./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_10-1.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_10-1.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 acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 22:54:52,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 22:54:52,571 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-20 22:54:52,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 22:54:52,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 22:54:52,602 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 22:54:52,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 22:54:52,603 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 22:54:52,604 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 22:54:52,605 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 22:54:52,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 22:54:52,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 22:54:52,606 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 22:54:52,606 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-20 22:54:52,608 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-20 22:54:52,608 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-20 22:54:52,608 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-20 22:54:52,608 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-20 22:54:52,609 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-20 22:54:52,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 22:54:52,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-20 22:54:52,613 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 22:54:52,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 22:54:52,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 22:54:52,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 22:54:52,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-20 22:54:52,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-20 22:54:52,614 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-20 22:54:52,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 22:54:52,614 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 22:54:52,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 22:54:52,615 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 22:54:52,615 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-20 22:54:52,615 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 22:54:52,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 22:54:52,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 22:54:52,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 22:54:52,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 22:54:52,616 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-20 22:54:52,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 [2024-11-20 22:54:52,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 22:54:52,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 22:54:52,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 22:54:52,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 22:54:52,852 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 22:54:52,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2024-11-20 22:54:54,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 22:54:54,238 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 22:54:54,238 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2024-11-20 22:54:54,244 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02909b4b/6bdce27ea7b54a8aab28940d876d9396/FLAG0cc87ee60 [2024-11-20 22:54:54,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02909b4b/6bdce27ea7b54a8aab28940d876d9396 [2024-11-20 22:54:54,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 22:54:54,659 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 22:54:54,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 22:54:54,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 22:54:54,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 22:54:54,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732e39c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54, skipping insertion in model container [2024-11-20 22:54:54,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 22:54:54,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 22:54:54,875 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 22:54:54,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 22:54:54,898 INFO L204 MainTranslator]: Completed translation [2024-11-20 22:54:54,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54 WrapperNode [2024-11-20 22:54:54,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 22:54:54,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 22:54:54,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 22:54:54,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 22:54:54,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,919 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2024-11-20 22:54:54,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 22:54:54,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 22:54:54,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 22:54:54,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 22:54:54,926 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,927 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,934 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 22:54:54,934 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 22:54:54,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 22:54:54,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 22:54:54,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 22:54:54,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (1/1) ... [2024-11-20 22:54:54,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:54,966 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 22:54:54,968 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 22:54:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 22:54:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 22:54:55,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 22:54:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 22:54:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-20 22:54:55,004 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-20 22:54:55,046 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 22:54:55,048 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 22:54:55,116 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-20 22:54:55,117 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 22:54:55,125 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 22:54:55,126 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-20 22:54:55,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:55 BoogieIcfgContainer [2024-11-20 22:54:55,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 22:54:55,127 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-20 22:54:55,127 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-20 22:54:55,130 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-20 22:54:55,130 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:55,130 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 10:54:54" (1/3) ... [2024-11-20 22:54:55,131 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f3e2b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 10:54:55, skipping insertion in model container [2024-11-20 22:54:55,133 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:55,134 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:54:54" (2/3) ... [2024-11-20 22:54:55,134 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f3e2b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 10:54:55, skipping insertion in model container [2024-11-20 22:54:55,134 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-20 22:54:55,134 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:55" (3/3) ... [2024-11-20 22:54:55,135 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2024-11-20 22:54:55,186 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-20 22:54:55,187 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-20 22:54:55,187 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-20 22:54:55,187 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-20 22:54:55,188 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-20 22:54:55,188 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-20 22:54:55,188 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-20 22:54:55,188 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-20 22:54:55,195 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 22:54:55,217 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:55,217 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:55,218 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:55,222 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-20 22:54:55,222 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:54:55,223 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-20 22:54:55,223 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 22:54:55,225 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:55,225 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:55,225 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:55,225 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-20 22:54:55,225 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:54:55,231 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 22:54:55,231 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 22:54:55,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2024-11-20 22:54:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624827001] [2024-11-20 22:54:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:55,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2024-11-20 22:54:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518544371] [2024-11-20 22:54:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:55,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2024-11-20 22:54:55,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:55,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341343687] [2024-11-20 22:54:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:55,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:55,489 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:55,490 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:55,490 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:55,490 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:55,490 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:54:55,490 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,490 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:55,490 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:55,491 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2024-11-20 22:54:55,491 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:55,491 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:55,501 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,507 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,509 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,512 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,519 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,573 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:55,574 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:54:55,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,577 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 22:54:55,578 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 22:54:55,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:55,579 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:55,594 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:55,594 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 22:54:55,600 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 22:54:55,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,603 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 22:54:55,604 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 22:54:55,605 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:55,605 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:55,617 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:55,617 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 22:54:55,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2024-11-20 22:54:55,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,625 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 22:54:55,626 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 22:54:55,627 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:55,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:55,638 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:55,638 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 22:54:55,644 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 22:54:55,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,659 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 22:54:55,659 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 22:54:55,661 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:55,661 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:55,677 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 22:54:55,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,679 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 22:54:55,680 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 22:54:55,681 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:54:55,681 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:55,724 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:54:55,728 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 22:54:55,728 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:55,729 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:55,729 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:55,729 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:55,729 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:54:55,729 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,729 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:55,729 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:55,729 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2024-11-20 22:54:55,729 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:55,729 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:55,730 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,743 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,745 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,748 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,757 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:55,800 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:55,804 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:54:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,806 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 22:54:55,806 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 22:54:55,808 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 22:54:55,819 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:55,819 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:55,820 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:55,820 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:55,820 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:55,821 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:55,821 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:55,823 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,832 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 22:54:55,833 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 22:54:55,834 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 22:54:55,843 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:55,844 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:55,844 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:55,844 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:55,844 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:55,845 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:55,845 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:55,846 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:55,852 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 22:54:55,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,853 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 22:54:55,854 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 22:54:55,855 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 22:54:55,865 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:55,865 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:55,865 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:55,865 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:55,865 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:55,866 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:55,866 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:55,867 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:55,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,876 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 22:54:55,877 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 22:54:55,878 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 22:54:55,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:55,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:55,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:55,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:55,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:55,890 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:55,890 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:55,893 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:54:55,896 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:54:55,896 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:54:55,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:55,915 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 22:54:55,916 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 22:54:55,920 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:54:55,920 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:54:55,920 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:54:55,921 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-20 22:54:55,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2024-11-20 22:54:55,930 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:54:55,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:55,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 22:54:55,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:54:56,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:56,044 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 22:54:56,067 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 22:54:56,068 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 22:54:56,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2024-11-20 22:54:56,184 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 22:54:56,187 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 22:54:56,191 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 22:54:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2024-11-20 22:54:56,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 4 letters. [2024-11-20 22:54:56,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:56,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 7 letters. Loop has 4 letters. [2024-11-20 22:54:56,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:56,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 8 letters. [2024-11-20 22:54:56,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:56,194 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 54 transitions. [2024-11-20 22:54:56,199 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 23 states and 31 transitions. [2024-11-20 22:54:56,203 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2024-11-20 22:54:56,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-11-20 22:54:56,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 31 transitions. [2024-11-20 22:54:56,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:56,204 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-20 22:54:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 31 transitions. [2024-11-20 22:54:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-20 22:54:56,223 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 22:54:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-20 22:54:56,225 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-20 22:54:56,225 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-20 22:54:56,226 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-20 22:54:56,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2024-11-20 22:54:56,226 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,226 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:56,226 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:56,227 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:56,227 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:56,228 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#$Ultimate##0 ~n := #in~n; 125#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 132#fiboEXIT >#35#return; 127#L13-1 [2024-11-20 22:54:56,228 INFO L747 eck$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 22:54:56,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2024-11-20 22:54:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875034416] [2024-11-20 22:54:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-20 22:54:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,343 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 22:54:56,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875034416] [2024-11-20 22:54:56,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875034416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:54:56,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:54:56,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:54:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381252400] [2024-11-20 22:54:56,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:54:56,349 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:56,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2024-11-20 22:54:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852890581] [2024-11-20 22:54:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:54:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,418 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 22:54:56,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:56,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852890581] [2024-11-20 22:54:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852890581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:54:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:54:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:54:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457026695] [2024-11-20 22:54:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:54:56,419 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:54:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 22:54:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 22:54:56,422 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 22:54:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:56,484 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-20 22:54:56,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2024-11-20 22:54:56,485 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,486 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2024-11-20 22:54:56,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-11-20 22:54:56,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-11-20 22:54:56,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2024-11-20 22:54:56,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:56,486 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2024-11-20 22:54:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-20 22:54:56,489 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 22:54:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-20 22:54:56,490 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:54:56,491 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-20 22:54:56,491 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-20 22:54:56,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2024-11-20 22:54:56,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:56,492 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:56,492 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:56,492 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:56,492 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:56,493 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 22:54:56,493 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 22:54:56,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2024-11-20 22:54:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783265491] [2024-11-20 22:54:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-20 22:54:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,595 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 22:54:56,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:56,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783265491] [2024-11-20 22:54:56,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783265491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:56,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392551082] [2024-11-20 22:54:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,600 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 22:54:56,600 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 22:54:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:56,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:56,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:56,650 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 22:54:56,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:56,760 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 22:54:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392551082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:56,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:56,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-20 22:54:56,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112986510] [2024-11-20 22:54:56,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:56,761 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:56,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2024-11-20 22:54:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283908213] [2024-11-20 22:54:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:54:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:54:56,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:54:56,857 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:56,857 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:56,857 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:56,857 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:56,857 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:54:56,857 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,857 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:56,857 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:56,858 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2024-11-20 22:54:56,858 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:56,858 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:56,858 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,861 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,862 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,864 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,868 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:56,895 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:56,895 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:54:56,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,897 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 22:54:56,898 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 22:54:56,899 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,899 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,910 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,910 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 22:54:56,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:56,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,917 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 22:54:56,917 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 22:54:56,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,929 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,929 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 22:54:56,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:56,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,936 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 22:54:56,937 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 22:54:56,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,938 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,949 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:54:56,949 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 22:54:56,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2024-11-20 22:54:56,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,962 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 22:54:56,963 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 22:54:56,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:54:56,967 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:56,985 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 22:54:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:56,987 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 22:54:56,988 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 22:54:56,989 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:54:56,989 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:54:57,001 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:54:57,008 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 22:54:57,009 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:54:57,009 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:54:57,009 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:54:57,009 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:54:57,009 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:54:57,010 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,010 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:54:57,010 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:54:57,010 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2024-11-20 22:54:57,010 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:54:57,010 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:54:57,010 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,017 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,019 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,020 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,023 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:54:57,060 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:54:57,060 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:54:57,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,062 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 22:54:57,063 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 22:54:57,064 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 22:54:57,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:57,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:57,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:57,074 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:57,074 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:57,075 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:57,076 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:57,077 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:57,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2024-11-20 22:54:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,085 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 22:54:57,087 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 22:54:57,088 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 22:54:57,097 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:57,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:57,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:57,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:57,098 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:57,098 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:57,098 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:57,100 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:57,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2024-11-20 22:54:57,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,108 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 22:54:57,109 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 22:54:57,109 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 22:54:57,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:57,119 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:57,119 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:57,119 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:57,119 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:57,120 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:57,120 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:57,121 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:57,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,127 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 22:54:57,128 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 22:54:57,130 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 22:54:57,140 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:57,141 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:57,141 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:57,141 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:57,141 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:57,141 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:57,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:57,142 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:54:57,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2024-11-20 22:54:57,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,149 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 22:54:57,150 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 22:54:57,151 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 22:54:57,161 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:54:57,161 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:54:57,161 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:54:57,161 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:54:57,161 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:54:57,162 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:54:57,162 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:54:57,163 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:54:57,165 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:54:57,166 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:54:57,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:54:57,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,168 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 22:54:57,169 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 22:54:57,169 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:54:57,169 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:54:57,169 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:54:57,169 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-20 22:54:57,175 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 22:54:57,176 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:54:57,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,363 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 22:54:57,364 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 22:54:57,364 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 22:54:57,535 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 22:54:57,555 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 22:54:57,555 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 22:54:57,556 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 22:54:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 40 transitions. [2024-11-20 22:54:57,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 12 letters. Loop has 10 letters. [2024-11-20 22:54:57,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 22 letters. Loop has 10 letters. [2024-11-20 22:54:57,558 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,558 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 40 transitions. Stem has 12 letters. Loop has 20 letters. [2024-11-20 22:54:57,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:54:57,559 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 178 transitions. [2024-11-20 22:54:57,563 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:57,567 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 105 states and 151 transitions. [2024-11-20 22:54:57,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 62 [2024-11-20 22:54:57,567 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2024-11-20 22:54:57,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 151 transitions. [2024-11-20 22:54:57,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:57,568 INFO L218 hiAutomatonCegarLoop]: Abstraction has 105 states and 151 transitions. [2024-11-20 22:54:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 151 transitions. [2024-11-20 22:54:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2024-11-20 22:54:57,576 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 22:54:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2024-11-20 22:54:57,577 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94 states and 128 transitions. [2024-11-20 22:54:57,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:57,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 22:54:57,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-20 22:54:57,577 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 22:54:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:57,678 INFO L93 Difference]: Finished difference Result 119 states and 163 transitions. [2024-11-20 22:54:57,678 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 163 transitions. [2024-11-20 22:54:57,681 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:57,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 158 transitions. [2024-11-20 22:54:57,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2024-11-20 22:54:57,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2024-11-20 22:54:57,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 158 transitions. [2024-11-20 22:54:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:57,686 INFO L218 hiAutomatonCegarLoop]: Abstraction has 114 states and 158 transitions. [2024-11-20 22:54:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 158 transitions. [2024-11-20 22:54:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2024-11-20 22:54:57,692 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 22:54:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 143 transitions. [2024-11-20 22:54:57,693 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 143 transitions. [2024-11-20 22:54:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 22:54:57,694 INFO L425 stractBuchiCegarLoop]: Abstraction has 106 states and 143 transitions. [2024-11-20 22:54:57,694 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-20 22:54:57,694 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 143 transitions. [2024-11-20 22:54:57,696 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-20 22:54:57,696 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:57,696 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:57,697 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:57,697 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1] [2024-11-20 22:54:57,697 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 22:54:57,697 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 22:54:57,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 870102534, now seen corresponding path program 1 times [2024-11-20 22:54:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973739958] [2024-11-20 22:54:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-20 22:54:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,866 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 22:54:57,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973739958] [2024-11-20 22:54:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973739958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992518834] [2024-11-20 22:54:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:57,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:57,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:57,869 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 22:54:57,870 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 22:54:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:57,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 22:54:57,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:57,940 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 22:54:57,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:58,172 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 22:54:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992518834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:58,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2024-11-20 22:54:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136576424] [2024-11-20 22:54:58,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:58,173 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:58,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1138642743, now seen corresponding path program 1 times [2024-11-20 22:54:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149456972] [2024-11-20 22:54:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:54:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,251 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 22:54:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149456972] [2024-11-20 22:54:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149456972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676651569] [2024-11-20 22:54:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,254 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 22:54:58,254 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 22:54:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 22:54:58,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:58,315 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 22:54:58,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:58,418 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 22:54:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676651569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:58,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:58,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 22:54:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159472772] [2024-11-20 22:54:58,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:58,419 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:54:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 22:54:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 22:54:58,420 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 22:54:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:58,489 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-20 22:54:58,490 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 76 transitions. [2024-11-20 22:54:58,491 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:58,491 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 54 states and 70 transitions. [2024-11-20 22:54:58,492 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2024-11-20 22:54:58,492 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-20 22:54:58,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2024-11-20 22:54:58,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:58,492 INFO L218 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2024-11-20 22:54:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-20 22:54:58,495 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 22:54:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-20 22:54:58,498 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 22:54:58,499 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-20 22:54:58,499 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-20 22:54:58,500 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2024-11-20 22:54:58,501 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:58,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:58,501 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:58,502 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:58,502 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2024-11-20 22:54:58,502 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#$Ultimate##0 ~n := #in~n; 1408#L8 assume ~n < 1;#res := 0; 1407#fiboFINAL assume true; 1401#fiboEXIT >#37#return; 1399#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1397#fiboFINAL assume true; 1394#fiboEXIT >#35#return; 1368#L13-1 [2024-11-20 22:54:58,502 INFO L747 eck$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 22:54:58,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 870102534, now seen corresponding path program 2 times [2024-11-20 22:54:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076195137] [2024-11-20 22:54:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-20 22:54:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,658 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 22:54:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076195137] [2024-11-20 22:54:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076195137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058464377] [2024-11-20 22:54:58,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 22:54:58,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:58,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:58,661 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 22:54:58,662 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 22:54:58,692 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 22:54:58,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:54:58,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 22:54:58,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:58,730 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 22:54:58,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:58,921 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 22:54:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058464377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:58,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2024-11-20 22:54:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952387080] [2024-11-20 22:54:58,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:58,923 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:54:58,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1083596768, now seen corresponding path program 1 times [2024-11-20 22:54:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053151549] [2024-11-20 22:54:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-20 22:54:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:58,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-20 22:54:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,023 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 22:54:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053151549] [2024-11-20 22:54:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053151549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995007649] [2024-11-20 22:54:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:59,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:59,026 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 22:54:59,026 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 22:54:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 22:54:59,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:59,085 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 22:54:59,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:54:59,273 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 22:54:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995007649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:54:59,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:54:59,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 14 [2024-11-20 22:54:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669755826] [2024-11-20 22:54:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:54:59,274 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-20 22:54:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:54:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 22:54:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-20 22:54:59,275 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 22:54:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:54:59,545 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-11-20 22:54:59,545 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 110 states and 129 transitions. [2024-11-20 22:54:59,546 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:59,547 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 110 states to 99 states and 118 transitions. [2024-11-20 22:54:59,547 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 72 [2024-11-20 22:54:59,547 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 72 [2024-11-20 22:54:59,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 118 transitions. [2024-11-20 22:54:59,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:54:59,548 INFO L218 hiAutomatonCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:54:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states and 118 transitions. [2024-11-20 22:54:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-20 22:54:59,552 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 22:54:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2024-11-20 22:54:59,553 INFO L240 hiAutomatonCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:54:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 22:54:59,554 INFO L425 stractBuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2024-11-20 22:54:59,555 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-20 22:54:59,555 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2024-11-20 22:54:59,556 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-20 22:54:59,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:54:59,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:54:59,558 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:54:59,558 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-20 22:54:59,558 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 22:54:59,558 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 22:54:59,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:54:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash -683438758, now seen corresponding path program 3 times [2024-11-20 22:54:59,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:54:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060621788] [2024-11-20 22:54:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:54:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:54:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-20 22:54:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:54:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:54:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:54:59,799 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 22:54:59,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:54:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060621788] [2024-11-20 22:54:59,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060621788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:54:59,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349153152] [2024-11-20 22:54:59,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 22:54:59,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:54:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:54:59,803 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 22:54:59,805 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 22:54:59,839 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-20 22:54:59,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:54:59,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 22:54:59,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:54:59,909 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 22:54:59,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:00,151 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 22:55:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349153152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:00,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:00,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2024-11-20 22:55:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694144153] [2024-11-20 22:55:00,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:00,152 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:55:00,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 2 times [2024-11-20 22:55:00,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:00,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605000688] [2024-11-20 22:55:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:00,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:00,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:55:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:00,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:55:00,368 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:00,368 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:00,368 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:00,368 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:00,368 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:55:00,368 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,368 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:00,368 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:00,368 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2024-11-20 22:55:00,369 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:00,369 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:00,369 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,377 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,379 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,381 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,417 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:00,417 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:55:00,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,420 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 22:55:00,421 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 22:55:00,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:00,422 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:00,446 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 22:55:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,447 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 22:55:00,449 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 22:55:00,450 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:55:00,450 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:00,583 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:55:00,590 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 22:55:00,590 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:00,590 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:00,590 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:00,590 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:00,590 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:55:00,590 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,590 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:00,590 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:00,590 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2024-11-20 22:55:00,590 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:00,590 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:00,591 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,598 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,600 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,603 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:00,643 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:00,643 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:55:00,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,645 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 22:55:00,646 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 22:55:00,647 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 22:55:00,657 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:00,657 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:00,657 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:00,657 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:00,657 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:00,659 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:00,659 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:00,661 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:55:00,663 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-20 22:55:00,663 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-20 22:55:00,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:00,665 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 22:55:00,666 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 22:55:00,667 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:55:00,667 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:55:00,667 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:55:00,667 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-20 22:55:00,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:00,674 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:55:00,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:00,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:00,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:00,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,007 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 22:55:01,008 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 22:55:01,008 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 22:55:01,081 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 22:55:01,083 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 22:55:01,083 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 22:55:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-20 22:55:01,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:01,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:01,084 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:01,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:01,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:01,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:01,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:01,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,419 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 22:55:01,420 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 22:55:01,420 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 22:55:01,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2024-11-20 22:55:01,513 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 22:55:01,513 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 22:55:01,514 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 22:55:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-20 22:55:01,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:01,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:01,514 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:01,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:01,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:01,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:01,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 22:55:01,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:01,789 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 22:55:01,790 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 22:55:01,790 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 22:55:01,977 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 22:55:01,979 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 22:55:01,979 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 22:55:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 45 transitions. [2024-11-20 22:55:01,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 48 letters. Loop has 22 letters. [2024-11-20 22:55:01,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:01,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 70 letters. Loop has 22 letters. [2024-11-20 22:55:01,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:01,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 48 letters. Loop has 44 letters. [2024-11-20 22:55:01,982 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:01,982 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 697 transitions. [2024-11-20 22:55:01,988 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:01,999 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 382 states and 513 transitions. [2024-11-20 22:55:02,000 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 161 [2024-11-20 22:55:02,001 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 186 [2024-11-20 22:55:02,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 382 states and 513 transitions. [2024-11-20 22:55:02,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:02,003 INFO L218 hiAutomatonCegarLoop]: Abstraction has 382 states and 513 transitions. [2024-11-20 22:55:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states and 513 transitions. [2024-11-20 22:55:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 337. [2024-11-20 22:55:02,026 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 22:55:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 435 transitions. [2024-11-20 22:55:02,031 INFO L240 hiAutomatonCegarLoop]: Abstraction has 337 states and 435 transitions. [2024-11-20 22:55:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:55:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 22:55:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-20 22:55:02,031 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 22:55:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:55:02,296 INFO L93 Difference]: Finished difference Result 462 states and 593 transitions. [2024-11-20 22:55:02,296 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 593 transitions. [2024-11-20 22:55:02,302 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:02,308 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 455 states and 580 transitions. [2024-11-20 22:55:02,308 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 210 [2024-11-20 22:55:02,308 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 210 [2024-11-20 22:55:02,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 455 states and 580 transitions. [2024-11-20 22:55:02,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:02,309 INFO L218 hiAutomatonCegarLoop]: Abstraction has 455 states and 580 transitions. [2024-11-20 22:55:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states and 580 transitions. [2024-11-20 22:55:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 435. [2024-11-20 22:55:02,327 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 22:55:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 558 transitions. [2024-11-20 22:55:02,331 INFO L240 hiAutomatonCegarLoop]: Abstraction has 435 states and 558 transitions. [2024-11-20 22:55:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 22:55:02,332 INFO L425 stractBuchiCegarLoop]: Abstraction has 435 states and 558 transitions. [2024-11-20 22:55:02,332 INFO L332 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2024-11-20 22:55:02,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 435 states and 558 transitions. [2024-11-20 22:55:02,334 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:02,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-20 22:55:02,334 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-20 22:55:02,335 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 12, 11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:55:02,335 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-20 22:55:02,336 INFO L745 eck$LassoCheckResult]: Stem: 4929#$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); 4930#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; 4907#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 4908#$Ultimate##0 ~n := #in~n; 4982#L8 assume !(~n < 1); 4981#L10 assume !(1 == ~n); 4977#L13 call #t~ret4 := fibo(~n - 1);< 4980#$Ultimate##0 ~n := #in~n; 4979#L8 assume !(~n < 1); 4978#L10 assume !(1 == ~n); 4973#L13 call #t~ret4 := fibo(~n - 1);< 4976#$Ultimate##0 ~n := #in~n; 4975#L8 assume !(~n < 1); 4974#L10 assume !(1 == ~n); 4969#L13 call #t~ret4 := fibo(~n - 1);< 4972#$Ultimate##0 ~n := #in~n; 4971#L8 assume !(~n < 1); 4970#L10 assume !(1 == ~n); 4965#L13 call #t~ret4 := fibo(~n - 1);< 4968#$Ultimate##0 ~n := #in~n; 4967#L8 assume !(~n < 1); 4966#L10 assume !(1 == ~n); 4961#L13 call #t~ret4 := fibo(~n - 1);< 4964#$Ultimate##0 ~n := #in~n; 4963#L8 assume !(~n < 1); 4962#L10 assume !(1 == ~n); 4959#L13 call #t~ret4 := fibo(~n - 1);< 4958#$Ultimate##0 ~n := #in~n; 4960#L8 assume !(~n < 1); 5258#L10 assume !(1 == ~n); 4953#L13 call #t~ret4 := fibo(~n - 1);< 4952#$Ultimate##0 ~n := #in~n; 4956#L8 assume !(~n < 1); 4957#L10 assume !(1 == ~n); 4954#L13 call #t~ret4 := fibo(~n - 1);< 4952#$Ultimate##0 ~n := #in~n; 4956#L8 assume !(~n < 1); 4957#L10 assume !(1 == ~n); 4954#L13 call #t~ret4 := fibo(~n - 1);< 4952#$Ultimate##0 ~n := #in~n; 4955#L8 assume !(~n < 1); 5281#L10 assume 1 == ~n;#res := 1; 5279#fiboFINAL assume true; 5278#fiboEXIT >#35#return; 5276#L13-1 call #t~ret5 := fibo(~n - 2);< 5277#$Ultimate##0 ~n := #in~n; 5282#L8 assume ~n < 1;#res := 0; 5280#fiboFINAL assume true; 5275#fiboEXIT >#37#return; 5274#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5273#fiboFINAL assume true; 5271#fiboEXIT >#35#return; 5231#L13-1 call #t~ret5 := fibo(~n - 2);< 5235#$Ultimate##0 ~n := #in~n; 5267#L8 assume !(~n < 1); 5266#L10 assume !(1 == ~n); 4903#L13 call #t~ret4 := fibo(~n - 1);< 5261#$Ultimate##0 ~n := #in~n; 5269#L8 assume !(~n < 1); 5268#L10 assume !(1 == ~n); 5002#L13 call #t~ret4 := fibo(~n - 1);< 5009#$Ultimate##0 [2024-11-20 22:55:02,336 INFO L747 eck$LassoCheckResult]: Loop: 5009#$Ultimate##0 ~n := #in~n; 5014#L8 assume !(~n < 1); 5012#L10 assume !(1 == ~n); 4999#L13 call #t~ret4 := fibo(~n - 1);< 5009#$Ultimate##0 [2024-11-20 22:55:02,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -366223317, now seen corresponding path program 4 times [2024-11-20 22:55:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079104351] [2024-11-20 22:55:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-20 22:55:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 22:55:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 22:55:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:02,573 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 22:55:02,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:55:02,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079104351] [2024-11-20 22:55:02,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079104351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 22:55:02,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53405985] [2024-11-20 22:55:02,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 22:55:02,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 22:55:02,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:02,575 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 22:55:02,576 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 22:55:02,617 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 22:55:02,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 22:55:02,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 22:55:02,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:02,690 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 22:55:02,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 22:55:02,867 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 22:55:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53405985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 22:55:02,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 22:55:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 24 [2024-11-20 22:55:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949942101] [2024-11-20 22:55:02,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 22:55:02,868 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-20 22:55:02,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2024-11-20 22:55:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:55:02,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822424125] [2024-11-20 22:55:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:55:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:55:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:02,871 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 22:55:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 22:55:02,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 22:55:02,898 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:02,898 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:02,898 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:02,898 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:02,898 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-20 22:55:02,898 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:02,898 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:02,898 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:02,898 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2024-11-20 22:55:02,898 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:02,898 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:02,899 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:02,900 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:02,901 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:02,902 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:02,904 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:02,924 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:02,924 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-20 22:55:02,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:02,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:02,927 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 22:55:02,928 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 22:55:02,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:02,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:02,939 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:02,940 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 22:55:02,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2024-11-20 22:55:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:02,946 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 22:55:02,947 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 22:55:02,948 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:02,948 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:02,958 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:02,958 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 22:55:02,964 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 22:55:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:02,965 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 22:55:02,966 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 22:55:02,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:02,967 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:02,978 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:02,978 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 22:55:02,983 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 22:55:02,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:02,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:02,985 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 22:55:02,986 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 22:55:02,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:02,986 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:02,997 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-20 22:55:02,997 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 22:55:03,003 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 22:55:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,005 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 22:55:03,005 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 22:55:03,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-20 22:55:03,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:03,024 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 22:55:03,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,026 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 22:55:03,026 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 22:55:03,028 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-20 22:55:03,028 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-20 22:55:03,070 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-20 22:55:03,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2024-11-20 22:55:03,074 INFO L204 LassoAnalysis]: Preferences: [2024-11-20 22:55:03,074 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-20 22:55:03,075 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-20 22:55:03,075 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-20 22:55:03,075 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-20 22:55:03,075 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,075 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-20 22:55:03,075 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-20 22:55:03,075 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2024-11-20 22:55:03,075 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-20 22:55:03,075 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-20 22:55:03,075 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,080 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,082 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,087 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,088 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-20 22:55:03,110 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-20 22:55:03,111 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-20 22:55:03,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,112 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 22:55:03,113 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 22:55:03,114 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 22:55:03,123 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:03,124 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:03,124 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:03,124 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:03,124 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:03,124 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:03,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:03,125 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:55:03,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2024-11-20 22:55:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,132 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 22:55:03,133 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 22:55:03,134 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 22:55:03,143 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:03,143 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:03,143 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:03,143 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:03,143 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:03,144 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:03,144 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:03,145 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-20 22:55:03,150 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 22:55:03,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,152 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 22:55:03,153 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 22:55:03,154 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 22:55:03,164 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-20 22:55:03,165 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-20 22:55:03,165 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-20 22:55:03,165 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-20 22:55:03,165 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-20 22:55:03,166 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-20 22:55:03,166 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-20 22:55:03,167 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-20 22:55:03,170 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-20 22:55:03,170 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-20 22:55:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-20 22:55:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 22:55:03,173 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 22:55:03,173 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 22:55:03,174 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-20 22:55:03,174 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-20 22:55:03,174 INFO L474 LassoAnalysis]: Proved termination. [2024-11-20 22:55:03,174 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-20 22:55:03,182 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 22:55:03,182 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-20 22:55:03,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,404 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 22:55:03,405 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 22:55:03,405 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 22:55:03,452 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 22:55:03,453 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 22:55:03,453 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 22:55:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-20 22:55:03,454 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:03,454 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:03,454 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:03,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:03,478 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 22:55:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,697 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 22:55:03,697 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 22:55:03,697 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 22:55:03,738 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 22:55:03,739 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 22:55:03,741 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 22:55:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2024-11-20 22:55:03,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:03,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:03,741 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-20 22:55:03,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:55:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:55:03,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 22:55:03,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 22:55:03,977 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 22:55:03,978 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 22:55:03,978 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 22:55:04,036 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 22:55:04,037 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 22:55:04,037 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 22:55:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2024-11-20 22:55:04,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 61 letters. Loop has 4 letters. [2024-11-20 22:55:04,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:04,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 65 letters. Loop has 4 letters. [2024-11-20 22:55:04,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:04,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 61 letters. Loop has 8 letters. [2024-11-20 22:55:04,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-20 22:55:04,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 589 states and 714 transitions. [2024-11-20 22:55:04,043 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-20 22:55:04,047 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 589 states to 450 states and 574 transitions. [2024-11-20 22:55:04,047 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 160 [2024-11-20 22:55:04,047 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 163 [2024-11-20 22:55:04,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 450 states and 574 transitions. [2024-11-20 22:55:04,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-20 22:55:04,048 INFO L218 hiAutomatonCegarLoop]: Abstraction has 450 states and 574 transitions. [2024-11-20 22:55:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states and 574 transitions. [2024-11-20 22:55:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2024-11-20 22:55:04,059 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 22:55:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 568 transitions. [2024-11-20 22:55:04,061 INFO L240 hiAutomatonCegarLoop]: Abstraction has 445 states and 568 transitions. [2024-11-20 22:55:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:55:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 22:55:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-20 22:55:04,062 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 22:55:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 22:55:04,323 INFO L93 Difference]: Finished difference Result 469 states and 569 transitions. [2024-11-20 22:55:04,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 469 states and 569 transitions. [2024-11-20 22:55:04,327 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-20 22:55:04,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 469 states to 0 states and 0 transitions. [2024-11-20 22:55:04,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-20 22:55:04,328 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-20 22:55:04,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-20 22:55:04,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-20 22:55:04,328 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:04,328 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 22:55:04,329 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 22:55:04,329 INFO L332 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2024-11-20 22:55:04,329 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-20 22:55:04,329 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-20 22:55:04,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-20 22:55:04,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 10:55:04 BoogieIcfgContainer [2024-11-20 22:55:04,336 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-20 22:55:04,336 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-20 22:55:04,336 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-20 22:55:04,336 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-20 22:55:04,337 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:54:55" (3/4) ... [2024-11-20 22:55:04,338 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-20 22:55:04,339 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-20 22:55:04,340 INFO L158 Benchmark]: Toolchain (without parser) took 9680.59ms. Allocated memory was 138.4MB in the beginning and 234.9MB in the end (delta: 96.5MB). Free memory was 69.5MB in the beginning and 78.5MB in the end (delta: -9.0MB). Peak memory consumption was 89.5MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,340 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 22:55:04,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.16ms. Allocated memory was 138.4MB in the beginning and 195.0MB in the end (delta: 56.6MB). Free memory was 69.3MB in the beginning and 165.6MB in the end (delta: -96.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,340 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.88ms. Allocated memory is still 195.0MB. Free memory was 165.6MB in the beginning and 164.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 22:55:04,341 INFO L158 Benchmark]: Boogie Preprocessor took 20.28ms. Allocated memory is still 195.0MB. Free memory was 164.6MB in the beginning and 162.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,341 INFO L158 Benchmark]: RCFGBuilder took 185.73ms. Allocated memory is still 195.0MB. Free memory was 162.5MB in the beginning and 152.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,342 INFO L158 Benchmark]: BuchiAutomizer took 9209.06ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 152.0MB in the beginning and 79.5MB in the end (delta: 72.5MB). Peak memory consumption was 112.4MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,342 INFO L158 Benchmark]: Witness Printer took 3.19ms. Allocated memory is still 234.9MB. Free memory was 79.5MB in the beginning and 78.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 22:55:04,343 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.16ms. Allocated memory was 138.4MB in the beginning and 195.0MB in the end (delta: 56.6MB). Free memory was 69.3MB in the beginning and 165.6MB in the end (delta: -96.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.88ms. Allocated memory is still 195.0MB. Free memory was 165.6MB in the beginning and 164.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.28ms. Allocated memory is still 195.0MB. Free memory was 164.6MB in the beginning and 162.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 185.73ms. Allocated memory is still 195.0MB. Free memory was 162.5MB in the beginning and 152.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 9209.06ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 152.0MB in the beginning and 79.5MB in the end (delta: 72.5MB). Peak memory consumption was 112.4MB. Max. memory is 16.1GB. * Witness Printer took 3.19ms. Allocated memory is still 234.9MB. Free memory was 79.5MB in the beginning and 78.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 5.0s. Construction of modules took 0.8s. Büchi inclusion checks took 3.0s. 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, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 485 mSDsluCounter, 720 SdHoareTripleChecker+Invalid, 0.9s 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 22:55:04,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-20 22:55:04,960 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 22:55:05,161 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 22:55:05,360 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 22:55:05,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 22:55:05,762 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