./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 08:49:48,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 08:49:48,756 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-17 08:49:48,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 08:49:48,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 08:49:48,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder.Remove goto edges from RCFG [2024-11-17 08:49:48,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 08:49:48,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 08:49:48,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 08:49:48,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 08:49:48,789 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 08:49:48,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 08:49:48,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 08:49:48,791 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 08:49:48,793 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-17 08:49:48,793 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-17 08:49:48,793 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-17 08:49:48,793 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-17 08:49:48,794 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-17 08:49:48,794 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-17 08:49:48,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 08:49:48,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-17 08:49:48,797 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 08:49:48,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 08:49:48,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 08:49:48,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 08:49:48,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-17 08:49:48,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-17 08:49:48,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-17 08:49:48,798 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 08:49:48,799 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 08:49:48,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 08:49:48,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 08:49:48,799 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-17 08:49:48,799 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 08:49:48,800 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 08:49:48,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 08:49:48,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 08:49:48,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 08:49:48,801 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-17 08:49:48,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2024-11-17 08:49:49,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 08:49:49,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 08:49:49,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 08:49:49,040 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 08:49:49,041 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 08:49:49,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2024-11-17 08:49:50,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 08:49:50,584 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 08:49:50,585 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2024-11-17 08:49:50,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d26684b/25ba9d131a144839846154e3a7c172bd/FLAGc66d43680 [2024-11-17 08:49:50,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d26684b/25ba9d131a144839846154e3a7c172bd [2024-11-17 08:49:50,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 08:49:50,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 08:49:50,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 08:49:50,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 08:49:50,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 08:49:50,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4514d806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50, skipping insertion in model container [2024-11-17 08:49:50,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 08:49:50,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 08:49:50,761 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 08:49:50,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 08:49:50,786 INFO L204 MainTranslator]: Completed translation [2024-11-17 08:49:50,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50 WrapperNode [2024-11-17 08:49:50,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 08:49:50,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 08:49:50,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 08:49:50,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 08:49:50,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,808 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2024-11-17 08:49:50,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 08:49:50,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 08:49:50,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 08:49:50,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 08:49:50,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,829 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-17 08:49:50,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,831 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 08:49:50,836 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 08:49:50,836 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 08:49:50,837 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 08:49:50,837 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (1/1) ... [2024-11-17 08:49:50,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:50,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:50,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-11-17 08:49:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 08:49:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 08:49:50,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 08:49:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 08:49:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-17 08:49:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-17 08:49:50,964 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 08:49:50,966 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 08:49:51,049 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2024-11-17 08:49:51,055 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-17 08:49:51,055 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 08:49:51,064 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 08:49:51,064 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 08:49:51,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:51 BoogieIcfgContainer [2024-11-17 08:49:51,065 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 08:49:51,065 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-17 08:49:51,065 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-17 08:49:51,068 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-17 08:49:51,069 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:51,069 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 17.11 08:49:50" (1/3) ... [2024-11-17 08:49:51,070 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@20807357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 17.11 08:49:51, skipping insertion in model container [2024-11-17 08:49:51,070 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:51,070 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 08:49:50" (2/3) ... [2024-11-17 08:49:51,092 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@20807357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 17.11 08:49:51, skipping insertion in model container [2024-11-17 08:49:51,092 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-17 08:49:51,092 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:51" (3/3) ... [2024-11-17 08:49:51,094 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2024-11-17 08:49:51,137 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-17 08:49:51,137 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-17 08:49:51,137 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-17 08:49:51,137 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-17 08:49:51,137 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-17 08:49:51,137 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-17 08:49:51,138 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-17 08:49:51,138 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-17 08:49:51,141 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-17 08:49:51,168 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:51,168 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:51,168 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:51,181 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-17 08:49:51,181 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-17 08:49:51,181 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-17 08:49:51,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-17 08:49:51,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:51,184 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:51,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:51,185 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-17 08:49:51,185 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-17 08:49:51,189 INFO L745 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 12#ULTIMATE.init_returnLabel#1true assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 18#L27-1true call main_#t~ret6#1 := fibo(main_~x~0#1);< 7#fiboENTRYtrue [2024-11-17 08:49:51,190 INFO L747 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 9#L10true assume !(1 == ~n); 19#L13-3true call #t~ret4 := fibo(~n - 1);< 7#fiboENTRYtrue [2024-11-17 08:49:51,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 39702, now seen corresponding path program 1 times [2024-11-17 08:49:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676755537] [2024-11-17 08:49:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,281 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:51,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:51,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1538184, now seen corresponding path program 1 times [2024-11-17 08:49:51,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:51,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6304974] [2024-11-17 08:49:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:51,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:51,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1988460259, now seen corresponding path program 1 times [2024-11-17 08:49:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:51,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874603225] [2024-11-17 08:49:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,333 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:51,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:51,456 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:51,457 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:51,457 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:51,457 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:51,457 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:49:51,457 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,457 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:51,458 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:51,458 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2024-11-17 08:49:51,458 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:51,458 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:51,472 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,483 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,489 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,492 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,495 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,558 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:51,559 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:49:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2024-11-17 08:49:51,566 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:51,566 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,580 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:51,580 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:51,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2024-11-17 08:49:51,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2024-11-17 08:49:51,597 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:51,597 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,608 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:51,608 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:51,619 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 [2024-11-17 08:49:51,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2024-11-17 08:49:51,624 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:51,625 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,636 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:51,636 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:51,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2024-11-17 08:49:51,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2024-11-17 08:49:51,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:51,657 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,678 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:51,678 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:51,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:51,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2024-11-17 08:49:51,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:51,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2024-11-17 08:49:51,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2024-11-17 08:49:51,727 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:49:51,727 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:51,785 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:49:51,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2024-11-17 08:49:51,791 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:51,791 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:51,791 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:51,791 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:51,791 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:49:51,791 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,791 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:51,792 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:51,792 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2024-11-17 08:49:51,792 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:51,792 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:51,793 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,796 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,798 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,801 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,803 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:51,839 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:51,842 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:49:51,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2024-11-17 08:49:51,850 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:51,866 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:51,866 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:51,867 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:51,867 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:51,867 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:51,869 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:51,869 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:51,875 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:51,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2024-11-17 08:49:51,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2024-11-17 08:49:51,892 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:51,902 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:51,902 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:51,902 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:51,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:51,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:51,903 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:51,903 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:51,904 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2024-11-17 08:49:51,918 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:51,928 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:51,929 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:51,929 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:51,929 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:51,929 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:51,929 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:51,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:51,933 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:51,943 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 [2024-11-17 08:49:51,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2024-11-17 08:49:51,952 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:51,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:51,962 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:51,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:51,962 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:51,962 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:51,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:51,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:51,964 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:51,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2024-11-17 08:49:51,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:51,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2024-11-17 08:49:51,979 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:51,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:51,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:51,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:51,989 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:51,989 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:51,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:51,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:51,993 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:49:51,996 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:49:51,996 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:49:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:52,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2024-11-17 08:49:52,004 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:49:52,004 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:49:52,004 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:49:52,005 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-17 08:49:52,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2024-11-17 08:49:52,018 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:49:52,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 08:49:52,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 08:49:52,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:52,152 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2024-11-17 08:49:52,153 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 08:49:52,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2024-11-17 08:49:52,309 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 41 states and 54 transitions. Complement of second has 16 states. [2024-11-17 08:49:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 08:49:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2024-11-17 08:49:52,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 4 letters. [2024-11-17 08:49:52,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:52,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 7 letters. Loop has 4 letters. [2024-11-17 08:49:52,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:52,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 8 letters. [2024-11-17 08:49:52,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:52,319 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 54 transitions. [2024-11-17 08:49:52,321 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:52,325 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 23 states and 31 transitions. [2024-11-17 08:49:52,326 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2024-11-17 08:49:52,326 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-11-17 08:49:52,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 31 transitions. [2024-11-17 08:49:52,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:52,328 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-17 08:49:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 31 transitions. [2024-11-17 08:49:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-17 08:49:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 08:49:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-17 08:49:52,349 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-17 08:49:52,349 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-17 08:49:52,349 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-17 08:49:52,349 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2024-11-17 08:49:52,350 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:52,350 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:52,350 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:52,351 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:52,351 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:52,351 INFO L745 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 121#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 124#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 129#fiboENTRY ~n := #in~n; 130#L8 assume !(~n < 1); 134#L10 assume !(1 == ~n); 123#L13-3 call #t~ret4 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 132#L8 assume ~n < 1;#res := 0; 127#fiboFINAL assume true; 128#fiboEXIT >#27#return; 122#L13-2 [2024-11-17 08:49:52,351 INFO L747 eck$LassoCheckResult]: Loop: 122#L13-2 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 139#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 125#L13-3 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 139#L8 assume ~n < 1;#res := 0; 136#fiboFINAL assume true; 137#fiboEXIT >#27#return; 122#L13-2 [2024-11-17 08:49:52,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1475604923, now seen corresponding path program 1 times [2024-11-17 08:49:52,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:52,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118932670] [2024-11-17 08:49:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-17 08:49:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 08:49:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118932670] [2024-11-17 08:49:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118932670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 08:49:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 08:49:52,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 08:49:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525552518] [2024-11-17 08:49:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 08:49:52,517 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:49:52,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash 93365724, now seen corresponding path program 1 times [2024-11-17 08:49:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:52,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077561001] [2024-11-17 08:49:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-17 08:49:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 08:49:52,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077561001] [2024-11-17 08:49:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077561001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 08:49:52,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 08:49:52,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 08:49:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372683866] [2024-11-17 08:49:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 08:49:52,598 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-17 08:49:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 08:49:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 08:49:52,601 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-17 08:49:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:52,659 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-17 08:49:52,659 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2024-11-17 08:49:52,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:52,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2024-11-17 08:49:52,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-11-17 08:49:52,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-11-17 08:49:52,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2024-11-17 08:49:52,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:52,663 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2024-11-17 08:49:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-17 08:49:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-17 08:49:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-17 08:49:52,666 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 08:49:52,672 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-17 08:49:52,673 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-17 08:49:52,673 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2024-11-17 08:49:52,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:52,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:52,673 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:52,674 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:52,674 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-17 08:49:52,674 INFO L745 eck$LassoCheckResult]: Stem: 191#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 192#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 193#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 208#fiboENTRY ~n := #in~n; 200#L8 assume !(~n < 1); 206#L10 assume !(1 == ~n); 196#L13-3 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 201#L8 assume !(~n < 1); 205#L10 assume 1 == ~n;#res := 1; 207#fiboFINAL assume true; 204#fiboEXIT >#27#return; 194#L13-2 [2024-11-17 08:49:52,674 INFO L747 eck$LassoCheckResult]: Loop: 194#L13-2 call #t~ret5 := fibo(~n - 2);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 195#L13-3 call #t~ret4 := fibo(~n - 1);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 195#L13-3 call #t~ret4 := fibo(~n - 1);< 197#fiboENTRY ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume 1 == ~n;#res := 1; 202#fiboFINAL assume true; 203#fiboEXIT >#27#return; 194#L13-2 call #t~ret5 := fibo(~n - 2);< 197#fiboENTRY ~n := #in~n; 198#L8 assume ~n < 1;#res := 0; 213#fiboFINAL assume true; 211#fiboEXIT >#25#return; 209#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 210#fiboFINAL assume true; 214#fiboEXIT >#27#return; 194#L13-2 [2024-11-17 08:49:52,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1500686953, now seen corresponding path program 1 times [2024-11-17 08:49:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:52,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095389967] [2024-11-17 08:49:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:52,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-17 08:49:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:52,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:52,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095389967] [2024-11-17 08:49:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095389967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:49:52,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222488133] [2024-11-17 08:49:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:52,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:49:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:52,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:49:52,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 08:49:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:52,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:49:52,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:52,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:49:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 08:49:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222488133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:49:52,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:49:52,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-17 08:49:52,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879987079] [2024-11-17 08:49:52,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:49:52,864 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-17 08:49:52,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 1 times [2024-11-17 08:49:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:52,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769860869] [2024-11-17 08:49:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:52,871 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:52,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:53,336 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:53,336 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:53,336 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:53,336 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:53,336 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:49:53,336 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:53,336 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:53,336 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:53,336 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2024-11-17 08:49:53,336 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:53,336 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:53,337 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:53,344 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:53,347 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:53,363 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:53,417 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:53,418 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:49:53,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:53,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:53,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2024-11-17 08:49:53,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:53,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:53,437 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:53,437 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:53,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2024-11-17 08:49:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:53,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:53,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2024-11-17 08:49:53,472 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:53,472 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:53,483 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:53,484 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:53,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:53,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:53,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2024-11-17 08:49:53,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:53,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:53,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2024-11-17 08:49:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:53,539 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:53,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2024-11-17 08:49:53,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:49:53,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:54,001 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:49:54,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:54,007 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:54,007 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:54,007 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:54,007 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:54,008 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:49:54,008 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:54,008 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:54,008 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:54,008 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2024-11-17 08:49:54,008 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:54,008 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:54,009 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:54,018 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:54,020 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:54,023 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:54,068 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:54,068 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:49:54,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:54,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:54,070 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2024-11-17 08:49:54,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:54,082 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:54,082 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:54,082 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:54,082 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:54,083 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:54,084 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:54,084 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:54,086 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:49:54,089 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:49:54,089 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:49:54,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:54,091 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:54,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2024-11-17 08:49:54,093 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:49:54,093 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:49:54,093 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:49:54,094 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-17 08:49:54,106 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 [2024-11-17 08:49:54,106 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:49:54,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:49:54,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:54,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2024-11-17 08:49:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:49:54,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:49:54,483 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:49:54,484 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 08:49:54,658 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 152 states and 210 transitions. Complement of second has 54 states. [2024-11-17 08:49:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 08:49:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 40 transitions. [2024-11-17 08:49:54,660 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 22 letters. [2024-11-17 08:49:54,660 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:54,660 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 34 letters. Loop has 22 letters. [2024-11-17 08:49:54,661 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:54,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 44 letters. [2024-11-17 08:49:54,661 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:54,662 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 152 states and 210 transitions. [2024-11-17 08:49:54,666 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:54,669 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 152 states to 125 states and 179 transitions. [2024-11-17 08:49:54,669 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 72 [2024-11-17 08:49:54,669 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2024-11-17 08:49:54,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 179 transitions. [2024-11-17 08:49:54,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:54,670 INFO L218 hiAutomatonCegarLoop]: Abstraction has 125 states and 179 transitions. [2024-11-17 08:49:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states and 179 transitions. [2024-11-17 08:49:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2024-11-17 08:49:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (35), 22 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-17 08:49:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2024-11-17 08:49:54,679 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 142 transitions. [2024-11-17 08:49:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:54,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 08:49:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-17 08:49:54,680 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-17 08:49:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:54,770 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2024-11-17 08:49:54,770 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2024-11-17 08:49:54,772 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:54,775 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 130 states and 178 transitions. [2024-11-17 08:49:54,775 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2024-11-17 08:49:54,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 81 [2024-11-17 08:49:54,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 178 transitions. [2024-11-17 08:49:54,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:54,776 INFO L218 hiAutomatonCegarLoop]: Abstraction has 130 states and 178 transitions. [2024-11-17 08:49:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states and 178 transitions. [2024-11-17 08:49:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2024-11-17 08:49:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 78 states have internal predecessors, (89), 28 states have call successors, (29), 15 states have call predecessors, (29), 16 states have return successors, (39), 24 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-17 08:49:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2024-11-17 08:49:54,784 INFO L240 hiAutomatonCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-17 08:49:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 08:49:54,785 INFO L425 stractBuchiCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-17 08:49:54,785 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-17 08:49:54,785 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 157 transitions. [2024-11-17 08:49:54,786 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-17 08:49:54,786 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:54,786 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:54,787 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:54,787 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1] [2024-11-17 08:49:54,787 INFO L745 eck$LassoCheckResult]: Stem: 881#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 882#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 884#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 916#fiboENTRY ~n := #in~n; 950#L8 assume !(~n < 1); 949#L10 assume !(1 == ~n); 894#L13-3 call #t~ret4 := fibo(~n - 1);< 893#fiboENTRY ~n := #in~n; 895#L8 assume !(~n < 1); 908#L10 assume !(1 == ~n); 915#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 948#L8 assume !(~n < 1); 946#L10 assume 1 == ~n;#res := 1; 944#fiboFINAL assume true; 942#fiboEXIT >#27#return; 887#L13-2 call #t~ret5 := fibo(~n - 2);< 941#fiboENTRY ~n := #in~n; 996#L8 assume ~n < 1;#res := 0; 995#fiboFINAL assume true; 994#fiboEXIT >#25#return; 992#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 989#fiboFINAL assume true; 979#fiboEXIT >#27#return; 912#L13-2 [2024-11-17 08:49:54,788 INFO L747 eck$LassoCheckResult]: Loop: 912#L13-2 call #t~ret5 := fibo(~n - 2);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume !(1 == ~n); 911#L13-3 call #t~ret4 := fibo(~n - 1);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume !(1 == ~n); 911#L13-3 call #t~ret4 := fibo(~n - 1);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 914#fiboFINAL assume true; 983#fiboEXIT >#27#return; 912#L13-2 call #t~ret5 := fibo(~n - 2);< 917#fiboENTRY ~n := #in~n; 987#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 914#fiboFINAL assume true; 983#fiboEXIT >#25#return; 981#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 988#fiboFINAL assume true; 980#fiboEXIT >#27#return; 912#L13-2 [2024-11-17 08:49:54,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 1 times [2024-11-17 08:49:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:54,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019879671] [2024-11-17 08:49:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:54,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:54,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:54,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1547808212, now seen corresponding path program 1 times [2024-11-17 08:49:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:54,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142624186] [2024-11-17 08:49:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-17 08:49:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:49:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:49:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 08:49:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142624186] [2024-11-17 08:49:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142624186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:49:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725165689] [2024-11-17 08:49:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:49:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:54,899 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:49:54,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 08:49:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:54,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 08:49:54,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 08:49:54,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:49:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 08:49:55,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725165689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:49:55,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:49:55,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-17 08:49:55,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133515696] [2024-11-17 08:49:55,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:49:55,057 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-17 08:49:55,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 08:49:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 08:49:55,057 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. cyclomatic complexity: 44 Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 08:49:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:55,124 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-17 08:49:55,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 76 transitions. [2024-11-17 08:49:55,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:55,126 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 54 states and 70 transitions. [2024-11-17 08:49:55,126 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2024-11-17 08:49:55,126 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-17 08:49:55,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2024-11-17 08:49:55,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:55,126 INFO L218 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:49:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2024-11-17 08:49:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-17 08:49:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-17 08:49:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-17 08:49:55,130 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:49:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 08:49:55,131 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-17 08:49:55,131 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-17 08:49:55,131 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2024-11-17 08:49:55,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-17 08:49:55,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-17 08:49:55,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-17 08:49:55,132 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 08:49:55,133 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-17 08:49:55,133 INFO L745 eck$LassoCheckResult]: Stem: 1239#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1240#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 1241#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1263#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1275#L10 assume !(1 == ~n); 1250#L13-3 call #t~ret4 := fibo(~n - 1);< 1249#fiboENTRY ~n := #in~n; 1251#L8 assume !(~n < 1); 1258#L10 assume !(1 == ~n); 1261#L13-3 call #t~ret4 := fibo(~n - 1);< 1266#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1281#L10 assume !(1 == ~n); 1260#L13-3 call #t~ret4 := fibo(~n - 1);< 1266#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1281#L10 assume !(1 == ~n); 1260#L13-3 call #t~ret4 := fibo(~n - 1);< 1266#fiboENTRY ~n := #in~n; 1273#L8 assume !(~n < 1); 1259#L10 assume 1 == ~n;#res := 1; 1262#fiboFINAL assume true; 1280#fiboEXIT >#27#return; 1255#L13-2 call #t~ret5 := fibo(~n - 2);< 1291#fiboENTRY ~n := #in~n; 1292#L8 assume ~n < 1;#res := 0; 1290#fiboFINAL assume true; 1254#fiboEXIT >#25#return; 1256#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1288#fiboFINAL assume true; 1287#fiboEXIT >#27#return; 1244#L13-2 [2024-11-17 08:49:55,133 INFO L747 eck$LassoCheckResult]: Loop: 1244#L13-2 call #t~ret5 := fibo(~n - 2);< 1265#fiboENTRY ~n := #in~n; 1282#L8 assume !(~n < 1); 1268#L10 assume !(1 == ~n); 1243#L13-3 call #t~ret4 := fibo(~n - 1);< 1265#fiboENTRY ~n := #in~n; 1282#L8 assume !(~n < 1); 1268#L10 assume !(1 == ~n); 1243#L13-3 call #t~ret4 := fibo(~n - 1);< 1265#fiboENTRY ~n := #in~n; 1282#L8 assume !(~n < 1); 1268#L10 assume 1 == ~n;#res := 1; 1269#fiboFINAL assume true; 1277#fiboEXIT >#27#return; 1242#L13-2 call #t~ret5 := fibo(~n - 2);< 1247#fiboENTRY ~n := #in~n; 1248#L8 assume ~n < 1;#res := 0; 1257#fiboFINAL assume true; 1285#fiboEXIT >#25#return; 1267#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1252#fiboFINAL assume true; 1253#fiboEXIT >#27#return; 1244#L13-2 [2024-11-17 08:49:55,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 2 times [2024-11-17 08:49:55,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:55,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406074843] [2024-11-17 08:49:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:55,151 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:55,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:55,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 2 times [2024-11-17 08:49:55,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303928076] [2024-11-17 08:49:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:55,164 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 08:49:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 08:49:55,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 08:49:55,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash 55729554, now seen corresponding path program 3 times [2024-11-17 08:49:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 08:49:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101397930] [2024-11-17 08:49:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 08:49:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 08:49:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 08:49:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:49:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:49:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-17 08:49:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-17 08:49:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-17 08:49:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 34 proven. 64 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-17 08:49:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 08:49:55,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101397930] [2024-11-17 08:49:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101397930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 08:49:55,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618657768] [2024-11-17 08:49:55,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 08:49:55,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 08:49:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 08:49:55,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 08:49:55,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-17 08:49:55,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 08:49:55,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:49:55,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-17 08:49:55,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 08:49:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 70 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-17 08:49:55,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618657768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 08:49:55,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 08:49:55,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 22 [2024-11-17 08:49:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861277752] [2024-11-17 08:49:55,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 08:49:55,803 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:55,803 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:55,803 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:55,804 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:55,804 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-17 08:49:55,804 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,804 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:55,804 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:55,804 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2024-11-17 08:49:55,804 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:55,804 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:55,804 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:55,806 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:55,808 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:55,816 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:55,851 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:55,851 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-17 08:49:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,853 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) [2024-11-17 08:49:55,858 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 [2024-11-17 08:49:55,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:55,859 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:55,871 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:55,871 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:55,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:55,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,884 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2024-11-17 08:49:55,888 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:55,888 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:55,903 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-17 08:49:55,903 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-17 08:49:55,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:55,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2024-11-17 08:49:55,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-17 08:49:55,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:55,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:55,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:55,949 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:55,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2024-11-17 08:49:55,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-17 08:49:55,951 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-17 08:49:56,400 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-17 08:49:56,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:56,405 INFO L204 LassoAnalysis]: Preferences: [2024-11-17 08:49:56,406 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-17 08:49:56,406 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-17 08:49:56,406 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-17 08:49:56,406 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-17 08:49:56,406 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,406 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-17 08:49:56,406 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-17 08:49:56,406 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2024-11-17 08:49:56,406 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-17 08:49:56,406 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-17 08:49:56,407 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,410 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,412 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,414 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-17 08:49:56,456 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-17 08:49:56,456 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-17 08:49:56,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,459 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:56,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2024-11-17 08:49:56,468 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:56,485 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,485 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,485 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,485 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,485 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,486 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,486 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,487 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2024-11-17 08:49:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,499 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:56,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2024-11-17 08:49:56,501 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:56,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,513 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,514 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2024-11-17 08:49:56,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,527 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) [2024-11-17 08:49:56,528 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 [2024-11-17 08:49:56,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:56,539 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,539 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,539 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,539 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,539 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,540 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,540 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,545 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-17 08:49:56,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2024-11-17 08:49:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,559 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:56,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2024-11-17 08:49:56,566 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2024-11-17 08:49:56,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-17 08:49:56,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-17 08:49:56,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-17 08:49:56,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-17 08:49:56,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-17 08:49:56,583 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-17 08:49:56,583 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-17 08:49:56,587 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-17 08:49:56,590 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-17 08:49:56,592 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-17 08:49:56,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-17 08:49:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 08:49:56,594 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-17 08:49:56,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2024-11-17 08:49:56,597 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-17 08:49:56,597 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-17 08:49:56,597 INFO L474 LassoAnalysis]: Proved termination. [2024-11-17 08:49:56,598 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-17 08:49:56,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2024-11-17 08:49:56,612 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-17 08:49:56,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:56,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:49:56,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:56,855 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 [2024-11-17 08:49:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:56,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:49:56,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:49:57,022 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:49:57,022 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,092 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 77 transitions. Complement of second has 11 states. [2024-11-17 08:49:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-17 08:49:57,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:49:57,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,094 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:49:57,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:49:57,366 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:49:57,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,434 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 77 transitions. Complement of second has 11 states. [2024-11-17 08:49:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-17 08:49:57,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:49:57,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,436 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-17 08:49:57,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 08:49:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 08:49:57,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 08:49:57,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 08:49:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 08:49:57,707 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2024-11-17 08:49:57,707 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,903 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 70 transitions. cyclomatic complexity: 18. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 408 states and 526 transitions. Complement of second has 132 states. [2024-11-17 08:49:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2024-11-17 08:49:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 08:49:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 45 transitions. [2024-11-17 08:49:57,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-17 08:49:57,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 54 letters. Loop has 22 letters. [2024-11-17 08:49:57,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 44 letters. [2024-11-17 08:49:57,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-17 08:49:57,906 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 526 transitions. [2024-11-17 08:49:57,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-17 08:49:57,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 259 states and 359 transitions. [2024-11-17 08:49:57,915 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2024-11-17 08:49:57,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2024-11-17 08:49:57,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 359 transitions. [2024-11-17 08:49:57,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-17 08:49:57,915 INFO L218 hiAutomatonCegarLoop]: Abstraction has 259 states and 359 transitions. [2024-11-17 08:49:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states and 359 transitions. [2024-11-17 08:49:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 187. [2024-11-17 08:49:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 122 states have internal predecessors, (131), 43 states have call successors, (48), 25 states have call predecessors, (48), 29 states have return successors, (67), 39 states have call predecessors, (67), 39 states have call successors, (67) [2024-11-17 08:49:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 246 transitions. [2024-11-17 08:49:57,928 INFO L240 hiAutomatonCegarLoop]: Abstraction has 187 states and 246 transitions. [2024-11-17 08:49:57,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 08:49:57,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 08:49:57,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-17 08:49:57,929 INFO L87 Difference]: Start difference. First operand 187 states and 246 transitions. Second operand has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 13 states have call successors, (17), 7 states have call predecessors, (17), 3 states have return successors, (10), 5 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-17 08:49:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 08:49:58,201 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2024-11-17 08:49:58,201 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 136 states and 141 transitions. [2024-11-17 08:49:58,202 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-17 08:49:58,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 136 states to 0 states and 0 transitions. [2024-11-17 08:49:58,202 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-17 08:49:58,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-17 08:49:58,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-17 08:49:58,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-17 08:49:58,203 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:49:58,203 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:49:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-17 08:49:58,204 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-17 08:49:58,204 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-17 08:49:58,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-17 08:49:58,204 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-17 08:49:58,204 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-17 08:49:58,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 17.11 08:49:58 BoogieIcfgContainer [2024-11-17 08:49:58,210 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-17 08:49:58,211 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-17 08:49:58,211 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-17 08:49:58,211 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-17 08:49:58,211 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 08:49:51" (3/4) ... [2024-11-17 08:49:58,213 INFO L146 WitnessPrinter]: No result that supports witness generation found [2024-11-17 08:49:58,214 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-17 08:49:58,214 INFO L158 Benchmark]: Toolchain (without parser) took 7610.59ms. Allocated memory was 161.5MB in the beginning and 220.2MB in the end (delta: 58.7MB). Free memory was 91.4MB in the beginning and 145.5MB in the end (delta: -54.0MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2024-11-17 08:49:58,215 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 117.4MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:49:58,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.56ms. Allocated memory is still 161.5MB. Free memory was 91.2MB in the beginning and 79.4MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-17 08:49:58,215 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.46ms. Allocated memory is still 161.5MB. Free memory was 79.4MB in the beginning and 77.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-17 08:49:58,215 INFO L158 Benchmark]: Boogie Preprocessor took 25.53ms. Allocated memory is still 161.5MB. Free memory was 77.9MB in the beginning and 76.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:49:58,215 INFO L158 Benchmark]: IcfgBuilder took 228.47ms. Allocated memory is still 161.5MB. Free memory was 76.4MB in the beginning and 66.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-17 08:49:58,216 INFO L158 Benchmark]: BuchiAutomizer took 7144.97ms. Allocated memory was 161.5MB in the beginning and 220.2MB in the end (delta: 58.7MB). Free memory was 66.0MB in the beginning and 145.5MB in the end (delta: -79.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:49:58,216 INFO L158 Benchmark]: Witness Printer took 3.19ms. Allocated memory is still 220.2MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-17 08:49:58,217 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 117.4MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.56ms. Allocated memory is still 161.5MB. Free memory was 91.2MB in the beginning and 79.4MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.46ms. Allocated memory is still 161.5MB. Free memory was 79.4MB in the beginning and 77.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.53ms. Allocated memory is still 161.5MB. Free memory was 77.9MB in the beginning and 76.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 228.47ms. Allocated memory is still 161.5MB. Free memory was 76.4MB in the beginning and 66.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 7144.97ms. Allocated memory was 161.5MB in the beginning and 220.2MB in the end (delta: 58.7MB). Free memory was 66.0MB in the beginning and 145.5MB in the end (delta: -79.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.19ms. Allocated memory is still 220.2MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (4 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 5 locations. One deterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. 4 modules have a trivial ranking function, the largest among these consists of 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.0s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 4.2s. Construction of modules took 0.4s. Büchi inclusion checks took 2.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 106 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 243 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 228 mSDsluCounter, 375 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 247 mSDsCounter, 147 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 765 IncrementalHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 147 mSolverCounterUnsat, 128 mSDtfsCounter, 765 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT1 SILN0 SILU0 SILI1 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf100 lsp91 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq172 hnf95 smp66 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-11-17 08:49:58,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:58,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-17 08:49:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 08:49:58,842 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