./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya --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 eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:55:46,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:55:46,217 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-28 23:55:46,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:55:46,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:55:46,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:55:46,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:55:46,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:55:46,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:55:46,250 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:55:46,250 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:55:46,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:55:46,251 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:55:46,252 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-28 23:55:46,253 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-28 23:55:46,253 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-28 23:55:46,254 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-28 23:55:46,254 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-28 23:55:46,255 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-28 23:55:46,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:55:46,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-28 23:55:46,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:55:46,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:55:46,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:55:46,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:55:46,258 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-28 23:55:46,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-28 23:55:46,259 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-28 23:55:46,259 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:55:46,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:55:46,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:55:46,261 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-28 23:55:46,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:55:46,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:55:46,261 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:55:46,262 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:55:46,262 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:55:46,262 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-28 23:55:46,262 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 [2023-11-28 23:55:46,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:55:46,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:55:46,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:55:46,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:55:46,490 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:55:46,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2023-11-28 23:55:49,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:55:49,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:55:49,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2023-11-28 23:55:49,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/data/9cfa0c4ac/7d327c35f2544d7caca00c3ccdd01ac1/FLAGd581b08ac [2023-11-28 23:55:49,483 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/data/9cfa0c4ac/7d327c35f2544d7caca00c3ccdd01ac1 [2023-11-28 23:55:49,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:55:49,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:55:49,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:49,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:55:49,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:55:49,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729ee893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49, skipping insertion in model container [2023-11-28 23:55:49,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,516 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:55:49,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:49,689 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:55:49,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:49,721 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:55:49,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49 WrapperNode [2023-11-28 23:55:49,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:49,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:49,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:55:49,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:55:49,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,757 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-28 23:55:49,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:49,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:55:49,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:55:49,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:55:49,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,772 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,786 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]. [2023-11-28 23:55:49,786 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:55:49,797 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:55:49,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:55:49,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:55:49,798 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (1/1) ... [2023-11-28 23:55:49,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:49,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:49,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-28 23:55:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:55:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:55:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-28 23:55:49,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-28 23:55:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-28 23:55:49,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-28 23:55:49,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:55:49,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:55:49,947 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:55:49,950 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:55:50,062 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:55:50,072 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:55:50,073 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-28 23:55:50,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:50 BoogieIcfgContainer [2023-11-28 23:55:50,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:55:50,076 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-28 23:55:50,076 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-28 23:55:50,081 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-28 23:55:50,081 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-28 23:55:50,082 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 11:55:49" (1/3) ... [2023-11-28 23:55:50,083 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@700b8fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:55:50, skipping insertion in model container [2023-11-28 23:55:50,083 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-28 23:55:50,083 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:49" (2/3) ... [2023-11-28 23:55:50,084 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@700b8fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:55:50, skipping insertion in model container [2023-11-28 23:55:50,084 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-28 23:55:50,084 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:50" (3/3) ... [2023-11-28 23:55:50,086 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_5-2.c [2023-11-28 23:55:50,147 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-28 23:55:50,147 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-28 23:55:50,147 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-28 23:55:50,147 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-28 23:55:50,147 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-28 23:55:50,148 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-28 23:55:50,148 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-28 23:55:50,148 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-28 23:55:50,152 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-28 23:55:50,171 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:50,172 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:50,172 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:50,177 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-28 23:55:50,177 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:50,177 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-28 23:55:50,177 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-28 23:55:50,180 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:50,180 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:50,181 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:50,181 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-28 23:55:50,181 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:50,187 INFO L748 eck$LassoCheckResult]: Stem: 25#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 13#L39true call main_#t~ret8#1 := fibo1(main_~x~0#1);< 18#$Ultimate##0true [2023-11-28 23:55:50,188 INFO L750 eck$LassoCheckResult]: Loop: 18#$Ultimate##0true ~n := #in~n; 7#L10true assume !(~n < 1); 6#L12true assume !(1 == ~n); 8#L15true call #t~ret4 := fibo2(~n - 1);< 15#$Ultimate##0true ~n := #in~n; 10#L20true assume !(~n < 1); 14#L22true assume !(1 == ~n); 21#L25true call #t~ret6 := fibo1(~n - 1);< 18#$Ultimate##0true [2023-11-28 23:55:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2023-11-28 23:55:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:50,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918555473] [2023-11-28 23:55:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,295 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:50,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2023-11-28 23:55:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:50,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897002234] [2023-11-28 23:55:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,335 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:50,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2023-11-28 23:55:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238949114] [2023-11-28 23:55:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:50,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:50,586 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:50,587 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:50,587 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:50,587 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:50,587 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-28 23:55:50,587 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:50,588 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:50,588 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration1_Loop [2023-11-28 23:55:50,588 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:50,588 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:50,600 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,608 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,611 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,614 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,617 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,620 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,623 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,626 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:50,721 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:50,722 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-28 23:55:50,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-28 23:55:50,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,736 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,752 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,752 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:50,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-28 23:55:50,776 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,776 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,791 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,791 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2023-11-28 23:55:50,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-28 23:55:50,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,807 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,823 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,823 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-11-28 23:55:50,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-28 23:55:50,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,878 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,879 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2023-11-28 23:55:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-28 23:55:50,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,891 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,905 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,905 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2023-11-28 23:55:50,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-28 23:55:50,913 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,913 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,928 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,928 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2023-11-28 23:55:50,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-28 23:55:50,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,938 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,956 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:50,956 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:50,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2023-11-28 23:55:50,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-28 23:55:50,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:50,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:50,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-11-28 23:55:50,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:50,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,986 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-28 23:55:50,989 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-28 23:55:50,989 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:51,053 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-28 23:55:51,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2023-11-28 23:55:51,056 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:51,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:51,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:51,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:51,057 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-28 23:55:51,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:51,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:51,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration1_Loop [2023-11-28 23:55:51,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:51,057 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:51,059 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,062 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,066 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,069 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,072 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,075 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,085 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,088 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:51,144 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:51,149 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-28 23:55:51,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,152 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-28 23:55:51,155 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 [2023-11-28 23:55:51,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,167 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,169 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,169 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,171 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:51,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2023-11-28 23:55:51,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-28 23:55:51,177 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 [2023-11-28 23:55:51,187 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,187 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,188 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,188 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,188 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,188 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,189 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,190 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:51,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2023-11-28 23:55:51,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-28 23:55:51,196 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 [2023-11-28 23:55:51,206 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,206 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,207 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,207 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,207 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,207 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,207 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,209 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:51,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2023-11-28 23:55:51,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-28 23:55:51,215 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 [2023-11-28 23:55:51,224 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,224 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,225 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,225 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,225 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,225 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,225 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,227 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:51,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2023-11-28 23:55:51,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-28 23:55:51,233 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 [2023-11-28 23:55:51,243 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,243 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,244 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,244 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,244 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,244 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,244 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,246 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:51,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2023-11-28 23:55:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-28 23:55:51,252 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 [2023-11-28 23:55:51,262 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:51,262 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:51,262 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:51,262 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:51,262 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:51,264 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:51,264 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:51,268 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-28 23:55:51,272 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-28 23:55:51,272 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-28 23:55:51,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:51,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:51,318 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:51,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-28 23:55:51,322 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-28 23:55:51,322 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-28 23:55:51,322 INFO L513 LassoAnalysis]: Proved termination. [2023-11-28 23:55:51,322 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2023-11-28 23:55:51,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2023-11-28 23:55:51,332 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-28 23:55:51,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:55:51,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:55:51,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:51,510 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2023-11-28 23:55:51,512 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:51,682 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 85 states and 117 transitions. Complement of second has 24 states. [2023-11-28 23:55:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-28 23:55:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2023-11-28 23:55:51,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-28 23:55:51,692 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:51,692 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-28 23:55:51,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:51,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2023-11-28 23:55:51,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:51,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2023-11-28 23:55:51,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:51,708 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2023-11-28 23:55:51,709 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-11-28 23:55:51,710 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-11-28 23:55:51,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2023-11-28 23:55:51,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:51,711 INFO L218 hiAutomatonCegarLoop]: Abstraction has 61 states and 82 transitions. [2023-11-28 23:55:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2023-11-28 23:55:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2023-11-28 23:55:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-28 23:55:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-11-28 23:55:51,738 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-28 23:55:51,738 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-28 23:55:51,738 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-28 23:55:51,738 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2023-11-28 23:55:51,739 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:51,739 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:51,739 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:51,741 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:51,741 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:51,741 INFO L748 eck$LassoCheckResult]: Stem: 236#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 223#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 218#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 217#$Ultimate##0 ~n := #in~n; 219#L10 assume !(~n < 1); 229#L12 assume !(1 == ~n); 213#L15 call #t~ret4 := fibo2(~n - 1);< 233#$Ultimate##0 ~n := #in~n; 247#L20 assume !(~n < 1); 248#L22 assume !(1 == ~n); 203#L25 call #t~ret6 := fibo1(~n - 1);< 220#$Ultimate##0 ~n := #in~n; 222#L10 assume ~n < 1;#res := 0; 209#fibo1FINAL assume true; 210#fibo1EXIT >#48#return; 211#L25-1 [2023-11-28 23:55:51,741 INFO L750 eck$LassoCheckResult]: Loop: 211#L25-1 call #t~ret7 := fibo1(~n - 2);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume !(~n < 1); 243#L12 assume !(1 == ~n); 212#L15 call #t~ret4 := fibo2(~n - 1);< 225#$Ultimate##0 ~n := #in~n; 245#L20 assume !(~n < 1); 246#L22 assume !(1 == ~n); 224#L25 call #t~ret6 := fibo1(~n - 1);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume ~n < 1;#res := 0; 238#fibo1FINAL assume true; 239#fibo1EXIT >#48#return; 211#L25-1 [2023-11-28 23:55:51,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2023-11-28 23:55:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261183977] [2023-11-28 23:55:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 23:55:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261183977] [2023-11-28 23:55:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261183977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:51,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:51,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:55:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554321747] [2023-11-28 23:55:51,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:51,868 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:55:51,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2023-11-28 23:55:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926954961] [2023-11-28 23:55:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2023-11-28 23:55:51,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926954961] [2023-11-28 23:55:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926954961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:55:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744165164] [2023-11-28 23:55:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:51,947 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-28 23:55:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:55:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:55:51,951 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:55:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:52,019 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-28 23:55:52,019 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2023-11-28 23:55:52,022 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:52,025 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2023-11-28 23:55:52,025 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2023-11-28 23:55:52,025 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-28 23:55:52,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2023-11-28 23:55:52,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:52,026 INFO L218 hiAutomatonCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-28 23:55:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2023-11-28 23:55:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-11-28 23:55:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-28 23:55:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-28 23:55:52,033 INFO L240 hiAutomatonCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-28 23:55:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:55:52,035 INFO L428 stractBuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-28 23:55:52,035 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-28 23:55:52,035 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2023-11-28 23:55:52,037 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-28 23:55:52,037 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:52,037 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:52,038 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:52,038 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:52,038 INFO L748 eck$LassoCheckResult]: Stem: 381#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 365#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 366#$Ultimate##0 ~n := #in~n; 367#L10 assume !(~n < 1); 395#L12 assume !(1 == ~n); 359#L15 call #t~ret4 := fibo2(~n - 1);< 379#$Ultimate##0 ~n := #in~n; 396#L20 assume !(~n < 1); 397#L22 assume !(1 == ~n); 348#L25 call #t~ret6 := fibo1(~n - 1);< 368#$Ultimate##0 ~n := #in~n; 370#L10 assume !(~n < 1); 373#L12 assume 1 == ~n;#res := 1; 374#fibo1FINAL assume true; 386#fibo1EXIT >#48#return; 355#L25-1 [2023-11-28 23:55:52,038 INFO L750 eck$LassoCheckResult]: Loop: 355#L25-1 call #t~ret7 := fibo1(~n - 2);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume !(1 == ~n); 361#L15 call #t~ret4 := fibo2(~n - 1);< 392#$Ultimate##0 ~n := #in~n; 391#L20 assume !(~n < 1); 389#L22 assume !(1 == ~n); 356#L25 call #t~ret6 := fibo1(~n - 1);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume 1 == ~n;#res := 1; 384#fibo1FINAL assume true; 385#fibo1EXIT >#48#return; 355#L25-1 [2023-11-28 23:55:52,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2023-11-28 23:55:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588875867] [2023-11-28 23:55:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 23:55:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:52,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:52,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588875867] [2023-11-28 23:55:52,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588875867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:52,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580023359] [2023-11-28 23:55:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:52,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:55:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:52,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:55:52,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:52,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580023359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:52,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:52,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-28 23:55:52,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299693143] [2023-11-28 23:55:52,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:52,378 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:55:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2023-11-28 23:55:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744382192] [2023-11-28 23:55:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:52,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:52,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:52,584 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:52,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:52,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:52,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:52,585 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-28 23:55:52,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:52,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:52,585 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration3_Loop [2023-11-28 23:55:52,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:52,585 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:52,586 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,589 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,591 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,593 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,596 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,599 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,605 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,607 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,609 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,665 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:52,665 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-28 23:55:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-28 23:55:52,675 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,675 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,687 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:52,687 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=2} Honda state: {fibo2_#in~n=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:52,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2023-11-28 23:55:52,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,695 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-28 23:55:52,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,698 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,710 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:52,710 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:52,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2023-11-28 23:55:52,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,714 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-28 23:55:52,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,716 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,728 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:52,728 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:52,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2023-11-28 23:55:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-28 23:55:52,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,739 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,751 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:52,751 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:52,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2023-11-28 23:55:52,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,755 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-28 23:55:52,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,772 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:52,773 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:52,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2023-11-28 23:55:52,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,777 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-28 23:55:52,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:52,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2023-11-28 23:55:52,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,799 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-28 23:55:52,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-28 23:55:52,802 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:52,818 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-28 23:55:52,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:52,822 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:52,822 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:52,822 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:52,822 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:52,822 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-28 23:55:52,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,822 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:52,822 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:52,822 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration3_Loop [2023-11-28 23:55:52,822 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:52,822 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:52,823 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,826 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,828 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,830 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,832 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,838 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,842 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,844 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,847 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:52,892 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:52,893 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-28 23:55:52,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,895 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-28 23:55:52,925 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 [2023-11-28 23:55:52,938 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:52,938 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:52,938 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:52,938 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:52,938 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:52,939 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:52,939 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:52,941 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:52,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:52,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,946 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-28 23:55:52,948 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 [2023-11-28 23:55:52,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:52,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:52,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:52,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:52,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:52,961 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:52,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:52,963 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:52,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2023-11-28 23:55:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,968 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-28 23:55:52,970 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 [2023-11-28 23:55:52,982 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:52,983 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:52,983 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:52,983 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:52,983 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:52,983 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:52,983 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:52,985 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:52,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2023-11-28 23:55:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,988 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-28 23:55:52,991 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 [2023-11-28 23:55:53,004 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:53,004 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:53,004 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:53,004 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:53,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:53,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:53,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:53,006 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:53,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2023-11-28 23:55:53,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:53,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:53,010 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:53,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-28 23:55:53,013 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 [2023-11-28 23:55:53,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:53,026 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:53,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:53,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:53,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:53,027 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:53,027 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:53,030 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-28 23:55:53,033 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-28 23:55:53,033 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-28 23:55:53,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:53,034 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-28 23:55:53,036 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-28 23:55:53,036 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-28 23:55:53,036 INFO L513 LassoAnalysis]: Proved termination. [2023-11-28 23:55:53,036 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2023-11-28 23:55:53,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2023-11-28 23:55:53,039 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-28 23:55:53,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:53,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:55:53,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:53,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 23:55:53,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:53,300 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-28 23:55:53,300 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:55:53,688 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 191 states and 263 transitions. Complement of second has 40 states. [2023-11-28 23:55:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-28 23:55:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:55:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2023-11-28 23:55:53,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2023-11-28 23:55:53,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:53,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2023-11-28 23:55:53,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:53,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2023-11-28 23:55:53,692 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:53,693 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2023-11-28 23:55:53,698 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-28 23:55:53,703 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2023-11-28 23:55:53,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2023-11-28 23:55:53,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2023-11-28 23:55:53,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2023-11-28 23:55:53,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:53,706 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 237 transitions. [2023-11-28 23:55:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2023-11-28 23:55:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2023-11-28 23:55:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (48), 30 states have call predecessors, (48), 33 states have call successors, (48) [2023-11-28 23:55:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2023-11-28 23:55:53,723 INFO L240 hiAutomatonCegarLoop]: Abstraction has 152 states and 206 transitions. [2023-11-28 23:55:53,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:53,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 23:55:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:55:53,724 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:55:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:53,907 INFO L93 Difference]: Finished difference Result 191 states and 254 transitions. [2023-11-28 23:55:53,907 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 254 transitions. [2023-11-28 23:55:53,912 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-28 23:55:53,917 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 185 states and 246 transitions. [2023-11-28 23:55:53,917 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2023-11-28 23:55:53,918 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2023-11-28 23:55:53,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 185 states and 246 transitions. [2023-11-28 23:55:53,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:53,918 INFO L218 hiAutomatonCegarLoop]: Abstraction has 185 states and 246 transitions. [2023-11-28 23:55:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states and 246 transitions. [2023-11-28 23:55:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2023-11-28 23:55:53,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2023-11-28 23:55:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 116 states have internal predecessors, (133), 40 states have call successors, (42), 21 states have call predecessors, (42), 26 states have return successors, (56), 34 states have call predecessors, (56), 37 states have call successors, (56) [2023-11-28 23:55:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 231 transitions. [2023-11-28 23:55:53,943 INFO L240 hiAutomatonCegarLoop]: Abstraction has 172 states and 231 transitions. [2023-11-28 23:55:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 23:55:53,944 INFO L428 stractBuchiCegarLoop]: Abstraction has 172 states and 231 transitions. [2023-11-28 23:55:53,944 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-28 23:55:53,944 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 172 states and 231 transitions. [2023-11-28 23:55:53,947 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-28 23:55:53,947 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:53,947 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:53,951 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 23:55:53,951 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:53,952 INFO L748 eck$LassoCheckResult]: Stem: 1278#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 1252#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 1253#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 1281#$Ultimate##0 ~n := #in~n; 1275#L10 assume !(~n < 1); 1270#L12 assume !(1 == ~n); 1221#L15 call #t~ret4 := fibo2(~n - 1);< 1229#$Ultimate##0 ~n := #in~n; 1230#L20 assume !(~n < 1); 1220#L22 assume !(1 == ~n); 1222#L25 call #t~ret6 := fibo1(~n - 1);< 1254#$Ultimate##0 ~n := #in~n; 1311#L10 assume !(~n < 1); 1308#L12 assume !(1 == ~n); 1304#L15 call #t~ret4 := fibo2(~n - 1);< 1305#$Ultimate##0 ~n := #in~n; 1309#L20 assume !(~n < 1); 1310#L22 assume !(1 == ~n); 1257#L25 call #t~ret6 := fibo1(~n - 1);< 1254#$Ultimate##0 ~n := #in~n; 1311#L10 assume !(~n < 1); 1308#L12 assume !(1 == ~n); 1304#L15 call #t~ret4 := fibo2(~n - 1);< 1305#$Ultimate##0 ~n := #in~n; 1309#L20 assume ~n < 1;#res := 0; 1307#fibo2FINAL assume true; 1303#fibo2EXIT >#52#return; 1256#L15-1 call #t~ret5 := fibo2(~n - 2);< 1258#$Ultimate##0 ~n := #in~n; 1378#L20 assume !(~n < 1); 1377#L22 assume !(1 == ~n); 1257#L25 call #t~ret6 := fibo1(~n - 1);< 1254#$Ultimate##0 ~n := #in~n; 1313#L10 assume !(~n < 1); 1318#L12 assume 1 == ~n;#res := 1; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1301#L25-1 call #t~ret7 := fibo1(~n - 2);< 1243#$Ultimate##0 ~n := #in~n; 1306#L10 assume !(~n < 1); 1302#L12 assume !(1 == ~n); 1241#L15 call #t~ret4 := fibo2(~n - 1);< 1299#$Ultimate##0 ~n := #in~n; 1298#L20 assume ~n < 1;#res := 0; 1272#fibo2FINAL assume true; 1273#fibo2EXIT >#52#return; 1242#L15-1 call #t~ret5 := fibo2(~n - 2);< 1299#$Ultimate##0 ~n := #in~n; 1298#L20 assume !(~n < 1); 1292#L22 assume 1 == ~n;#res := 1; 1293#fibo2FINAL assume true; 1364#fibo2EXIT >#54#return; 1365#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1383#fibo1FINAL assume true; 1382#fibo1EXIT >#50#return; 1248#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 1371#fibo2FINAL assume true; 1368#fibo2EXIT >#54#return; 1365#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1383#fibo1FINAL assume true; 1382#fibo1EXIT >#48#return; 1247#L25-1 call #t~ret7 := fibo1(~n - 2);< 1239#$Ultimate##0 ~n := #in~n; 1249#L10 assume !(~n < 1); 1267#L12 assume !(1 == ~n); 1269#L15 call #t~ret4 := fibo2(~n - 1);< 1276#$Ultimate##0 ~n := #in~n; 1373#L20 assume ~n < 1;#res := 0; 1370#fibo2FINAL assume true; 1367#fibo2EXIT >#52#return; 1366#L15-1 call #t~ret5 := fibo2(~n - 2);< 1276#$Ultimate##0 ~n := #in~n; 1373#L20 assume ~n < 1;#res := 0; 1370#fibo2FINAL assume true; 1367#fibo2EXIT >#54#return; 1365#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1383#fibo1FINAL assume true; 1382#fibo1EXIT >#50#return; 1248#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 1371#fibo2FINAL assume true; 1368#fibo2EXIT >#52#return; 1366#L15-1 [2023-11-28 23:55:53,952 INFO L750 eck$LassoCheckResult]: Loop: 1366#L15-1 call #t~ret5 := fibo2(~n - 2);< 1276#$Ultimate##0 ~n := #in~n; 1373#L20 assume !(~n < 1); 1374#L22 assume !(1 == ~n); 1246#L25 call #t~ret6 := fibo1(~n - 1);< 1239#$Ultimate##0 ~n := #in~n; 1249#L10 assume !(~n < 1); 1267#L12 assume !(1 == ~n); 1269#L15 call #t~ret4 := fibo2(~n - 1);< 1276#$Ultimate##0 ~n := #in~n; 1373#L20 assume ~n < 1;#res := 0; 1370#fibo2FINAL assume true; 1367#fibo2EXIT >#52#return; 1366#L15-1 [2023-11-28 23:55:53,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2023-11-28 23:55:53,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372330522] [2023-11-28 23:55:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-28 23:55:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-28 23:55:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 23 proven. 71 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-28 23:55:54,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372330522] [2023-11-28 23:55:54,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372330522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147763422] [2023-11-28 23:55:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:54,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:54,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:54,418 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:54,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 23:55:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:54,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:55:54,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 30 proven. 79 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-28 23:55:54,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-28 23:55:55,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147763422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:55,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:55,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 30 [2023-11-28 23:55:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896234358] [2023-11-28 23:55:55,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:55,175 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:55:55,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash -441960109, now seen corresponding path program 1 times [2023-11-28 23:55:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:55,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442171335] [2023-11-28 23:55:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:55,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442171335] [2023-11-28 23:55:55,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442171335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:55,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:55,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:55:55,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079570252] [2023-11-28 23:55:55,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:55,221 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-28 23:55:55,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:55:55,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:55:55,222 INFO L87 Difference]: Start difference. First operand 172 states and 231 transitions. cyclomatic complexity: 64 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:55:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:55,267 INFO L93 Difference]: Finished difference Result 189 states and 242 transitions. [2023-11-28 23:55:55,267 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 189 states and 242 transitions. [2023-11-28 23:55:55,271 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-28 23:55:55,274 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 189 states to 177 states and 228 transitions. [2023-11-28 23:55:55,275 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 115 [2023-11-28 23:55:55,275 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 115 [2023-11-28 23:55:55,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 228 transitions. [2023-11-28 23:55:55,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:55,276 INFO L218 hiAutomatonCegarLoop]: Abstraction has 177 states and 228 transitions. [2023-11-28 23:55:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states and 228 transitions. [2023-11-28 23:55:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2023-11-28 23:55:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 113 states have internal predecessors, (124), 35 states have call successors, (36), 20 states have call predecessors, (36), 26 states have return successors, (52), 29 states have call predecessors, (52), 32 states have call successors, (52) [2023-11-28 23:55:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 212 transitions. [2023-11-28 23:55:55,289 INFO L240 hiAutomatonCegarLoop]: Abstraction has 163 states and 212 transitions. [2023-11-28 23:55:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:55:55,290 INFO L428 stractBuchiCegarLoop]: Abstraction has 163 states and 212 transitions. [2023-11-28 23:55:55,290 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-28 23:55:55,291 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 212 transitions. [2023-11-28 23:55:55,292 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-28 23:55:55,292 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:55,292 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:55,295 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-28 23:55:55,295 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-28 23:55:55,296 INFO L748 eck$LassoCheckResult]: Stem: 2359#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 2325#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 2326#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 2361#$Ultimate##0 ~n := #in~n; 2355#L10 assume !(~n < 1); 2350#L12 assume !(1 == ~n); 2307#L15 call #t~ret4 := fibo2(~n - 1);< 2311#$Ultimate##0 ~n := #in~n; 2312#L20 assume !(~n < 1); 2306#L22 assume !(1 == ~n); 2308#L25 call #t~ret6 := fibo1(~n - 1);< 2330#$Ultimate##0 ~n := #in~n; 2333#L10 assume !(~n < 1); 2391#L12 assume !(1 == ~n); 2334#L15 call #t~ret4 := fibo2(~n - 1);< 2387#$Ultimate##0 ~n := #in~n; 2393#L20 assume !(~n < 1); 2392#L22 assume !(1 == ~n); 2331#L25 call #t~ret6 := fibo1(~n - 1);< 2330#$Ultimate##0 ~n := #in~n; 2333#L10 assume !(~n < 1); 2391#L12 assume !(1 == ~n); 2334#L15 call #t~ret4 := fibo2(~n - 1);< 2387#$Ultimate##0 ~n := #in~n; 2393#L20 assume !(~n < 1); 2392#L22 assume 1 == ~n;#res := 1; 2389#fibo2FINAL assume true; 2360#fibo2EXIT >#52#return; 2335#L15-1 call #t~ret5 := fibo2(~n - 2);< 2338#$Ultimate##0 ~n := #in~n; 2357#L20 assume !(~n < 1); 2358#L22 assume !(1 == ~n); 2331#L25 call #t~ret6 := fibo1(~n - 1);< 2330#$Ultimate##0 ~n := #in~n; 2332#L10 assume !(~n < 1); 2396#L12 assume 1 == ~n;#res := 1; 2395#fibo1FINAL assume true; 2394#fibo1EXIT >#48#return; 2348#L25-1 call #t~ret7 := fibo1(~n - 2);< 2322#$Ultimate##0 ~n := #in~n; 2388#L10 assume !(~n < 1); 2380#L12 assume !(1 == ~n); 2321#L15 call #t~ret4 := fibo2(~n - 1);< 2377#$Ultimate##0 ~n := #in~n; 2375#L20 assume !(~n < 1); 2371#L22 assume 1 == ~n;#res := 1; 2372#fibo2FINAL assume true; 2430#fibo2EXIT >#52#return; 2416#L15-1 call #t~ret5 := fibo2(~n - 2);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume ~n < 1;#res := 0; 2443#fibo2FINAL assume true; 2451#fibo2EXIT >#54#return; 2415#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2449#fibo1FINAL assume true; 2438#fibo1EXIT >#50#return; 2434#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 2428#fibo2FINAL assume true; 2419#fibo2EXIT >#54#return; 2415#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2449#fibo1FINAL assume true; 2438#fibo1EXIT >#48#return; 2423#L25-1 call #t~ret7 := fibo1(~n - 2);< 2439#$Ultimate##0 ~n := #in~n; 2447#L10 assume !(~n < 1); 2435#L12 assume !(1 == ~n); 2420#L15 call #t~ret4 := fibo2(~n - 1);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume !(~n < 1); 2441#L22 assume 1 == ~n;#res := 1; 2440#fibo2FINAL assume true; 2429#fibo2EXIT >#52#return; 2416#L15-1 call #t~ret5 := fibo2(~n - 2);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume ~n < 1;#res := 0; 2443#fibo2FINAL assume true; 2451#fibo2EXIT >#54#return; 2415#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2449#fibo1FINAL assume true; 2438#fibo1EXIT >#50#return; 2434#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 2428#fibo2FINAL assume true; 2419#fibo2EXIT >#52#return; 2416#L15-1 [2023-11-28 23:55:55,296 INFO L750 eck$LassoCheckResult]: Loop: 2416#L15-1 call #t~ret5 := fibo2(~n - 2);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume !(~n < 1); 2441#L22 assume !(1 == ~n); 2425#L25 call #t~ret6 := fibo1(~n - 1);< 2439#$Ultimate##0 ~n := #in~n; 2447#L10 assume !(~n < 1); 2435#L12 assume !(1 == ~n); 2420#L15 call #t~ret4 := fibo2(~n - 1);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume !(~n < 1); 2441#L22 assume !(1 == ~n); 2425#L25 call #t~ret6 := fibo1(~n - 1);< 2439#$Ultimate##0 ~n := #in~n; 2447#L10 assume !(~n < 1); 2435#L12 assume !(1 == ~n); 2420#L15 call #t~ret4 := fibo2(~n - 1);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume !(~n < 1); 2441#L22 assume 1 == ~n;#res := 1; 2440#fibo2FINAL assume true; 2429#fibo2EXIT >#52#return; 2416#L15-1 call #t~ret5 := fibo2(~n - 2);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume ~n < 1;#res := 0; 2443#fibo2FINAL assume true; 2451#fibo2EXIT >#54#return; 2415#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2449#fibo1FINAL assume true; 2438#fibo1EXIT >#48#return; 2423#L25-1 call #t~ret7 := fibo1(~n - 2);< 2439#$Ultimate##0 ~n := #in~n; 2447#L10 assume !(~n < 1); 2435#L12 assume !(1 == ~n); 2420#L15 call #t~ret4 := fibo2(~n - 1);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume !(~n < 1); 2441#L22 assume 1 == ~n;#res := 1; 2440#fibo2FINAL assume true; 2429#fibo2EXIT >#52#return; 2416#L15-1 call #t~ret5 := fibo2(~n - 2);< 2426#$Ultimate##0 ~n := #in~n; 2442#L20 assume ~n < 1;#res := 0; 2443#fibo2FINAL assume true; 2451#fibo2EXIT >#54#return; 2415#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2449#fibo1FINAL assume true; 2438#fibo1EXIT >#50#return; 2434#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 2428#fibo2FINAL assume true; 2419#fibo2EXIT >#52#return; 2416#L15-1 [2023-11-28 23:55:55,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1159629665, now seen corresponding path program 2 times [2023-11-28 23:55:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330862996] [2023-11-28 23:55:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-28 23:55:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-28 23:55:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-28 23:55:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330862996] [2023-11-28 23:55:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330862996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644970654] [2023-11-28 23:55:55,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:55:55,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:55,652 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:55,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 23:55:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:55:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:55:55,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:55:55,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-28 23:55:55,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 23 proven. 93 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-28 23:55:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644970654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:56,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 21 [2023-11-28 23:55:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021075872] [2023-11-28 23:55:56,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:56,290 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:55:56,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:56,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 1 times [2023-11-28 23:55:56,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655440335] [2023-11-28 23:55:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 23:55:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 23:55:56,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:56,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655440335] [2023-11-28 23:55:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655440335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:56,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985686723] [2023-11-28 23:55:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:56,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:56,478 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:56,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-28 23:55:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:56,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:55:56,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-28 23:55:56,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-28 23:55:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985686723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:56,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-28 23:55:56,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765704493] [2023-11-28 23:55:56,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:56,984 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-28 23:55:56,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:55:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:55:56,985 INFO L87 Difference]: Start difference. First operand 163 states and 212 transitions. cyclomatic complexity: 54 Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-28 23:55:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:57,239 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2023-11-28 23:55:57,239 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 121 states and 150 transitions. [2023-11-28 23:55:57,242 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2023-11-28 23:55:57,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 121 states to 97 states and 120 transitions. [2023-11-28 23:55:57,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 82 [2023-11-28 23:55:57,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 82 [2023-11-28 23:55:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 120 transitions. [2023-11-28 23:55:57,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:57,244 INFO L218 hiAutomatonCegarLoop]: Abstraction has 97 states and 120 transitions. [2023-11-28 23:55:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 120 transitions. [2023-11-28 23:55:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2023-11-28 23:55:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (29), 16 states have call predecessors, (29), 15 states have call successors, (29) [2023-11-28 23:55:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2023-11-28 23:55:57,251 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-11-28 23:55:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:55:57,252 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-11-28 23:55:57,252 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-28 23:55:57,253 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 116 transitions. [2023-11-28 23:55:57,254 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2023-11-28 23:55:57,254 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:57,254 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:57,255 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:57,255 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:57,255 INFO L748 eck$LassoCheckResult]: Stem: 3778#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 3751#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 3752#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 3781#$Ultimate##0 ~n := #in~n; 3783#L10 assume !(~n < 1); 3772#L12 assume !(1 == ~n); 3760#L15 call #t~ret4 := fibo2(~n - 1);< 3799#$Ultimate##0 ~n := #in~n; 3798#L20 assume !(~n < 1); 3797#L22 assume !(1 == ~n); 3745#L25 call #t~ret6 := fibo1(~n - 1);< 3754#$Ultimate##0 ~n := #in~n; 3756#L10 assume !(~n < 1); 3775#L12 assume !(1 == ~n); 3737#L15 call #t~ret4 := fibo2(~n - 1);< 3742#$Ultimate##0 ~n := #in~n; 3743#L20 assume !(~n < 1); 3736#L22 assume !(1 == ~n); 3738#L25 call #t~ret6 := fibo1(~n - 1);< 3754#$Ultimate##0 ~n := #in~n; 3755#L10 assume !(~n < 1); 3784#L12 assume 1 == ~n;#res := 1; 3744#fibo1FINAL assume true; 3746#fibo1EXIT >#48#return; 3747#L25-1 call #t~ret7 := fibo1(~n - 2);< 3748#$Ultimate##0 ~n := #in~n; 3753#L10 assume ~n < 1;#res := 0; 3771#fibo1FINAL assume true; 3749#fibo1EXIT >#50#return; 3750#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 3823#fibo2FINAL assume true; 3814#fibo2EXIT >#52#return; 3768#L15-1 [2023-11-28 23:55:57,256 INFO L750 eck$LassoCheckResult]: Loop: 3768#L15-1 call #t~ret5 := fibo2(~n - 2);< 3811#$Ultimate##0 ~n := #in~n; 3825#L20 assume !(~n < 1); 3785#L22 assume !(1 == ~n); 3765#L25 call #t~ret6 := fibo1(~n - 1);< 3759#$Ultimate##0 ~n := #in~n; 3786#L10 assume !(~n < 1); 3788#L12 assume !(1 == ~n); 3740#L15 call #t~ret4 := fibo2(~n - 1);< 3739#$Ultimate##0 ~n := #in~n; 3741#L20 assume !(~n < 1); 3785#L22 assume !(1 == ~n); 3765#L25 call #t~ret6 := fibo1(~n - 1);< 3759#$Ultimate##0 ~n := #in~n; 3786#L10 assume !(~n < 1); 3788#L12 assume 1 == ~n;#res := 1; 3791#fibo1FINAL assume true; 3792#fibo1EXIT >#48#return; 3793#L25-1 call #t~ret7 := fibo1(~n - 2);< 3812#$Ultimate##0 ~n := #in~n; 3819#L10 assume ~n < 1;#res := 0; 3787#fibo1FINAL assume true; 3824#fibo1EXIT >#50#return; 3794#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 3822#fibo2FINAL assume true; 3813#fibo2EXIT >#52#return; 3768#L15-1 [2023-11-28 23:55:57,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2023-11-28 23:55:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662000470] [2023-11-28 23:55:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:57,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:57,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:57,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1404661389, now seen corresponding path program 1 times [2023-11-28 23:55:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:57,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694721282] [2023-11-28 23:55:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:57,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:55:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:55:57,280 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:55:57,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1060289932, now seen corresponding path program 1 times [2023-11-28 23:55:57,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:57,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632625478] [2023-11-28 23:55:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-28 23:55:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-28 23:55:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-28 23:55:57,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632625478] [2023-11-28 23:55:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632625478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94627011] [2023-11-28 23:55:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,412 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-28 23:55:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:55:57,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-28 23:55:57,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-28 23:55:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94627011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:57,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 14 [2023-11-28 23:55:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752197984] [2023-11-28 23:55:57,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:57,884 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:57,884 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:57,884 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:57,884 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:57,884 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-28 23:55:57,885 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:57,885 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:57,885 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:57,885 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration6_Loop [2023-11-28 23:55:57,885 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:57,885 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:57,886 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,887 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,889 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,891 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,892 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,894 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,896 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,900 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,902 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:57,937 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:57,937 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-28 23:55:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,938 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-28 23:55:57,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:57,940 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:57,954 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:57,954 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:57,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2023-11-28 23:55:57,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:57,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,958 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-28 23:55:57,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:57,960 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:57,971 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:57,972 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=3} Honda state: {fibo1_#in~n=3} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:57,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:57,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,978 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-28 23:55:57,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:57,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:57,992 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:57,992 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:57,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2023-11-28 23:55:57,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,996 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-28 23:55:57,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:57,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:58,012 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:58,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:58,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2023-11-28 23:55:58,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,016 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-28 23:55:58,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:58,023 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:58,034 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:58,034 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:58,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2023-11-28 23:55:58,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,038 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-28 23:55:58,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:58,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:58,052 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:55:58,052 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=1} Honda state: {fibo1_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:55:58,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2023-11-28 23:55:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,056 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-28 23:55:58,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:55:58,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:58,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2023-11-28 23:55:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,073 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-28 23:55:58,075 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-28 23:55:58,075 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:55:58,088 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-28 23:55:58,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2023-11-28 23:55:58,090 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:55:58,090 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:55:58,090 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:55:58,090 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:55:58,090 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-28 23:55:58,090 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,090 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:55:58,090 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:55:58,090 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration6_Loop [2023-11-28 23:55:58,090 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:55:58,090 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:55:58,091 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,094 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,095 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,097 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,098 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,100 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,102 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,106 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:55:58,147 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:55:58,147 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-28 23:55:58,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,148 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-28 23:55:58,150 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 [2023-11-28 23:55:58,160 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,160 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,160 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,160 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,160 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,160 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,161 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,162 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2023-11-28 23:55:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,165 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-28 23:55:58,167 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-28 23:55:58,176 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,177 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,177 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,177 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,177 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,177 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,179 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:58,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,182 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-28 23:55:58,184 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 [2023-11-28 23:55:58,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,195 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,196 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:58,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,200 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-28 23:55:58,202 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 [2023-11-28 23:55:58,211 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,212 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,212 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,212 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,212 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,212 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,214 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2023-11-28 23:55:58,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,217 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-28 23:55:58,219 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 [2023-11-28 23:55:58,228 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,229 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,229 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,229 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,229 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,229 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,229 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,231 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2023-11-28 23:55:58,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,234 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-28 23:55:58,236 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 [2023-11-28 23:55:58,247 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,248 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,248 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,248 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,248 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,248 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,248 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,250 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2023-11-28 23:55:58,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,254 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2023-11-28 23:55:58,256 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 [2023-11-28 23:55:58,265 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,266 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,266 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,266 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,266 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,266 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,266 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,268 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:55:58,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2023-11-28 23:55:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,272 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2023-11-28 23:55:58,274 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 [2023-11-28 23:55:58,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:55:58,285 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:55:58,286 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:55:58,286 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:55:58,286 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:55:58,286 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:55:58,287 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:55:58,289 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-28 23:55:58,292 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-28 23:55:58,292 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-28 23:55:58,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:55:58,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:58,293 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2023-11-28 23:55:58,298 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-28 23:55:58,298 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-28 23:55:58,298 INFO L513 LassoAnalysis]: Proved termination. [2023-11-28 23:55:58,298 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-28 23:55:58,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2023-11-28 23:55:58,301 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-28 23:55:58,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:58,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:55:58,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:58,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 23:55:58,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:58,708 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2023-11-28 23:55:58,708 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 116 transitions. cyclomatic complexity: 25 Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-28 23:55:58,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2023-11-28 23:55:59,070 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 116 transitions. cyclomatic complexity: 25. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 323 states and 426 transitions. Complement of second has 46 states. [2023-11-28 23:55:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2023-11-28 23:55:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-28 23:55:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 70 transitions. [2023-11-28 23:55:59,073 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 70 transitions. Stem has 32 letters. Loop has 26 letters. [2023-11-28 23:55:59,074 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:59,074 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 70 transitions. Stem has 58 letters. Loop has 26 letters. [2023-11-28 23:55:59,075 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:59,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 70 transitions. Stem has 32 letters. Loop has 52 letters. [2023-11-28 23:55:59,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:55:59,076 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 323 states and 426 transitions. [2023-11-28 23:55:59,082 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 29 [2023-11-28 23:55:59,086 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 323 states to 280 states and 379 transitions. [2023-11-28 23:55:59,086 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 183 [2023-11-28 23:55:59,086 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 187 [2023-11-28 23:55:59,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 280 states and 379 transitions. [2023-11-28 23:55:59,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:59,090 INFO L218 hiAutomatonCegarLoop]: Abstraction has 280 states and 379 transitions. [2023-11-28 23:55:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states and 379 transitions. [2023-11-28 23:55:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 246. [2023-11-28 23:55:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 161 states have internal predecessors, (182), 50 states have call successors, (51), 33 states have call predecessors, (51), 40 states have return successors, (92), 51 states have call predecessors, (92), 47 states have call successors, (92) [2023-11-28 23:55:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 325 transitions. [2023-11-28 23:55:59,106 INFO L240 hiAutomatonCegarLoop]: Abstraction has 246 states and 325 transitions. [2023-11-28 23:55:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:55:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:55:59,107 INFO L87 Difference]: Start difference. First operand 246 states and 325 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-28 23:55:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:59,261 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2023-11-28 23:55:59,261 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 148 transitions. [2023-11-28 23:55:59,263 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2023-11-28 23:55:59,264 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 145 transitions. [2023-11-28 23:55:59,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 107 [2023-11-28 23:55:59,265 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 107 [2023-11-28 23:55:59,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 145 transitions. [2023-11-28 23:55:59,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:55:59,265 INFO L218 hiAutomatonCegarLoop]: Abstraction has 122 states and 145 transitions. [2023-11-28 23:55:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 145 transitions. [2023-11-28 23:55:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-11-28 23:55:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 76 states have (on average 1.131578947368421) internal successors, (86), 80 states have internal predecessors, (86), 20 states have call successors, (20), 15 states have call predecessors, (20), 20 states have return successors, (33), 20 states have call predecessors, (33), 17 states have call successors, (33) [2023-11-28 23:55:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2023-11-28 23:55:59,271 INFO L240 hiAutomatonCegarLoop]: Abstraction has 116 states and 139 transitions. [2023-11-28 23:55:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:55:59,272 INFO L428 stractBuchiCegarLoop]: Abstraction has 116 states and 139 transitions. [2023-11-28 23:55:59,272 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-28 23:55:59,272 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 139 transitions. [2023-11-28 23:55:59,273 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2023-11-28 23:55:59,274 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:55:59,274 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:55:59,275 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:59,276 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:59,276 INFO L748 eck$LassoCheckResult]: Stem: 5254#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 5231#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 5232#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 5257#$Ultimate##0 ~n := #in~n; 5258#L10 assume !(~n < 1); 5245#L12 assume !(1 == ~n); 5210#L15 call #t~ret4 := fibo2(~n - 1);< 5215#$Ultimate##0 ~n := #in~n; 5216#L20 assume !(~n < 1); 5209#L22 assume !(1 == ~n); 5211#L25 call #t~ret6 := fibo1(~n - 1);< 5228#$Ultimate##0 ~n := #in~n; 5230#L10 assume !(~n < 1); 5248#L12 assume !(1 == ~n); 5242#L15 call #t~ret4 := fibo2(~n - 1);< 5251#$Ultimate##0 ~n := #in~n; 5300#L20 assume !(~n < 1); 5299#L22 assume !(1 == ~n); 5224#L25 call #t~ret6 := fibo1(~n - 1);< 5228#$Ultimate##0 ~n := #in~n; 5230#L10 assume !(~n < 1); 5248#L12 assume !(1 == ~n); 5242#L15 call #t~ret4 := fibo2(~n - 1);< 5251#$Ultimate##0 ~n := #in~n; 5300#L20 assume !(~n < 1); 5299#L22 assume !(1 == ~n); 5224#L25 call #t~ret6 := fibo1(~n - 1);< 5228#$Ultimate##0 ~n := #in~n; 5229#L10 assume !(~n < 1); 5261#L12 assume 1 == ~n;#res := 1; 5267#fibo1FINAL assume true; 5298#fibo1EXIT >#48#return; 5218#L25-1 call #t~ret7 := fibo1(~n - 2);< 5226#$Ultimate##0 ~n := #in~n; 5227#L10 assume ~n < 1;#res := 0; 5217#fibo1FINAL assume true; 5219#fibo1EXIT >#50#return; 5294#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5292#fibo2FINAL assume true; 5288#fibo2EXIT >#52#return; 5207#L15-1 call #t~ret5 := fibo2(~n - 2);< 5284#$Ultimate##0 ~n := #in~n; 5252#L20 assume ~n < 1;#res := 0; 5208#fibo2FINAL assume true; 5246#fibo2EXIT >#54#return; 5282#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5280#fibo1FINAL assume true; 5274#fibo1EXIT >#48#return; 5235#L25-1 [2023-11-28 23:55:59,276 INFO L750 eck$LassoCheckResult]: Loop: 5235#L25-1 call #t~ret7 := fibo1(~n - 2);< 5241#$Ultimate##0 ~n := #in~n; 5263#L10 assume !(~n < 1); 5259#L12 assume !(1 == ~n); 5221#L15 call #t~ret4 := fibo2(~n - 1);< 5266#$Ultimate##0 ~n := #in~n; 5279#L20 assume !(~n < 1); 5277#L22 assume !(1 == ~n); 5236#L25 call #t~ret6 := fibo1(~n - 1);< 5241#$Ultimate##0 ~n := #in~n; 5263#L10 assume !(~n < 1); 5259#L12 assume !(1 == ~n); 5221#L15 call #t~ret4 := fibo2(~n - 1);< 5266#$Ultimate##0 ~n := #in~n; 5279#L20 assume !(~n < 1); 5277#L22 assume !(1 == ~n); 5236#L25 call #t~ret6 := fibo1(~n - 1);< 5241#$Ultimate##0 ~n := #in~n; 5263#L10 assume !(~n < 1); 5259#L12 assume 1 == ~n;#res := 1; 5260#fibo1FINAL assume true; 5317#fibo1EXIT >#48#return; 5220#L25-1 call #t~ret7 := fibo1(~n - 2);< 5222#$Ultimate##0 ~n := #in~n; 5319#L10 assume ~n < 1;#res := 0; 5269#fibo1FINAL assume true; 5307#fibo1EXIT >#50#return; 5233#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5234#fibo2FINAL assume true; 5289#fibo2EXIT >#52#return; 5286#L15-1 call #t~ret5 := fibo2(~n - 2);< 5287#$Ultimate##0 ~n := #in~n; 5320#L20 assume ~n < 1;#res := 0; 5314#fibo2FINAL assume true; 5313#fibo2EXIT >#54#return; 5283#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5281#fibo1FINAL assume true; 5275#fibo1EXIT >#48#return; 5235#L25-1 [2023-11-28 23:55:59,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash 316829921, now seen corresponding path program 1 times [2023-11-28 23:55:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139392020] [2023-11-28 23:55:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-28 23:55:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 23:55:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:55:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139392020] [2023-11-28 23:55:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139392020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229674907] [2023-11-28 23:55:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:59,472 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:59,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-28 23:55:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:55:59,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:55:59,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:55:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229674907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:59,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:59,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 19 [2023-11-28 23:55:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619312932] [2023-11-28 23:55:59,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:59,841 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:55:59,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1700861918, now seen corresponding path program 1 times [2023-11-28 23:55:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238925386] [2023-11-28 23:55:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-28 23:55:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:55:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:55:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 23:55:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-28 23:55:59,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238925386] [2023-11-28 23:55:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238925386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968630922] [2023-11-28 23:55:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:59,959 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-28 23:56:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:56:00,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 23:56:00,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 23:56:00,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968630922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:00,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 15 [2023-11-28 23:56:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339111602] [2023-11-28 23:56:00,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:00,290 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-28 23:56:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 23:56:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-28 23:56:00,291 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. cyclomatic complexity: 25 Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-28 23:56:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:00,402 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2023-11-28 23:56:00,402 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 126 states and 147 transitions. [2023-11-28 23:56:00,403 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2023-11-28 23:56:00,404 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 126 states to 122 states and 143 transitions. [2023-11-28 23:56:00,404 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 107 [2023-11-28 23:56:00,405 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 107 [2023-11-28 23:56:00,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 143 transitions. [2023-11-28 23:56:00,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:56:00,405 INFO L218 hiAutomatonCegarLoop]: Abstraction has 122 states and 143 transitions. [2023-11-28 23:56:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 143 transitions. [2023-11-28 23:56:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2023-11-28 23:56:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 81 states have internal predecessors, (87), 20 states have call successors, (20), 16 states have call predecessors, (20), 20 states have return successors, (32), 20 states have call predecessors, (32), 17 states have call successors, (32) [2023-11-28 23:56:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-11-28 23:56:00,410 INFO L240 hiAutomatonCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-11-28 23:56:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:56:00,414 INFO L428 stractBuchiCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-11-28 23:56:00,415 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-28 23:56:00,415 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 139 transitions. [2023-11-28 23:56:00,416 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2023-11-28 23:56:00,416 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:56:00,416 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:56:00,418 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:00,418 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:00,418 INFO L748 eck$LassoCheckResult]: Stem: 6157#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 6135#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 6136#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 6159#$Ultimate##0 ~n := #in~n; 6162#L10 assume !(~n < 1); 6150#L12 assume !(1 == ~n); 6118#L15 call #t~ret4 := fibo2(~n - 1);< 6176#$Ultimate##0 ~n := #in~n; 6193#L20 assume !(~n < 1); 6117#L22 assume !(1 == ~n); 6119#L25 call #t~ret6 := fibo1(~n - 1);< 6139#$Ultimate##0 ~n := #in~n; 6141#L10 assume !(~n < 1); 6154#L12 assume !(1 == ~n); 6124#L15 call #t~ret4 := fibo2(~n - 1);< 6123#$Ultimate##0 ~n := #in~n; 6125#L20 assume !(~n < 1); 6156#L22 assume !(1 == ~n); 6133#L25 call #t~ret6 := fibo1(~n - 1);< 6139#$Ultimate##0 ~n := #in~n; 6141#L10 assume !(~n < 1); 6154#L12 assume !(1 == ~n); 6124#L15 call #t~ret4 := fibo2(~n - 1);< 6123#$Ultimate##0 ~n := #in~n; 6125#L20 assume !(~n < 1); 6156#L22 assume !(1 == ~n); 6133#L25 call #t~ret6 := fibo1(~n - 1);< 6139#$Ultimate##0 ~n := #in~n; 6140#L10 assume !(~n < 1); 6170#L12 assume 1 == ~n;#res := 1; 6174#fibo1FINAL assume true; 6220#fibo1EXIT >#48#return; 6127#L25-1 call #t~ret7 := fibo1(~n - 2);< 6218#$Ultimate##0 ~n := #in~n; 6153#L10 assume ~n < 1;#res := 0; 6126#fibo1FINAL assume true; 6128#fibo1EXIT >#50#return; 6216#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6215#fibo2FINAL assume true; 6192#fibo2EXIT >#52#return; 6115#L15-1 call #t~ret5 := fibo2(~n - 2);< 6191#$Ultimate##0 ~n := #in~n; 6155#L20 assume !(~n < 1); 6114#L22 assume 1 == ~n;#res := 1; 6116#fibo2FINAL assume true; 6190#fibo2EXIT >#54#return; 6188#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6186#fibo1FINAL assume true; 6183#fibo1EXIT >#48#return; 6164#L25-1 [2023-11-28 23:56:00,418 INFO L750 eck$LassoCheckResult]: Loop: 6164#L25-1 call #t~ret7 := fibo1(~n - 2);< 6131#$Ultimate##0 ~n := #in~n; 6228#L10 assume !(~n < 1); 6163#L12 assume !(1 == ~n); 6147#L15 call #t~ret4 := fibo2(~n - 1);< 6172#$Ultimate##0 ~n := #in~n; 6171#L20 assume !(~n < 1); 6168#L22 assume !(1 == ~n); 6165#L25 call #t~ret6 := fibo1(~n - 1);< 6143#$Ultimate##0 ~n := #in~n; 6177#L10 assume !(~n < 1); 6163#L12 assume !(1 == ~n); 6147#L15 call #t~ret4 := fibo2(~n - 1);< 6172#$Ultimate##0 ~n := #in~n; 6171#L20 assume !(~n < 1); 6168#L22 assume !(1 == ~n); 6165#L25 call #t~ret6 := fibo1(~n - 1);< 6143#$Ultimate##0 ~n := #in~n; 6177#L10 assume !(~n < 1); 6163#L12 assume 1 == ~n;#res := 1; 6167#fibo1FINAL assume true; 6223#fibo1EXIT >#48#return; 6181#L25-1 call #t~ret7 := fibo1(~n - 2);< 6222#$Ultimate##0 ~n := #in~n; 6229#L10 assume ~n < 1;#res := 0; 6227#fibo1FINAL assume true; 6221#fibo1EXIT >#50#return; 6219#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6217#fibo2FINAL assume true; 6213#fibo2EXIT >#52#return; 6158#L15-1 call #t~ret5 := fibo2(~n - 2);< 6203#$Ultimate##0 ~n := #in~n; 6208#L20 assume !(~n < 1); 6206#L22 assume 1 == ~n;#res := 1; 6205#fibo2FINAL assume true; 6202#fibo2EXIT >#54#return; 6201#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6185#fibo1FINAL assume true; 6182#fibo1EXIT >#48#return; 6164#L25-1 [2023-11-28 23:56:00,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1955236566, now seen corresponding path program 1 times [2023-11-28 23:56:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:00,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449806315] [2023-11-28 23:56:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-28 23:56:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:56:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:56:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:56:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 23:56:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 23:56:00,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449806315] [2023-11-28 23:56:00,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449806315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339205750] [2023-11-28 23:56:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:00,590 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:00,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-28 23:56:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:56:00,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:56:00,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:56:00,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339205750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:00,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:00,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 19 [2023-11-28 23:56:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446650314] [2023-11-28 23:56:00,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:00,958 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:56:00,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash -463668299, now seen corresponding path program 1 times [2023-11-28 23:56:00,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:00,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396305180] [2023-11-28 23:56:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:56:00,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:56:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:56:00,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:56:01,308 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:56:01,308 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:56:01,308 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:56:01,308 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:56:01,308 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-28 23:56:01,308 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,308 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:56:01,308 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:56:01,308 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration8_Loop [2023-11-28 23:56:01,309 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:56:01,309 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:56:01,309 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,312 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,316 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,318 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,319 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,321 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,322 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,323 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,325 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:56:01,359 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-28 23:56:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,360 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-28 23:56:01,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:56:01,363 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:01,374 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:56:01,374 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=4} Honda state: {fibo2_#in~n=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:56:01,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2023-11-28 23:56:01,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,378 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-28 23:56:01,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:56:01,380 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:01,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2023-11-28 23:56:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,400 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-28 23:56:01,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-28 23:56:01,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:01,415 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-28 23:56:01,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:01,418 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:56:01,418 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:56:01,418 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:56:01,418 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:56:01,418 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-28 23:56:01,418 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,418 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:56:01,418 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:56:01,418 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration8_Loop [2023-11-28 23:56:01,418 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:56:01,419 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:56:01,419 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,423 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,425 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,429 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,431 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,433 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,434 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,436 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,438 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:01,474 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:56:01,475 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-28 23:56:01,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,476 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-28 23:56:01,478 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 [2023-11-28 23:56:01,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:56:01,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:56:01,488 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:56:01,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:56:01,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:56:01,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:56:01,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:56:01,490 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:56:01,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2023-11-28 23:56:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,493 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-28 23:56:01,495 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 [2023-11-28 23:56:01,505 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:56:01,505 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:56:01,505 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:56:01,505 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:56:01,505 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:56:01,506 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:56:01,506 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:56:01,507 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:56:01,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2023-11-28 23:56:01,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,510 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-28 23:56:01,513 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 [2023-11-28 23:56:01,522 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:56:01,522 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:56:01,522 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:56:01,523 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:56:01,523 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:56:01,523 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:56:01,523 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:56:01,526 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-28 23:56:01,528 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-28 23:56:01,528 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-28 23:56:01,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:01,529 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:01,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2023-11-28 23:56:01,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-28 23:56:01,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-28 23:56:01,532 INFO L513 LassoAnalysis]: Proved termination. [2023-11-28 23:56:01,532 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2023-11-28 23:56:01,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2023-11-28 23:56:01,534 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-28 23:56:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:01,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:56:01,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:01,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Ended with exit code 0 [2023-11-28 23:56:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:01,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:56:01,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:56:02,117 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 11 loop predicates [2023-11-28 23:56:02,117 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23 Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:02,261 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Result 142 states and 165 transitions. Complement of second has 13 states. [2023-11-28 23:56:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 32 transitions. [2023-11-28 23:56:02,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 32 transitions. Stem has 49 letters. Loop has 39 letters. [2023-11-28 23:56:02,263 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:02,263 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-28 23:56:02,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:02,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:56:02,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:02,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:56:02,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:56:02,878 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 11 loop predicates [2023-11-28 23:56:02,878 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23 Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:03,031 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Result 142 states and 165 transitions. Complement of second has 13 states. [2023-11-28 23:56:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 32 transitions. [2023-11-28 23:56:03,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 32 transitions. Stem has 49 letters. Loop has 39 letters. [2023-11-28 23:56:03,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:03,033 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-28 23:56:03,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:03,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:56:03,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:03,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:56:03,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:56:03,580 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 11 loop predicates [2023-11-28 23:56:03,581 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23 Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:04,035 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 139 transitions. cyclomatic complexity: 23. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Result 559 states and 690 transitions. Complement of second has 139 states. [2023-11-28 23:56:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 81 transitions. [2023-11-28 23:56:04,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 81 transitions. Stem has 49 letters. Loop has 39 letters. [2023-11-28 23:56:04,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:04,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 81 transitions. Stem has 88 letters. Loop has 39 letters. [2023-11-28 23:56:04,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:04,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 81 transitions. Stem has 49 letters. Loop has 78 letters. [2023-11-28 23:56:04,044 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:04,044 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 559 states and 690 transitions. [2023-11-28 23:56:04,051 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 29 [2023-11-28 23:56:04,055 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 559 states to 402 states and 496 transitions. [2023-11-28 23:56:04,055 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 227 [2023-11-28 23:56:04,055 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 248 [2023-11-28 23:56:04,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 496 transitions. [2023-11-28 23:56:04,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:56:04,056 INFO L218 hiAutomatonCegarLoop]: Abstraction has 402 states and 496 transitions. [2023-11-28 23:56:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 496 transitions. [2023-11-28 23:56:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 330. [2023-11-28 23:56:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 212 states have (on average 1.1367924528301887) internal successors, (241), 224 states have internal predecessors, (241), 62 states have call successors, (64), 43 states have call predecessors, (64), 56 states have return successors, (94), 62 states have call predecessors, (94), 59 states have call successors, (94) [2023-11-28 23:56:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 399 transitions. [2023-11-28 23:56:04,069 INFO L240 hiAutomatonCegarLoop]: Abstraction has 330 states and 399 transitions. [2023-11-28 23:56:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:56:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:56:04,070 INFO L87 Difference]: Start difference. First operand 330 states and 399 transitions. Second operand has 20 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 11 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-28 23:56:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:04,353 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2023-11-28 23:56:04,353 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 228 states and 240 transitions. [2023-11-28 23:56:04,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2023-11-28 23:56:04,357 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 228 states to 117 states and 123 transitions. [2023-11-28 23:56:04,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 95 [2023-11-28 23:56:04,357 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 102 [2023-11-28 23:56:04,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 123 transitions. [2023-11-28 23:56:04,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-28 23:56:04,357 INFO L218 hiAutomatonCegarLoop]: Abstraction has 117 states and 123 transitions. [2023-11-28 23:56:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 123 transitions. [2023-11-28 23:56:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-28 23:56:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 21 states have call successors, (21), 18 states have call predecessors, (21), 17 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2023-11-28 23:56:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2023-11-28 23:56:04,361 INFO L240 hiAutomatonCegarLoop]: Abstraction has 116 states and 122 transitions. [2023-11-28 23:56:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 23:56:04,362 INFO L428 stractBuchiCegarLoop]: Abstraction has 116 states and 122 transitions. [2023-11-28 23:56:04,362 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-28 23:56:04,362 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 122 transitions. [2023-11-28 23:56:04,363 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2023-11-28 23:56:04,363 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-28 23:56:04,363 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-28 23:56:04,364 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:04,364 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:04,364 INFO L748 eck$LassoCheckResult]: Stem: 9106#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 9084#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 9085#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 9109#$Ultimate##0 ~n := #in~n; 9110#L10 assume !(~n < 1); 9094#L12 assume !(1 == ~n); 9067#L15 call #t~ret4 := fibo2(~n - 1);< 9071#$Ultimate##0 ~n := #in~n; 9072#L20 assume !(~n < 1); 9066#L22 assume !(1 == ~n); 9068#L25 call #t~ret6 := fibo1(~n - 1);< 9080#$Ultimate##0 ~n := #in~n; 9083#L10 assume !(~n < 1); 9097#L12 assume !(1 == ~n); 9089#L15 call #t~ret4 := fibo2(~n - 1);< 9099#$Ultimate##0 ~n := #in~n; 9103#L20 assume !(~n < 1); 9104#L22 assume !(1 == ~n); 9081#L25 call #t~ret6 := fibo1(~n - 1);< 9080#$Ultimate##0 ~n := #in~n; 9082#L10 assume !(~n < 1); 9142#L12 assume 1 == ~n;#res := 1; 9141#fibo1FINAL assume true; 9138#fibo1EXIT >#48#return; 9136#L25-1 call #t~ret7 := fibo1(~n - 2);< 9137#$Ultimate##0 ~n := #in~n; 9140#L10 assume ~n < 1;#res := 0; 9139#fibo1FINAL assume true; 9135#fibo1EXIT >#50#return; 9134#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 9133#fibo2FINAL assume true; 9131#fibo2EXIT >#52#return; 9127#L15-1 call #t~ret5 := fibo2(~n - 2);< 9128#$Ultimate##0 ~n := #in~n; 9132#L20 assume !(~n < 1); 9130#L22 assume 1 == ~n;#res := 1; 9129#fibo2FINAL assume true; 9126#fibo2EXIT >#54#return; 9125#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 9124#fibo1FINAL assume true; 9123#fibo1EXIT >#48#return; 9093#L25-1 call #t~ret7 := fibo1(~n - 2);< 9122#$Ultimate##0 ~n := #in~n; 9170#L10 assume !(~n < 1); 9091#L12 assume !(1 == ~n); 9076#L15 call #t~ret4 := fibo2(~n - 1);< 9151#$Ultimate##0 ~n := #in~n; 9167#L20 assume !(~n < 1); 9164#L22 assume !(1 == ~n); 9098#L25 call #t~ret6 := fibo1(~n - 1);< 9175#$Ultimate##0 ~n := #in~n; 9178#L10 assume !(~n < 1); 9177#L12 assume !(1 == ~n); 9064#L15 [2023-11-28 23:56:04,364 INFO L750 eck$LassoCheckResult]: Loop: 9064#L15 call #t~ret4 := fibo2(~n - 1);< 9069#$Ultimate##0 ~n := #in~n; 9070#L20 assume !(~n < 1); 9063#L22 assume !(1 == ~n); 9065#L25 call #t~ret6 := fibo1(~n - 1);< 9088#$Ultimate##0 ~n := #in~n; 9153#L10 assume !(~n < 1); 9149#L12 assume !(1 == ~n); 9064#L15 [2023-11-28 23:56:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -259516613, now seen corresponding path program 2 times [2023-11-28 23:56:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:04,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14844481] [2023-11-28 23:56:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 23:56:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:56:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:56:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 23:56:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 23:56:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 23:56:04,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14844481] [2023-11-28 23:56:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14844481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692380015] [2023-11-28 23:56:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:56:04,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:04,519 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:04,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-28 23:56:04,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:56:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:04,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:56:04,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 23:56:04,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 23:56:04,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692380015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:04,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:04,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 14 [2023-11-28 23:56:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175176310] [2023-11-28 23:56:04,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:04,757 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-28 23:56:04,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 2 times [2023-11-28 23:56:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707007447] [2023-11-28 23:56:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:04,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:56:04,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:56:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:56:04,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:56:04,890 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:56:04,890 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:56:04,890 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:56:04,890 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:56:04,890 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-28 23:56:04,890 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:04,890 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:56:04,890 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:56:04,890 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration9_Loop [2023-11-28 23:56:04,890 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:56:04,891 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:56:04,891 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,893 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,902 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,904 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,906 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,908 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,910 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,912 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:04,954 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:56:04,954 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-28 23:56:04,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:04,955 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:04,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2023-11-28 23:56:04,958 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:56:04,958 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:04,969 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-28 23:56:04,969 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-28 23:56:04,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2023-11-28 23:56:04,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:04,973 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:04,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-28 23:56:04,975 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-28 23:56:04,975 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:04,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Ended with exit code 0 [2023-11-28 23:56:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:05,000 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:05,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-28 23:56:05,002 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-28 23:56:05,002 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-28 23:56:07,133 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-28 23:56:07,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:07,136 INFO L210 LassoAnalysis]: Preferences: [2023-11-28 23:56:07,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-28 23:56:07,136 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-28 23:56:07,136 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-28 23:56:07,136 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-28 23:56:07,136 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:07,136 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-28 23:56:07,136 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-28 23:56:07,136 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration9_Loop [2023-11-28 23:56:07,136 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-28 23:56:07,136 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-28 23:56:07,137 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,139 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,146 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,147 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,148 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,149 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,150 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,152 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-28 23:56:07,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-28 23:56:07,185 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-28 23:56:07,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:07,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:07,186 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:07,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-28 23:56:07,188 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 [2023-11-28 23:56:07,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:56:07,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:56:07,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:56:07,198 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:56:07,199 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:56:07,199 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:56:07,199 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:56:07,200 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-28 23:56:07,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Ended with exit code 0 [2023-11-28 23:56:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:07,204 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:07,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2023-11-28 23:56:07,206 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 [2023-11-28 23:56:07,215 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-28 23:56:07,216 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-28 23:56:07,216 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-28 23:56:07,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-28 23:56:07,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-28 23:56:07,217 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-28 23:56:07,217 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-28 23:56:07,220 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-28 23:56:07,221 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-28 23:56:07,222 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-28 23:56:07,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-28 23:56:07,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:07,223 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:07,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2023-11-28 23:56:07,224 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-28 23:56:07,224 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-28 23:56:07,225 INFO L513 LassoAnalysis]: Proved termination. [2023-11-28 23:56:07,225 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-28 23:56:07,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:07,227 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-28 23:56:07,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:07,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:56:07,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:07,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:56:07,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:07,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2023-11-28 23:56:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:07,550 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-28 23:56:07,551 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:07,613 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 130 states and 137 transitions. Complement of second has 19 states. [2023-11-28 23:56:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2023-11-28 23:56:07,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 53 letters. Loop has 8 letters. [2023-11-28 23:56:07,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:07,614 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-28 23:56:07,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:07,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:56:07,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:07,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:56:07,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:07,942 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-28 23:56:07,942 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:08,040 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 136 states and 143 transitions. Complement of second has 21 states. [2023-11-28 23:56:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2023-11-28 23:56:08,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 53 letters. Loop has 8 letters. [2023-11-28 23:56:08,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:08,042 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-28 23:56:08,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:08,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:56:08,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:08,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:56:08,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:08,395 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 6 loop predicates [2023-11-28 23:56:08,395 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:08,488 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 116 states and 122 transitions. cyclomatic complexity: 9. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 189 states and 199 transitions. Complement of second has 30 states. [2023-11-28 23:56:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-28 23:56:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2023-11-28 23:56:08,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 53 letters. Loop has 8 letters. [2023-11-28 23:56:08,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:08,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 61 letters. Loop has 8 letters. [2023-11-28 23:56:08,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:08,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 53 letters. Loop has 16 letters. [2023-11-28 23:56:08,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-28 23:56:08,491 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 189 states and 199 transitions. [2023-11-28 23:56:08,493 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-28 23:56:08,493 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 189 states to 0 states and 0 transitions. [2023-11-28 23:56:08,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-28 23:56:08,494 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-28 23:56:08,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-28 23:56:08,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:08,494 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 23:56:08,494 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 23:56:08,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:56:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:56:08,495 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 23:56:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:08,495 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-28 23:56:08,495 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-28 23:56:08,495 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-28 23:56:08,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:08,495 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 23:56:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:56:08,496 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 23:56:08,496 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-11-28 23:56:08,496 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-28 23:56:08,496 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-28 23:56:08,496 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-28 23:56:08,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 11:56:08 BoogieIcfgContainer [2023-11-28 23:56:08,503 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-28 23:56:08,503 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 23:56:08,504 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 23:56:08,504 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 23:56:08,504 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:50" (3/4) ... [2023-11-28 23:56:08,506 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-28 23:56:08,507 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 23:56:08,507 INFO L158 Benchmark]: Toolchain (without parser) took 19019.73ms. Allocated memory was 134.2MB in the beginning and 209.7MB in the end (delta: 75.5MB). Free memory was 97.7MB in the beginning and 159.4MB in the end (delta: -61.7MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2023-11-28 23:56:08,508 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 107.0MB. Free memory was 62.9MB in the beginning and 62.7MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:56:08,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.30ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 87.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 23:56:08,508 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.39ms. Allocated memory is still 134.2MB. Free memory was 87.6MB in the beginning and 86.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 23:56:08,508 INFO L158 Benchmark]: Boogie Preprocessor took 38.22ms. Allocated memory is still 134.2MB. Free memory was 86.2MB in the beginning and 84.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:56:08,509 INFO L158 Benchmark]: RCFGBuilder took 277.76ms. Allocated memory is still 134.2MB. Free memory was 84.4MB in the beginning and 74.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-28 23:56:08,509 INFO L158 Benchmark]: BuchiAutomizer took 18427.19ms. Allocated memory was 134.2MB in the beginning and 209.7MB in the end (delta: 75.5MB). Free memory was 74.7MB in the beginning and 159.4MB in the end (delta: -84.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:56:08,509 INFO L158 Benchmark]: Witness Printer took 3.21ms. Allocated memory is still 209.7MB. Free memory is still 159.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:56:08,511 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 107.0MB. Free memory was 62.9MB in the beginning and 62.7MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.30ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 87.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.39ms. Allocated memory is still 134.2MB. Free memory was 87.6MB in the beginning and 86.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.22ms. Allocated memory is still 134.2MB. Free memory was 86.2MB in the beginning and 84.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 277.76ms. Allocated memory is still 134.2MB. Free memory was 84.4MB in the beginning and 74.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 18427.19ms. Allocated memory was 134.2MB in the beginning and 209.7MB in the end (delta: 75.5MB). Free memory was 74.7MB in the beginning and 159.4MB in the end (delta: -84.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.21ms. Allocated memory is still 209.7MB. Free memory is still 159.4MB. 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 13 terminating modules (8 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 13 locations. One nondeterministic module has affine ranking function n and consists of 15 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 8 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 18.3s and 10 iterations. TraceHistogramMax:8. Analysis of lassos took 11.3s. Construction of modules took 1.3s. Büchi inclusion checks took 5.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 180 StatesRemovedByMinimization, 11 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 [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/51 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 772 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 745 mSDsluCounter, 1307 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 973 mSDsCounter, 379 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2228 IncrementalHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 379 mSolverCounterUnsat, 334 mSDtfsCounter, 2228 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI4 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp74 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf90 smp81 dnf100 smp100 tf113 neg100 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 20 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.7s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-28 23:56:08,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-28 23:56:08,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:08,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-28 23:56:09,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-28 23:56:09,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:09,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:09,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-28 23:56:09,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-28 23:56:10,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:10,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec54025d-8459-48e4-8a16-a7fc25d43609/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE