< 5284#$Ultimate##0 ~n := #in~n; 5288#L8 assume ~n < 1;#res := 0; 5287#fiboFINAL assume true; 5283#fiboEXIT >#37#return; 5282#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5281#fiboFINAL assume true; 5267#fiboEXIT >#35#return; 4923#L13-1 call #t~ret5 := fibo(~n - 2);< 5244#$Ultimate##0 ~n := #in~n; 5273#L8 assume !(~n < 1); 5272#L10 assume !(1 == ~n); 4903#L13 call #t~ret4 := fibo(~n - 1);< 5046#$Ultimate##0 ~n := #in~n; 5045#L8 assume !(~n < 1); 5003#L10 assume !(1 == ~n); 4984#L13 call #t~ret4 := fibo(~n - 1);< 4992#$Ultimate##0 [2024-11-20 22:55:03,368 INFO L747 eck$LassoCheckResult]: Loop: 4992#$Ultimate##0 ~n := #in~n; 4999#L8 assume !(~n < 1); 4998#L10 assume !(1 == ~n); 4983#L13 call #t~ret4 := fibo(~n - 1);< 4992#$Ultimate##0 [2024-11-20 22:55:03,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash -366223317, now seen corresponding path program 4 times [2024-11-20 22:55:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:03,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936288307] [2024-11-20 22:55:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:03,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-20 22:55:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:55:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:55:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 198 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 22:55:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:55:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936288307] [2024-11-20 22:55:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936288307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:55:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523044527] [2024-11-20 22:55:03,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 22:55:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:55:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,631 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 22:55:03,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-20 22:55:03,670 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 22:55:03,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:55:03,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 199 proven. 72 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-20 22:55:03,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 199 proven. 72 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-20 22:55:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523044527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:03,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 24 [2024-11-20 22:55:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531333101] [2024-11-20 22:55:03,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:03,929 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:55:03,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2024-11-20 22:55:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:03,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956967815] [2024-11-20 22:55:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:03,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:55:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:03,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:55:03,960 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:03,960 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:03,960 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:03,960 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:03,960 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:55:03,961 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,961 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:03,961 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:03,961 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2024-11-20 22:55:03,961 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:03,961 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:03,961 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,963 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,964 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,965 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,967 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,989 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:03,989 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:55:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,992 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) [2024-11-20 22:55:03,992 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 [2024-11-20 22:55:03,993 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:03,993 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,004 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:04,004 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:55:04,009 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 [2024-11-20 22:55:04,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,011 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) [2024-11-20 22:55:04,011 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 [2024-11-20 22:55:04,013 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:04,013 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,024 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:04,024 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:55:04,029 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 [2024-11-20 22:55:04,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,031 INFO L229 MonitoredProcess]: Starting monitored process 36 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) [2024-11-20 22:55:04,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2024-11-20 22:55:04,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:04,034 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,046 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:04,046 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:55:04,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,052 INFO L229 MonitoredProcess]: Starting monitored process 37 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) [2024-11-20 22:55:04,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2024-11-20 22:55:04,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:04,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,064 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:04,064 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-20 22:55:04,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,071 INFO L229 MonitoredProcess]: Starting monitored process 38 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) [2024-11-20 22:55:04,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2024-11-20 22:55:04,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:04,072 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,089 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2024-11-20 22:55:04,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2024-11-20 22:55:04,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:55:04,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:04,133 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:55:04,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,137 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:04,137 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:04,137 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:04,137 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:04,137 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:55:04,137 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,137 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:04,137 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:04,137 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2024-11-20 22:55:04,137 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:04,137 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:04,138 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:04,140 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:04,141 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:04,145 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:04,147 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:04,168 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:04,168 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:55:04,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,170 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2024-11-20 22:55:04,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2024-11-20 22:55:04,173 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 [2024-11-20 22:55:04,183 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:04,183 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:04,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:04,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:04,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:04,184 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:04,184 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:04,185 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:55:04,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,192 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2024-11-20 22:55:04,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2024-11-20 22:55:04,194 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 [2024-11-20 22:55:04,204 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:04,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:04,205 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:04,205 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:04,205 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:04,205 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:04,205 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:04,207 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:55:04,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,214 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2024-11-20 22:55:04,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2024-11-20 22:55:04,217 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 [2024-11-20 22:55:04,227 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:04,228 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:04,228 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:04,228 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:04,228 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:04,229 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:04,229 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:04,231 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:55:04,233 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:55:04,233 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:55:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:04,235 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2024-11-20 22:55:04,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2024-11-20 22:55:04,237 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:55:04,237 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:55:04,237 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:55:04,237 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-20 22:55:04,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,243 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:55:04,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:04,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:04,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:04,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:04,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:55:04,464 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 [2024-11-20 22:55:04,464 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127 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) [2024-11-20 22:55:04,515 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127. 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 460 states and 583 transitions. Complement of second has 15 states. [2024-11-20 22:55:04,516 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 [2024-11-20 22:55:04,516 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) [2024-11-20 22:55:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-20 22:55:04,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:04,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:04,516 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:04,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:04,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:04,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:04,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2024-11-20 22:55:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:04,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:04,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:55:04,755 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 [2024-11-20 22:55:04,755 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127 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) [2024-11-20 22:55:04,797 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127. 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 460 states and 583 transitions. Complement of second has 15 states. [2024-11-20 22:55:04,797 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 [2024-11-20 22:55:04,797 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) [2024-11-20 22:55:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-20 22:55:04,798 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:04,798 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:04,798 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:04,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:04,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:04,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:05,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:05,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:55:05,023 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 [2024-11-20 22:55:05,023 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127 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) [2024-11-20 22:55:05,078 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 435 states and 558 transitions. cyclomatic complexity: 127. 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 589 states and 714 transitions. Complement of second has 19 states. [2024-11-20 22:55:05,078 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 [2024-11-20 22:55:05,079 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) [2024-11-20 22:55:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2024-11-20 22:55:05,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:05,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:05,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 65 letters. Loop has 4 letters. [2024-11-20 22:55:05,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:05,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 61 letters. Loop has 8 letters. [2024-11-20 22:55:05,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:05,081 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 589 states and 714 transitions. [2024-11-20 22:55:05,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:05,088 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 589 states to 450 states and 574 transitions. [2024-11-20 22:55:05,088 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 160 [2024-11-20 22:55:05,088 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 163 [2024-11-20 22:55:05,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 450 states and 574 transitions. [2024-11-20 22:55:05,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:05,088 INFO L218 hiAutomatonCegarLoop]: Abstraction has 450 states and 574 transitions. [2024-11-20 22:55:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states and 574 transitions. [2024-11-20 22:55:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2024-11-20 22:55:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 276 states have (on average 1.0797101449275361) internal successors, (298), 290 states have internal predecessors, (298), 107 states have call successors, (111), 56 states have call predecessors, (111), 62 states have return successors, (159), 98 states have call predecessors, (159), 94 states have call successors, (159) [2024-11-20 22:55:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 568 transitions. [2024-11-20 22:55:05,098 INFO L240 hiAutomatonCegarLoop]: Abstraction has 445 states and 568 transitions. [2024-11-20 22:55:05,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:55:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 22:55:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-20 22:55:05,099 INFO L87 Difference]: Start difference. First operand 445 states and 568 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (14), 12 states have call predecessors, (14), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 22:55:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:55:05,354 INFO L93 Difference]: Finished difference Result 469 states and 569 transitions. [2024-11-20 22:55:05,354 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 469 states and 569 transitions. [2024-11-20 22:55:05,359 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-20 22:55:05,359 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 469 states to 0 states and 0 transitions. [2024-11-20 22:55:05,359 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-20 22:55:05,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-20 22:55:05,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-20 22:55:05,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-20 22:55:05,359 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:05,359 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 22:55:05,360 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:05,360 INFO L332 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2024-11-20 22:55:05,360 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-20 22:55:05,360 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-20 22:55:05,360 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-20 22:55:05,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 10:55:05 BoogieIcfgContainer [2024-11-20 22:55:05,366 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-20 22:55:05,367 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-20 22:55:05,367 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-20 22:55:05,367 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-20 22:55:05,367 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:56" (3/4) ... [2024-11-20 22:55:05,368 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-20 22:55:05,369 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-20 22:55:05,369 INFO L158 Benchmark]: Toolchain (without parser) took 9655.38ms. Allocated memory was 136.3MB in the beginning and 247.5MB in the end (delta: 111.1MB). Free memory was 81.3MB in the beginning and 106.3MB in the end (delta: -25.0MB). Peak memory consumption was 88.3MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 136.3MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.15ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 69.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.38ms. Allocated memory is still 136.3MB. Free memory was 69.4MB in the beginning and 67.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: Boogie Preprocessor took 20.08ms. Allocated memory is still 136.3MB. Free memory was 67.8MB in the beginning and 66.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: RCFGBuilder took 250.09ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 66.3MB in the beginning and 173.7MB in the end (delta: -107.4MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,370 INFO L158 Benchmark]: BuchiAutomizer took 9178.08ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 173.7MB in the beginning and 106.3MB in the end (delta: 67.5MB). Peak memory consumption was 109.4MB. Max. memory is 16.1GB. [2024-11-20 22:55:05,371 INFO L158 Benchmark]: Witness Printer took 2.68ms. Allocated memory is still 247.5MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 22:55:05,372 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 136.3MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.15ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 69.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.38ms. Allocated memory is still 136.3MB. Free memory was 69.4MB in the beginning and 67.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.08ms. Allocated memory is still 136.3MB. Free memory was 67.8MB in the beginning and 66.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 250.09ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 66.3MB in the beginning and 173.7MB in the end (delta: -107.4MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 9178.08ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 173.7MB in the beginning and 106.3MB in the end (delta: 67.5MB). Peak memory consumption was 109.4MB. Max. memory is 16.1GB. * Witness Printer took 2.68ms. Allocated memory is still 247.5MB. Free memory is still 106.3MB. 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 10 terminating modules (6 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 10 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. 6 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.1s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 5.1s. Construction of modules took 0.8s. Büchi inclusion checks took 2.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 92 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: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 517 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 485 mSDsluCounter, 720 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 509 mSDsCounter, 308 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1524 IncrementalHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 308 mSolverCounterUnsat, 211 mSDtfsCounter, 1524 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 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: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-11-20 22:55:05,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-20 22:55:05,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-20 22:55:05,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-20 22:55:05,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-20 22:55:06,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:06,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:06,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:06,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE