./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 023d838f 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_5-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 23:17:20,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 23:17:20,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-10 23:17:20,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 23:17:20,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 23:17:20,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder.Remove goto edges from RCFG [2024-11-10 23:17:20,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 23:17:20,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 23:17:20,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 23:17:20,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 23:17:20,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 23:17:20,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 23:17:20,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 23:17:20,636 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 23:17:20,636 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-10 23:17:20,637 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-10 23:17:20,637 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-10 23:17:20,637 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-10 23:17:20,638 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-10 23:17:20,638 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-10 23:17:20,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 23:17:20,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-10 23:17:20,643 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 23:17:20,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 23:17:20,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 23:17:20,644 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 23:17:20,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-10 23:17:20,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-10 23:17:20,645 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-10 23:17:20,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 23:17:20,646 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 23:17:20,647 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 23:17:20,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 23:17:20,647 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-10 23:17:20,648 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 23:17:20,648 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 23:17:20,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 23:17:20,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 23:17:20,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 23:17:20,649 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-10 23:17:20,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 [2024-11-10 23:17:20,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 23:17:20,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 23:17:20,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 23:17:20,934 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 23:17:20,935 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 23:17:20,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-11-10 23:17:22,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 23:17:22,576 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 23:17:22,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-11-10 23:17:22,595 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec45fcdb6/038001683c4649fca7467a10730cba76/FLAGb1bfa7c2e [2024-11-10 23:17:22,936 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec45fcdb6/038001683c4649fca7467a10730cba76 [2024-11-10 23:17:22,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 23:17:22,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 23:17:22,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 23:17:22,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 23:17:22,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 23:17:22,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:17:22" (1/1) ... [2024-11-10 23:17:22,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48825469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:22, skipping insertion in model container [2024-11-10 23:17:22,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:17:22" (1/1) ... [2024-11-10 23:17:22,967 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 23:17:23,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 23:17:23,153 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 23:17:23,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 23:17:23,183 INFO L204 MainTranslator]: Completed translation [2024-11-10 23:17:23,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23 WrapperNode [2024-11-10 23:17:23,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 23:17:23,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 23:17:23,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 23:17:23,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 23:17:23,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,223 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2024-11-10 23:17:23,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 23:17:23,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 23:17:23,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 23:17:23,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 23:17:23,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,245 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]. [2024-11-10 23:17:23,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,247 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 23:17:23,251 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 23:17:23,251 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 23:17:23,252 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 23:17:23,252 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (1/1) ... [2024-11-10 23:17:23,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:23,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:23,283 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) [2024-11-10 23:17:23,285 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 [2024-11-10 23:17:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 23:17:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 23:17:23,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 23:17:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 23:17:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-10 23:17:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-10 23:17:23,388 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 23:17:23,390 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 23:17:23,462 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2024-11-10 23:17:23,469 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-10 23:17:23,469 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 23:17:23,483 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 23:17:23,483 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 23:17:23,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 11:17:23 BoogieIcfgContainer [2024-11-10 23:17:23,484 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 23:17:23,485 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-10 23:17:23,485 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-10 23:17:23,490 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-10 23:17:23,491 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-10 23:17:23,491 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 10.11 11:17:22" (1/3) ... [2024-11-10 23:17:23,492 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b2499f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 11:17:23, skipping insertion in model container [2024-11-10 23:17:23,493 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-10 23:17:23,493 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:17:23" (2/3) ... [2024-11-10 23:17:23,493 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b2499f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 11:17:23, skipping insertion in model container [2024-11-10 23:17:23,494 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-10 23:17:23,494 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 11:17:23" (3/3) ... [2024-11-10 23:17:23,495 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2024-11-10 23:17:23,551 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-10 23:17:23,551 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-10 23:17:23,552 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-10 23:17:23,552 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-10 23:17:23,553 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-10 23:17:23,553 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-10 23:17:23,553 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-10 23:17:23,554 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-10 23:17:23,558 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) [2024-11-10 23:17:23,590 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:23,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:23,590 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:23,597 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-10 23:17:23,598 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-10 23:17:23,598 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-10 23:17:23,599 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) [2024-11-10 23:17:23,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:23,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:23,601 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:23,601 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-10 23:17:23,601 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2024-11-10 23:17:23,607 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 [2024-11-10 23:17:23,607 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 [2024-11-10 23:17:23,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:23,618 INFO L85 PathProgramCache]: Analyzing trace with hash 39702, now seen corresponding path program 1 times [2024-11-10 23:17:23,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:23,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310219091] [2024-11-10 23:17:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,730 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:23,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1538184, now seen corresponding path program 1 times [2024-11-10 23:17:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:23,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309754351] [2024-11-10 23:17:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,786 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:23,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1988460259, now seen corresponding path program 1 times [2024-11-10 23:17:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:23,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219719173] [2024-11-10 23:17:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,816 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:23,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:23,953 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:23,953 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:23,954 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:23,954 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:23,954 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-10 23:17:23,954 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:23,954 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:23,954 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:23,955 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2024-11-10 23:17:23,955 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:23,955 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:23,970 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:23,978 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:23,981 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:23,984 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:23,987 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,070 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:24,071 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-10 23:17:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,076 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) [2024-11-10 23:17:24,077 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 [2024-11-10 23:17:24,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:24,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,100 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:24,100 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:24,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:24,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,114 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) [2024-11-10 23:17:24,116 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 [2024-11-10 23:17:24,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:24,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,131 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:24,132 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:24,146 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 [2024-11-10 23:17:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,150 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) [2024-11-10 23:17:24,152 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 [2024-11-10 23:17:24,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:24,154 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,171 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:24,172 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:24,183 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 [2024-11-10 23:17:24,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,185 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) [2024-11-10 23:17:24,186 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 [2024-11-10 23:17:24,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:24,187 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,199 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:24,199 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:24,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2024-11-10 23:17:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,217 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) [2024-11-10 23:17:24,219 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 [2024-11-10 23:17:24,219 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:24,220 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,250 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 [2024-11-10 23:17:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,252 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) [2024-11-10 23:17:24,254 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 [2024-11-10 23:17:24,256 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-10 23:17:24,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:24,321 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-10 23:17:24,325 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 [2024-11-10 23:17:24,326 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:24,326 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:24,327 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:24,327 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:24,327 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-10 23:17:24,327 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,327 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:24,327 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:24,327 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2024-11-10 23:17:24,327 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:24,327 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:24,330 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,334 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,338 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,343 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,345 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:24,407 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:24,412 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-10 23:17:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,415 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) [2024-11-10 23:17:24,416 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 [2024-11-10 23:17:24,417 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 [2024-11-10 23:17:24,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:24,429 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:24,429 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:24,429 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:24,429 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:24,431 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:24,431 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:24,433 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:24,446 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 [2024-11-10 23:17:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,448 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) [2024-11-10 23:17:24,449 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 [2024-11-10 23:17:24,450 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 [2024-11-10 23:17:24,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:24,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:24,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:24,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:24,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:24,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:24,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:24,464 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:24,475 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 [2024-11-10 23:17:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,477 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) [2024-11-10 23:17:24,478 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 [2024-11-10 23:17:24,478 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 [2024-11-10 23:17:24,490 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:24,490 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:24,490 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:24,490 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:24,490 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:24,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:24,491 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:24,495 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:24,507 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 [2024-11-10 23:17:24,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,509 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) [2024-11-10 23:17:24,510 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 [2024-11-10 23:17:24,511 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 [2024-11-10 23:17:24,521 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:24,522 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:24,522 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:24,522 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:24,522 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:24,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:24,523 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:24,524 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:24,534 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 [2024-11-10 23:17:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,537 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) [2024-11-10 23:17:24,538 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 [2024-11-10 23:17:24,538 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 [2024-11-10 23:17:24,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:24,550 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:24,550 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:24,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:24,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:24,551 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:24,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:24,553 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-10 23:17:24,563 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-10 23:17:24,563 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-10 23:17:24,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:24,567 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) [2024-11-10 23:17:24,569 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 [2024-11-10 23:17:24,570 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-10 23:17:24,571 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-10 23:17:24,571 INFO L474 LassoAnalysis]: Proved termination. [2024-11-10 23:17:24,571 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2024-11-10 23:17:24,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:24,588 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-10 23:17:24,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:24,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 23:17:24,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:24,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 23:17:24,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 23:17:24,738 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 [2024-11-10 23:17:24,740 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) [2024-11-10 23:17:24,835 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. [2024-11-10 23:17:24,837 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 [2024-11-10 23:17:24,842 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) [2024-11-10 23:17:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2024-11-10 23:17:24,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 4 letters. [2024-11-10 23:17:24,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:24,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 7 letters. Loop has 4 letters. [2024-11-10 23:17:24,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:24,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 3 letters. Loop has 8 letters. [2024-11-10 23:17:24,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:24,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 41 states and 54 transitions. [2024-11-10 23:17:24,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:24,854 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 41 states to 23 states and 31 transitions. [2024-11-10 23:17:24,855 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2024-11-10 23:17:24,855 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-11-10 23:17:24,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 31 transitions. [2024-11-10 23:17:24,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:24,856 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-10 23:17:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 31 transitions. [2024-11-10 23:17:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-10 23:17:24,878 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) [2024-11-10 23:17:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-10 23:17:24,881 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-10 23:17:24,882 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-10 23:17:24,882 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-10 23:17:24,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2024-11-10 23:17:24,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:24,884 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:24,884 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:24,885 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 23:17:24,886 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 23:17:24,886 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 [2024-11-10 23:17:24,886 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 [2024-11-10 23:17:24,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1475604923, now seen corresponding path program 1 times [2024-11-10 23:17:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:24,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927279532] [2024-11-10 23:17:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-10 23:17:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-10 23:17:25,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 23:17:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927279532] [2024-11-10 23:17:25,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927279532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 23:17:25,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 23:17:25,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 23:17:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992443096] [2024-11-10 23:17:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 23:17:25,052 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-10 23:17:25,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash 93365724, now seen corresponding path program 1 times [2024-11-10 23:17:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:25,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581796011] [2024-11-10 23:17:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-10 23:17:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-10 23:17:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 23:17:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581796011] [2024-11-10 23:17:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581796011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 23:17:25,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 23:17:25,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 23:17:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052021972] [2024-11-10 23:17:25,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 23:17:25,155 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-10 23:17:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 23:17:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 23:17:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 23:17:25,159 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) [2024-11-10 23:17:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 23:17:25,238 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-10 23:17:25,239 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2024-11-10 23:17:25,240 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:25,241 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2024-11-10 23:17:25,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-11-10 23:17:25,242 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-11-10 23:17:25,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2024-11-10 23:17:25,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:25,243 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-10 23:17:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2024-11-10 23:17:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-10 23:17:25,247 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) [2024-11-10 23:17:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-10 23:17:25,249 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-10 23:17:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 23:17:25,250 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-10 23:17:25,250 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-10 23:17:25,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2024-11-10 23:17:25,251 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:25,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:25,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:25,252 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 23:17:25,252 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-10 23:17:25,252 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 [2024-11-10 23:17:25,252 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 [2024-11-10 23:17:25,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1500686953, now seen corresponding path program 1 times [2024-11-10 23:17:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:25,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888657657] [2024-11-10 23:17:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-10 23:17:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 23:17:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 23:17:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888657657] [2024-11-10 23:17:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888657657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 23:17:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331286404] [2024-11-10 23:17:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:25,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 23:17:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:25,379 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) [2024-11-10 23:17:25,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 23:17:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:25,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 23:17:25,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:25,470 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 [2024-11-10 23:17:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 23:17:25,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 23:17:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 23:17:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331286404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 23:17:25,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 23:17:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-10 23:17:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875282295] [2024-11-10 23:17:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 23:17:25,635 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-10 23:17:25,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 1 times [2024-11-10 23:17:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:25,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753096364] [2024-11-10 23:17:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:25,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:25,658 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:25,960 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:25,961 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:25,961 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:25,961 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:25,961 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-10 23:17:25,961 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:25,961 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:25,961 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:25,961 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2024-11-10 23:17:25,961 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:25,961 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:25,962 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:25,966 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:25,968 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:25,979 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:26,031 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:26,031 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-10 23:17:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,058 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) [2024-11-10 23:17:26,059 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 [2024-11-10 23:17:26,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:26,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:26,071 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:26,071 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:26,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,083 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) [2024-11-10 23:17:26,084 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 [2024-11-10 23:17:26,085 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:26,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:26,096 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:26,096 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:26,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2024-11-10 23:17:26,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,108 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) [2024-11-10 23:17:26,109 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 [2024-11-10 23:17:26,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:26,110 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:26,146 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 [2024-11-10 23:17:26,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,149 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) [2024-11-10 23:17:26,150 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 [2024-11-10 23:17:26,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-10 23:17:26,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:26,616 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-10 23:17:26,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2024-11-10 23:17:26,621 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:26,622 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:26,622 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:26,622 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:26,622 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-10 23:17:26,622 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,622 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:26,622 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:26,622 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2024-11-10 23:17:26,622 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:26,622 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:26,623 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:26,637 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:26,639 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:26,642 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:26,690 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:26,690 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-10 23:17:26,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,692 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) [2024-11-10 23:17:26,694 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 [2024-11-10 23:17:26,696 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 [2024-11-10 23:17:26,708 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:26,708 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:26,708 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:26,708 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:26,708 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:26,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:26,711 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:26,714 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-10 23:17:26,718 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-10 23:17:26,719 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-10 23:17:26,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:26,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:26,721 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) [2024-11-10 23:17:26,723 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 [2024-11-10 23:17:26,724 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-10 23:17:26,724 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-10 23:17:26,724 INFO L474 LassoAnalysis]: Proved termination. [2024-11-10 23:17:26,724 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-10 23:17:26,740 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 [2024-11-10 23:17:26,740 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-10 23:17:26,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:26,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 23:17:26,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:26,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 23:17:26,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 23:17:27,055 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 [2024-11-10 23:17:27,055 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) [2024-11-10 23:17:27,284 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. [2024-11-10 23:17:27,287 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 [2024-11-10 23:17:27,287 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) [2024-11-10 23:17:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 40 transitions. [2024-11-10 23:17:27,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 22 letters. [2024-11-10 23:17:27,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:27,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 34 letters. Loop has 22 letters. [2024-11-10 23:17:27,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:27,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 40 transitions. Stem has 12 letters. Loop has 44 letters. [2024-11-10 23:17:27,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:27,290 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 152 states and 210 transitions. [2024-11-10 23:17:27,299 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-10 23:17:27,303 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 152 states to 125 states and 179 transitions. [2024-11-10 23:17:27,303 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 72 [2024-11-10 23:17:27,304 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2024-11-10 23:17:27,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 179 transitions. [2024-11-10 23:17:27,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:27,305 INFO L218 hiAutomatonCegarLoop]: Abstraction has 125 states and 179 transitions. [2024-11-10 23:17:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states and 179 transitions. [2024-11-10 23:17:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2024-11-10 23:17:27,316 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) [2024-11-10 23:17:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2024-11-10 23:17:27,318 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 142 transitions. [2024-11-10 23:17:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 23:17:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 23:17:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-10 23:17:27,319 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) [2024-11-10 23:17:27,416 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 [2024-11-10 23:17:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 23:17:27,472 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2024-11-10 23:17:27,472 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2024-11-10 23:17:27,476 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-10 23:17:27,479 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 130 states and 178 transitions. [2024-11-10 23:17:27,479 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2024-11-10 23:17:27,479 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 81 [2024-11-10 23:17:27,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 178 transitions. [2024-11-10 23:17:27,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:27,479 INFO L218 hiAutomatonCegarLoop]: Abstraction has 130 states and 178 transitions. [2024-11-10 23:17:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states and 178 transitions. [2024-11-10 23:17:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2024-11-10 23:17:27,490 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) [2024-11-10 23:17:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2024-11-10 23:17:27,492 INFO L240 hiAutomatonCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-10 23:17:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 23:17:27,494 INFO L425 stractBuchiCegarLoop]: Abstraction has 118 states and 157 transitions. [2024-11-10 23:17:27,494 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-10 23:17:27,494 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 157 transitions. [2024-11-10 23:17:27,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-10 23:17:27,496 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:27,496 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:27,497 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 23:17:27,497 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1] [2024-11-10 23:17:27,498 INFO L745 eck$LassoCheckResult]: Stem: 881#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 882#ULTIMATE.init_returnLabel#1 assume true;assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 884#L27-1 call main_#t~ret6#1 := fibo(main_~x~0#1);< 916#fiboENTRY ~n := #in~n; 950#L8 assume !(~n < 1); 949#L10 assume !(1 == ~n); 894#L13-3 call #t~ret4 := fibo(~n - 1);< 893#fiboENTRY ~n := #in~n; 895#L8 assume !(~n < 1); 908#L10 assume !(1 == ~n); 915#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 947#L8 assume !(~n < 1); 945#L10 assume !(1 == ~n); 940#L13-3 call #t~ret4 := fibo(~n - 1);< 943#fiboENTRY ~n := #in~n; 948#L8 assume !(~n < 1); 946#L10 assume 1 == ~n;#res := 1; 944#fiboFINAL assume true; 942#fiboEXIT >#27#return; 887#L13-2 call #t~ret5 := fibo(~n - 2);< 941#fiboENTRY ~n := #in~n; 996#L8 assume ~n < 1;#res := 0; 995#fiboFINAL assume true; 994#fiboEXIT >#25#return; 992#L13-1 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 989#fiboFINAL assume true; 979#fiboEXIT >#27#return; 912#L13-2 [2024-11-10 23:17:27,498 INFO L747 eck$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 [2024-11-10 23:17:27,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 1 times [2024-11-10 23:17:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004347509] [2024-11-10 23:17:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:27,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:27,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:27,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1547808212, now seen corresponding path program 1 times [2024-11-10 23:17:27,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:27,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913405558] [2024-11-10 23:17:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:27,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-10 23:17:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:27,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-10 23:17:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:27,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-10 23:17:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 23:17:27,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 23:17:27,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913405558] [2024-11-10 23:17:27,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913405558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 23:17:27,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036133217] [2024-11-10 23:17:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:27,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 23:17:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:27,686 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) [2024-11-10 23:17:27,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 23:17:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:27,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 23:17:27,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 23:17:27,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 23:17:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 23:17:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036133217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 23:17:27,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 23:17:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-10 23:17:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336370209] [2024-11-10 23:17:27,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 23:17:27,901 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-10 23:17:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 23:17:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 23:17:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 23:17:27,902 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) [2024-11-10 23:17:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 23:17:27,992 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-10 23:17:27,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 76 transitions. [2024-11-10 23:17:27,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:27,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 54 states and 70 transitions. [2024-11-10 23:17:27,995 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2024-11-10 23:17:27,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-10 23:17:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2024-11-10 23:17:27,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:27,996 INFO L218 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-10 23:17:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2024-11-10 23:17:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-10 23:17:27,999 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) [2024-11-10 23:17:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-10 23:17:28,000 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-10 23:17:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 23:17:28,002 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-10 23:17:28,002 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-10 23:17:28,002 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2024-11-10 23:17:28,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2024-11-10 23:17:28,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-10 23:17:28,003 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-10 23:17:28,004 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 23:17:28,004 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-10 23:17:28,004 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 [2024-11-10 23:17:28,004 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 [2024-11-10 23:17:28,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 572026595, now seen corresponding path program 2 times [2024-11-10 23:17:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091739890] [2024-11-10 23:17:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:28,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:28,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:28,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 865543216, now seen corresponding path program 2 times [2024-11-10 23:17:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:28,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833361042] [2024-11-10 23:17:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:28,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 23:17:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 23:17:28,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 23:17:28,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 55729554, now seen corresponding path program 3 times [2024-11-10 23:17:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 23:17:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225915510] [2024-11-10 23:17:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 23:17:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 23:17:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-10 23:17:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-10 23:17:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-10 23:17:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-10 23:17:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-10 23:17:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-10 23:17:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 34 proven. 64 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-10 23:17:28,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 23:17:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225915510] [2024-11-10 23:17:28,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225915510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 23:17:28,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407346951] [2024-11-10 23:17:28,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 23:17:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 23:17:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:28,206 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) [2024-11-10 23:17:28,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 23:17:28,260 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-10 23:17:28,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 23:17:28,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 23:17:28,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-10 23:17:28,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 23:17:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 70 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-10 23:17:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407346951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 23:17:28,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 23:17:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 22 [2024-11-10 23:17:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551832567] [2024-11-10 23:17:28,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 23:17:28,935 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:28,935 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:28,935 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:28,935 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:28,935 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-10 23:17:28,936 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:28,936 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:28,936 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:28,936 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2024-11-10 23:17:28,936 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:28,936 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:28,937 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:28,941 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:28,944 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:28,953 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:29,005 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:29,005 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-10 23:17:29,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,008 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) [2024-11-10 23:17:29,009 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 [2024-11-10 23:17:29,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:29,010 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:29,027 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:29,027 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:29,037 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 [2024-11-10 23:17:29,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,039 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) [2024-11-10 23:17:29,039 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 [2024-11-10 23:17:29,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:29,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:29,052 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-10 23:17:29,052 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-10 23:17:29,062 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 [2024-11-10 23:17:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,064 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) [2024-11-10 23:17:29,064 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 [2024-11-10 23:17:29,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-10 23:17:29,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:29,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2024-11-10 23:17:29,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,094 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) [2024-11-10 23:17:29,095 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 [2024-11-10 23:17:29,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-10 23:17:29,096 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-10 23:17:29,564 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-10 23:17:29,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2024-11-10 23:17:29,569 INFO L204 LassoAnalysis]: Preferences: [2024-11-10 23:17:29,569 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-10 23:17:29,569 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-10 23:17:29,569 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-10 23:17:29,569 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-10 23:17:29,570 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,570 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-10 23:17:29,570 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-10 23:17:29,570 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2024-11-10 23:17:29,570 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-10 23:17:29,570 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-10 23:17:29,570 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:29,573 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:29,577 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:29,578 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-10 23:17:29,641 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-10 23:17:29,641 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-10 23:17:29,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,661 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) [2024-11-10 23:17:29,662 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 [2024-11-10 23:17:29,663 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 [2024-11-10 23:17:29,675 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:29,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:29,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:29,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:29,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:29,676 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:29,676 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:29,679 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,694 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) [2024-11-10 23:17:29,695 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 [2024-11-10 23:17:29,695 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 [2024-11-10 23:17:29,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:29,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:29,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:29,705 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:29,705 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:29,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:29,706 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:29,708 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:29,718 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 [2024-11-10 23:17:29,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,720 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) [2024-11-10 23:17:29,720 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 [2024-11-10 23:17:29,721 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 [2024-11-10 23:17:29,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:29,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:29,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:29,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:29,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:29,732 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:29,732 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:29,737 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-10 23:17:29,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:29,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,751 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) [2024-11-10 23:17:29,752 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 [2024-11-10 23:17:29,752 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 [2024-11-10 23:17:29,762 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-10 23:17:29,762 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-10 23:17:29,762 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-10 23:17:29,762 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-10 23:17:29,763 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-10 23:17:29,764 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-10 23:17:29,764 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-10 23:17:29,766 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-10 23:17:29,769 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-10 23:17:29,769 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-10 23:17:29,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-10 23:17:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 23:17:29,772 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) [2024-11-10 23:17:29,773 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 [2024-11-10 23:17:29,773 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-10 23:17:29,773 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-10 23:17:29,774 INFO L474 LassoAnalysis]: Proved termination. [2024-11-10 23:17:29,774 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2024-11-10 23:17:29,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:29,788 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-10 23:17:29,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:29,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 23:17:29,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:30,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 23:17:30,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 23:17:30,208 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 [2024-11-10 23:17:30,208 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) [2024-11-10 23:17:30,299 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. [2024-11-10 23:17:30,299 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 [2024-11-10 23:17:30,300 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) [2024-11-10 23:17:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-10 23:17:30,300 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-10 23:17:30,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:30,301 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-10 23:17:30,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:30,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 23:17:30,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:30,372 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 [2024-11-10 23:17:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:30,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 23:17:30,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 23:17:30,669 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 [2024-11-10 23:17:30,669 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) [2024-11-10 23:17:30,757 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. [2024-11-10 23:17:30,758 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 [2024-11-10 23:17:30,758 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) [2024-11-10 23:17:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2024-11-10 23:17:30,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-10 23:17:30,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:30,759 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-10 23:17:30,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 23:17:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:30,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 23:17:30,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 23:17:31,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 23:17:31,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 23:17:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 23:17:31,148 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 [2024-11-10 23:17:31,148 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) [2024-11-10 23:17:31,403 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. [2024-11-10 23:17:31,405 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 [2024-11-10 23:17:31,406 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) [2024-11-10 23:17:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 45 transitions. [2024-11-10 23:17:31,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 22 letters. [2024-11-10 23:17:31,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:31,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 54 letters. Loop has 22 letters. [2024-11-10 23:17:31,409 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:31,409 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 45 transitions. Stem has 32 letters. Loop has 44 letters. [2024-11-10 23:17:31,411 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-10 23:17:31,411 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 526 transitions. [2024-11-10 23:17:31,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2024-11-10 23:17:31,427 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 259 states and 359 transitions. [2024-11-10 23:17:31,428 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2024-11-10 23:17:31,428 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2024-11-10 23:17:31,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 359 transitions. [2024-11-10 23:17:31,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-10 23:17:31,430 INFO L218 hiAutomatonCegarLoop]: Abstraction has 259 states and 359 transitions. [2024-11-10 23:17:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states and 359 transitions. [2024-11-10 23:17:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 187. [2024-11-10 23:17:31,454 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) [2024-11-10 23:17:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 246 transitions. [2024-11-10 23:17:31,456 INFO L240 hiAutomatonCegarLoop]: Abstraction has 187 states and 246 transitions. [2024-11-10 23:17:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 23:17:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 23:17:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-10 23:17:31,458 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) [2024-11-10 23:17:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 23:17:31,770 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2024-11-10 23:17:31,770 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 136 states and 141 transitions. [2024-11-10 23:17:31,772 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-10 23:17:31,772 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 136 states to 0 states and 0 transitions. [2024-11-10 23:17:31,772 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-10 23:17:31,772 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-10 23:17:31,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-10 23:17:31,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-10 23:17:31,772 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-10 23:17:31,772 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-10 23:17:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 23:17:31,773 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-10 23:17:31,773 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-10 23:17:31,773 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-10 23:17:31,773 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-10 23:17:31,773 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-10 23:17:31,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 10.11 11:17:31 BoogieIcfgContainer [2024-11-10 23:17:31,783 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-10 23:17:31,784 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-10 23:17:31,784 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-10 23:17:31,784 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-10 23:17:31,787 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 11:17:23" (3/4) ... [2024-11-10 23:17:31,790 INFO L146 WitnessPrinter]: No result that supports witness generation found [2024-11-10 23:17:31,791 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-10 23:17:31,791 INFO L158 Benchmark]: Toolchain (without parser) took 8851.69ms. Allocated memory was 117.4MB in the beginning and 201.3MB in the end (delta: 83.9MB). Free memory was 64.8MB in the beginning and 148.9MB in the end (delta: -84.1MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. [2024-11-10 23:17:31,792 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 117.4MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-10 23:17:31,792 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.17ms. Allocated memory is still 117.4MB. Free memory was 64.5MB in the beginning and 52.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-10 23:17:31,792 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.74ms. Allocated memory was 117.4MB in the beginning and 167.8MB in the end (delta: 50.3MB). Free memory was 52.4MB in the beginning and 141.7MB in the end (delta: -89.3MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2024-11-10 23:17:31,792 INFO L158 Benchmark]: Boogie Preprocessor took 26.24ms. Allocated memory is still 167.8MB. Free memory was 141.6MB in the beginning and 140.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-10 23:17:31,793 INFO L158 Benchmark]: IcfgBuilder took 232.96ms. Allocated memory is still 167.8MB. Free memory was 140.1MB in the beginning and 135.6MB in the end (delta: 4.6MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2024-11-10 23:17:31,793 INFO L158 Benchmark]: BuchiAutomizer took 8298.47ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 134.5MB in the beginning and 149.9MB in the end (delta: -15.4MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2024-11-10 23:17:31,793 INFO L158 Benchmark]: Witness Printer took 6.68ms. Allocated memory is still 201.3MB. Free memory was 149.9MB in the beginning and 148.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-10 23:17:31,795 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 117.4MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.17ms. Allocated memory is still 117.4MB. Free memory was 64.5MB in the beginning and 52.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.74ms. Allocated memory was 117.4MB in the beginning and 167.8MB in the end (delta: 50.3MB). Free memory was 52.4MB in the beginning and 141.7MB in the end (delta: -89.3MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.24ms. Allocated memory is still 167.8MB. Free memory was 141.6MB in the beginning and 140.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 232.96ms. Allocated memory is still 167.8MB. Free memory was 140.1MB in the beginning and 135.6MB in the end (delta: 4.6MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 8298.47ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 134.5MB in the beginning and 149.9MB in the end (delta: -15.4MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Witness Printer took 6.68ms. Allocated memory is still 201.3MB. Free memory was 149.9MB in the beginning and 148.9MB in the end (delta: 1.0MB). 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 8.2s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 4.9s. Construction of modules took 0.5s. Büchi inclusion checks took 2.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.1s 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, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 228 mSDsluCounter, 375 SdHoareTripleChecker+Invalid, 0.6s 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: 20ms 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! [2024-11-10 23:17:31,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:32,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:32,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 23:17:32,416 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