./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30e01a73 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_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ --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 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:26:38,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:26:38,844 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-23 22:26:38,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:26:38,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:26:38,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:26:38,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:26:38,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:26:38,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:26:38,901 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:26:38,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:26:38,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:26:38,903 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:26:38,905 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-23 22:26:38,905 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-23 22:26:38,906 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-23 22:26:38,906 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-23 22:26:38,906 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-23 22:26:38,907 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-23 22:26:38,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:26:38,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-23 22:26:38,908 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:26:38,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:26:38,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:26:38,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:26:38,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-23 22:26:38,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-23 22:26:38,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-23 22:26:38,911 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:26:38,912 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:26:38,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:26:38,914 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-23 22:26:38,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:26:38,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:26:38,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:26:38,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:26:38,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:26:38,916 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-23 22:26:38,916 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_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2023-11-23 22:26:39,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:26:39,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:26:39,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:26:39,276 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:26:39,277 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:26:39,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-23 22:26:42,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:26:42,624 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:26:42,625 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-23 22:26:42,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/data/e41b6de29/8aa0d7b808354d1a93ffb18a6589b65d/FLAG4069097d9 [2023-11-23 22:26:42,649 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/data/e41b6de29/8aa0d7b808354d1a93ffb18a6589b65d [2023-11-23 22:26:42,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:26:42,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:26:42,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:26:42,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:26:42,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:26:42,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb4dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42, skipping insertion in model container [2023-11-23 22:26:42,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,686 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:26:42,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:26:42,878 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:26:42,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:26:42,926 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:26:42,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42 WrapperNode [2023-11-23 22:26:42,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:26:42,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:26:42,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:26:42,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:26:42,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,963 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2023-11-23 22:26:42,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:26:42,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:26:42,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:26:42,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:26:42,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,978 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,989 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:26:42,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,995 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,998 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:26:42,999 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:26:42,999 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:26:42,999 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:26:43,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:43,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:43,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:43,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-23 22:26:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-23 22:26:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-23 22:26:43,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:26:43,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:26:43,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:26:43,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:26:43,159 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:26:43,166 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:26:43,295 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:26:43,306 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:26:43,306 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 22:26:43,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:43 BoogieIcfgContainer [2023-11-23 22:26:43,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:26:43,310 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-23 22:26:43,311 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-23 22:26:43,316 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-23 22:26:43,317 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:26:43,317 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 10:26:42" (1/3) ... [2023-11-23 22:26:43,318 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@943bd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 10:26:43, skipping insertion in model container [2023-11-23 22:26:43,319 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:26:43,319 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42" (2/3) ... [2023-11-23 22:26:43,320 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@943bd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 10:26:43, skipping insertion in model container [2023-11-23 22:26:43,320 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:26:43,320 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:43" (3/3) ... [2023-11-23 22:26:43,322 INFO L332 chiAutomizerObserver]: Analyzing ICFG Fibonacci04.c [2023-11-23 22:26:43,384 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-23 22:26:43,384 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-23 22:26:43,384 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-23 22:26:43,385 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-23 22:26:43,385 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-23 22:26:43,385 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-23 22:26:43,385 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-23 22:26:43,385 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-23 22:26:43,390 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:26:43,414 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:43,415 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:43,415 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:43,423 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-23 22:26:43,423 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:26:43,423 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-23 22:26:43,425 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:26:43,428 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:43,428 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:43,428 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:43,429 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-23 22:26:43,429 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:26:43,438 INFO L748 eck$LassoCheckResult]: Stem: 14#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 6#L31true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 10#$Ultimate##0true [2023-11-23 22:26:43,438 INFO L750 eck$LassoCheckResult]: Loop: 10#$Ultimate##0true ~n := #in~n; 16#L19true assume !(~n < 1); 5#L21true assume !(1 == ~n); 13#L24true call #t~ret4 := fibonacci(~n - 1);< 10#$Ultimate##0true [2023-11-23 22:26:43,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:43,446 INFO L85 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2023-11-23 22:26:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:43,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719827975] [2023-11-23 22:26:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,669 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:43,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2023-11-23 22:26:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:43,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111349745] [2023-11-23 22:26:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:43,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2023-11-23 22:26:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:43,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068017121] [2023-11-23 22:26:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,766 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:43,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:43,995 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:43,996 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:43,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:43,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:43,996 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:26:43,996 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:43,997 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:43,997 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:43,997 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration1_Loop [2023-11-23 22:26:43,997 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:43,998 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:44,020 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,038 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,044 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,052 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,070 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,156 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:44,158 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:26:44,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-23 22:26:44,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:44,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:44,204 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:26:44,204 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:26:44,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,258 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:44,258 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-23 22:26:44,281 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:26:44,281 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:26:44,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-23 22:26:44,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:44,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:44,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:26:44,340 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:26:44,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-23 22:26:44,360 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:44,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:44,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:26:44,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:44,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-23 22:26:44,510 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:26:44,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,514 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:44,514 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:44,514 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:44,514 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:44,514 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:26:44,514 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,514 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:44,515 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:44,515 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration1_Loop [2023-11-23 22:26:44,515 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:44,515 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:44,516 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,520 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,523 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,525 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,535 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:44,584 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:44,590 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:26:44,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-23 22:26:44,605 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 [2023-11-23 22:26:44,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:44,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:44,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:44,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:44,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:44,623 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:44,623 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:44,643 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:44,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,681 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 [2023-11-23 22:26:44,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:44,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:44,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:44,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:44,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:44,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:44,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-23 22:26:44,712 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:44,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-23 22:26:44,738 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 [2023-11-23 22:26:44,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:44,751 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:44,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:44,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:44,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:44,755 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:44,755 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:44,771 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:44,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,798 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 [2023-11-23 22:26:44,811 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:44,811 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:44,811 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:44,811 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:44,811 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:44,814 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:44,814 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-23 22:26:44,846 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:26:44,852 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:26:44,852 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:26:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:44,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:44,900 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:26:44,901 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:26:44,901 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:26:44,901 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-23 22:26:44,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-23 22:26:44,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:44,929 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:26:44,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:44,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:26:44,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:26:45,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:26:45,123 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-11-23 22:26:45,128 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:26:45,276 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2023-11-23 22:26:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:26:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2023-11-23 22:26:45,286 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2023-11-23 22:26:45,288 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:45,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2023-11-23 22:26:45,288 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:45,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-23 22:26:45,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:45,289 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2023-11-23 22:26:45,294 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:45,303 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2023-11-23 22:26:45,304 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-23 22:26:45,305 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-11-23 22:26:45,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2023-11-23 22:26:45,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:45,306 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-23 22:26:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2023-11-23 22:26:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-23 22:26:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 22:26:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-23 22:26:45,334 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-23 22:26:45,334 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-23 22:26:45,335 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-23 22:26:45,335 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2023-11-23 22:26:45,336 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:45,336 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:45,336 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:45,337 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:45,337 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:45,338 INFO L748 eck$LassoCheckResult]: Stem: 130#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 131#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 123#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 135#$Ultimate##0 ~n := #in~n; 137#L19 assume !(~n < 1); 134#L21 assume !(1 == ~n); 122#L24 call #t~ret4 := fibonacci(~n - 1);< 128#$Ultimate##0 ~n := #in~n; 136#L19 assume ~n < 1;#res := 0; 133#fibonacciFINAL assume true; 129#fibonacciEXIT >#31#return; 125#L24-1 [2023-11-23 22:26:45,338 INFO L750 eck$LassoCheckResult]: Loop: 125#L24-1 call #t~ret5 := fibonacci(~n - 2);< 127#$Ultimate##0 ~n := #in~n; 140#L19 assume !(~n < 1); 139#L21 assume !(1 == ~n); 124#L24 call #t~ret4 := fibonacci(~n - 1);< 127#$Ultimate##0 ~n := #in~n; 140#L19 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 138#fibonacciEXIT >#31#return; 125#L24-1 [2023-11-23 22:26:45,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2023-11-23 22:26:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790650682] [2023-11-23 22:26:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:26:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:26:45,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:45,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790650682] [2023-11-23 22:26:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790650682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:45,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:45,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:26:45,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911867503] [2023-11-23 22:26:45,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:45,551 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-23 22:26:45,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2023-11-23 22:26:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765026556] [2023-11-23 22:26:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-23 22:26:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:26:45,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765026556] [2023-11-23 22:26:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765026556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:26:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88251401] [2023-11-23 22:26:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:45,642 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-23 22:26:45,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:26:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:26:45,647 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:26:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:45,730 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-23 22:26:45,730 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2023-11-23 22:26:45,732 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:45,734 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2023-11-23 22:26:45,734 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-11-23 22:26:45,734 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2023-11-23 22:26:45,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2023-11-23 22:26:45,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:45,735 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-23 22:26:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2023-11-23 22:26:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 22:26:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 22:26:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-23 22:26:45,741 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-23 22:26:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:26:45,742 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-23 22:26:45,743 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-23 22:26:45,743 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2023-11-23 22:26:45,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:45,744 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:45,744 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:45,746 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:45,746 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 22:26:45,746 INFO L748 eck$LassoCheckResult]: Stem: 203#$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(14, 2);call #Ultimate.allocInit(12, 3); 204#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 195#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 208#$Ultimate##0 ~n := #in~n; 210#L19 assume !(~n < 1); 207#L21 assume !(1 == ~n); 196#L24 call #t~ret4 := fibonacci(~n - 1);< 201#$Ultimate##0 ~n := #in~n; 209#L19 assume !(~n < 1); 205#L21 assume 1 == ~n;#res := 1; 206#fibonacciFINAL assume true; 202#fibonacciEXIT >#31#return; 198#L24-1 [2023-11-23 22:26:45,747 INFO L750 eck$LassoCheckResult]: Loop: 198#L24-1 call #t~ret5 := fibonacci(~n - 2);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume !(1 == ~n); 197#L24 call #t~ret4 := fibonacci(~n - 1);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume !(1 == ~n); 197#L24 call #t~ret4 := fibonacci(~n - 1);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume 1 == ~n;#res := 1; 214#fibonacciFINAL assume true; 217#fibonacciEXIT >#31#return; 198#L24-1 call #t~ret5 := fibonacci(~n - 2);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume ~n < 1;#res := 0; 216#fibonacciFINAL assume true; 212#fibonacciEXIT >#33#return; 194#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 199#fibonacciFINAL assume true; 211#fibonacciEXIT >#31#return; 198#L24-1 [2023-11-23 22:26:45,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,747 INFO L85 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2023-11-23 22:26:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643199311] [2023-11-23 22:26:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:45,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:45,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:45,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 1 times [2023-11-23 22:26:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365243369] [2023-11-23 22:26:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:45,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:45,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:45,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,796 INFO L85 PathProgramCache]: Analyzing trace with hash 998757605, now seen corresponding path program 1 times [2023-11-23 22:26:45,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851797776] [2023-11-23 22:26:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:26:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 22:26:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:46,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:26:46,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851797776] [2023-11-23 22:26:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851797776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:26:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897069764] [2023-11-23 22:26:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:46,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:46,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:26:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:46,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:26:46,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 22:26:46,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:26:46,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:26:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897069764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:26:46,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:26:46,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-23 22:26:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895794321] [2023-11-23 22:26:46,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:26:46,811 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:46,811 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:46,811 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:46,811 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:46,812 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:26:46,812 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:46,812 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:46,812 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:46,812 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration3_Loop [2023-11-23 22:26:46,812 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:46,812 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:46,814 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:46,827 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:46,830 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:46,833 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:46,896 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:46,896 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:26:46,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:46,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:46,908 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:46,908 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:46,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-23 22:26:46,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:46,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:46,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:46,961 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:46,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:26:46,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:46,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-23 22:26:47,288 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:26:47,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:47,292 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:47,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:47,293 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:47,293 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:47,293 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:26:47,293 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,293 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:47,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:47,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration3_Loop [2023-11-23 22:26:47,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:47,293 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:47,294 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:47,297 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:47,300 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:47,303 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:47,371 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:47,371 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:26:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-23 22:26:47,385 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 [2023-11-23 22:26:47,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:47,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:47,398 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:47,398 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:47,398 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:47,399 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:47,399 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:47,402 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:47,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-23 22:26:47,419 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 [2023-11-23 22:26:47,432 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:47,432 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:47,432 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:47,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:47,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:47,433 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:47,434 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:47,444 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:47,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-23 22:26:47,469 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 [2023-11-23 22:26:47,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:47,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:47,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:47,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:47,481 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:47,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:47,482 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:47,500 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:47,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:47,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-23 22:26:47,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-23 22:26:47,544 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:47,544 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:47,545 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:47,545 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:47,545 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:47,546 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:47,546 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:47,564 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:26:47,586 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:26:47,586 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:26:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,606 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:26:47,606 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:26:47,606 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:26:47,606 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:26:47,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-23 22:26:47,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:47,631 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:26:47,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:47,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:26:47,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:47,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:26:47,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:26:48,006 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-23 22:26:48,006 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:26:48,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:48,340 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 159 states and 215 transitions. Complement of second has 48 states. [2023-11-23 22:26:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:26:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2023-11-23 22:26:48,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2023-11-23 22:26:48,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:48,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2023-11-23 22:26:48,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:48,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2023-11-23 22:26:48,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:48,348 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2023-11-23 22:26:48,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2023-11-23 22:26:48,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2023-11-23 22:26:48,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2023-11-23 22:26:48,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2023-11-23 22:26:48,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2023-11-23 22:26:48,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:48,364 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 180 transitions. [2023-11-23 22:26:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2023-11-23 22:26:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2023-11-23 22:26:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2023-11-23 22:26:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2023-11-23 22:26:48,387 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 140 transitions. [2023-11-23 22:26:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:26:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:26:48,388 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 22:26:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:48,474 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-11-23 22:26:48,474 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 57 transitions. [2023-11-23 22:26:48,476 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:48,480 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 41 states and 53 transitions. [2023-11-23 22:26:48,480 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2023-11-23 22:26:48,483 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2023-11-23 22:26:48,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 53 transitions. [2023-11-23 22:26:48,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:48,483 INFO L218 hiAutomatonCegarLoop]: Abstraction has 41 states and 53 transitions. [2023-11-23 22:26:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 53 transitions. [2023-11-23 22:26:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-23 22:26:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 22:26:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-23 22:26:48,495 INFO L240 hiAutomatonCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-23 22:26:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:26:48,496 INFO L428 stractBuchiCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-23 22:26:48,496 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-23 22:26:48,497 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 38 states and 47 transitions. [2023-11-23 22:26:48,498 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:26:48,498 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:48,498 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:48,501 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:48,501 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 22:26:48,501 INFO L748 eck$LassoCheckResult]: Stem: 963#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 964#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 953#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 968#$Ultimate##0 ~n := #in~n; 971#L19 assume !(~n < 1); 967#L21 assume !(1 == ~n); 955#L24 call #t~ret4 := fibonacci(~n - 1);< 960#$Ultimate##0 ~n := #in~n; 973#L19 assume !(~n < 1); 988#L21 assume !(1 == ~n); 954#L24 call #t~ret4 := fibonacci(~n - 1);< 960#$Ultimate##0 ~n := #in~n; 974#L19 assume !(~n < 1); 965#L21 assume 1 == ~n;#res := 1; 966#fibonacciFINAL assume true; 986#fibonacciEXIT >#31#return; 983#L24-1 call #t~ret5 := fibonacci(~n - 2);< 984#$Ultimate##0 ~n := #in~n; 987#L19 assume ~n < 1;#res := 0; 985#fibonacciFINAL assume true; 982#fibonacciEXIT >#33#return; 981#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 980#fibonacciFINAL assume true; 979#fibonacciEXIT >#31#return; 957#L24-1 [2023-11-23 22:26:48,501 INFO L750 eck$LassoCheckResult]: Loop: 957#L24-1 call #t~ret5 := fibonacci(~n - 2);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume !(1 == ~n); 956#L24 call #t~ret4 := fibonacci(~n - 1);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume !(1 == ~n); 956#L24 call #t~ret4 := fibonacci(~n - 1);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume 1 == ~n;#res := 1; 977#fibonacciFINAL assume true; 989#fibonacciEXIT >#31#return; 962#L24-1 call #t~ret5 := fibonacci(~n - 2);< 972#$Ultimate##0 ~n := #in~n; 969#L19 assume ~n < 1;#res := 0; 970#fibonacciFINAL assume true; 961#fibonacciEXIT >#33#return; 952#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 958#fibonacciFINAL assume true; 975#fibonacciEXIT >#31#return; 957#L24-1 [2023-11-23 22:26:48,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash 62997961, now seen corresponding path program 2 times [2023-11-23 22:26:48,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524968232] [2023-11-23 22:26:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:48,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:48,527 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:48,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 2 times [2023-11-23 22:26:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635405932] [2023-11-23 22:26:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:48,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:48,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:48,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 969547889, now seen corresponding path program 3 times [2023-11-23 22:26:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477912740] [2023-11-23 22:26:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:26:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-23 22:26:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 22:26:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:48,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477912740] [2023-11-23 22:26:48,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477912740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:26:48,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832572787] [2023-11-23 22:26:48,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:26:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:48,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:48,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 22:26:48,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 22:26:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:26:48,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:26:48,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 22:26:48,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:26:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 22:26:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832572787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:26:49,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:26:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2023-11-23 22:26:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795175780] [2023-11-23 22:26:49,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:26:49,807 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:49,808 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:49,808 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:49,808 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:49,808 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:26:49,808 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:49,808 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:49,808 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:49,809 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration4_Loop [2023-11-23 22:26:49,809 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:49,809 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:49,812 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:49,825 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:49,827 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:49,831 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:49,907 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:49,908 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:26:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:49,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:49,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:49,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:49,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-23 22:26:49,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:49,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:49,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:49,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-23 22:26:49,969 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:26:49,970 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:50,341 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:26:50,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:50,346 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:50,346 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:50,346 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:50,346 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:50,346 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:26:50,346 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:50,346 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:50,347 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:50,347 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration4_Loop [2023-11-23 22:26:50,347 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:50,347 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:50,348 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:50,363 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:50,367 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:50,370 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:50,451 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:50,452 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:26:50,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:50,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:50,457 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 [2023-11-23 22:26:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-23 22:26:50,471 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:50,471 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:50,471 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:50,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:50,472 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:50,473 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:50,473 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:50,484 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:26:50,488 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:26:50,488 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:26:50,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:50,496 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:50,499 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:26:50,499 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:26:50,499 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:26:50,499 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:26:50,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-23 22:26:50,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:50,524 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:26:50,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:50,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:26:50,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:50,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:26:50,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:26:50,968 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-23 22:26:50,969 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:51,084 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 45 states and 54 transitions. Complement of second has 11 states. [2023-11-23 22:26:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2023-11-23 22:26:51,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-23 22:26:51,089 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:51,089 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:26:51,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:51,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:26:51,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:51,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:51,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:26:51,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:26:51,589 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-23 22:26:51,589 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:51,702 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 45 states and 54 transitions. Complement of second has 11 states. [2023-11-23 22:26:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2023-11-23 22:26:51,704 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-23 22:26:51,704 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:51,704 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:26:51,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:51,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:26:51,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:52,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:26:52,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:26:52,171 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-23 22:26:52,171 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:52,532 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 344 states and 443 transitions. Complement of second has 125 states. [2023-11-23 22:26:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 22:26:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2023-11-23 22:26:52,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-23 22:26:52,540 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:52,540 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 46 letters. Loop has 22 letters. [2023-11-23 22:26:52,541 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:52,541 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 24 letters. Loop has 44 letters. [2023-11-23 22:26:52,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:52,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 443 transitions. [2023-11-23 22:26:52,566 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:52,581 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 219 states and 296 transitions. [2023-11-23 22:26:52,581 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2023-11-23 22:26:52,582 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 115 [2023-11-23 22:26:52,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 219 states and 296 transitions. [2023-11-23 22:26:52,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:52,583 INFO L218 hiAutomatonCegarLoop]: Abstraction has 219 states and 296 transitions. [2023-11-23 22:26:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states and 296 transitions. [2023-11-23 22:26:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2023-11-23 22:26:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 111 states have internal predecessors, (121), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2023-11-23 22:26:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 222 transitions. [2023-11-23 22:26:52,603 INFO L240 hiAutomatonCegarLoop]: Abstraction has 171 states and 222 transitions. [2023-11-23 22:26:52,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:26:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:26:52,605 INFO L87 Difference]: Start difference. First operand 171 states and 222 transitions. Second operand has 21 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 states have internal predecessors, (49), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-23 22:26:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:52,967 INFO L93 Difference]: Finished difference Result 348 states and 502 transitions. [2023-11-23 22:26:52,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 348 states and 502 transitions. [2023-11-23 22:26:52,976 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:53,011 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 348 states to 338 states and 489 transitions. [2023-11-23 22:26:53,011 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 172 [2023-11-23 22:26:53,013 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2023-11-23 22:26:53,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 338 states and 489 transitions. [2023-11-23 22:26:53,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:53,013 INFO L218 hiAutomatonCegarLoop]: Abstraction has 338 states and 489 transitions. [2023-11-23 22:26:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states and 489 transitions. [2023-11-23 22:26:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 273. [2023-11-23 22:26:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 170 states have (on average 1.1294117647058823) internal successors, (192), 173 states have internal predecessors, (192), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2023-11-23 22:26:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 400 transitions. [2023-11-23 22:26:53,054 INFO L240 hiAutomatonCegarLoop]: Abstraction has 273 states and 400 transitions. [2023-11-23 22:26:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:26:53,061 INFO L428 stractBuchiCegarLoop]: Abstraction has 273 states and 400 transitions. [2023-11-23 22:26:53,063 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-23 22:26:53,063 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 273 states and 400 transitions. [2023-11-23 22:26:53,066 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:53,067 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:53,067 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:53,069 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 11, 9, 8, 8, 5, 5, 4, 4, 3, 2, 1, 1, 1] [2023-11-23 22:26:53,070 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:26:53,071 INFO L748 eck$LassoCheckResult]: Stem: 2939#$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(14, 2);call #Ultimate.allocInit(12, 3); 2940#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 2947#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 2948#$Ultimate##0 ~n := #in~n; 2994#L19 assume !(~n < 1); 2992#L21 assume !(1 == ~n); 2985#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2995#L19 assume !(~n < 1); 3058#L21 assume 1 == ~n;#res := 1; 3054#fibonacciFINAL assume true; 3040#fibonacciEXIT >#31#return; 3036#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3037#$Ultimate##0 ~n := #in~n; 3053#L19 assume ~n < 1;#res := 0; 3039#fibonacciFINAL assume true; 3035#fibonacciEXIT >#33#return; 3032#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3031#fibonacciFINAL assume true; 3030#fibonacciEXIT >#31#return; 3024#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3027#$Ultimate##0 ~n := #in~n; 3096#L19 assume !(~n < 1); 3084#L21 assume 1 == ~n;#res := 1; 3081#fibonacciFINAL assume true; 3023#fibonacciEXIT >#33#return; 3017#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3015#fibonacciFINAL assume true; 3000#fibonacciEXIT >#31#return; 2997#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3001#$Ultimate##0 ~n := #in~n; 3088#L19 assume !(~n < 1); 3086#L21 assume !(1 == ~n); 3087#L24 call #t~ret4 := fibonacci(~n - 1);< 3191#$Ultimate##0 ~n := #in~n; 3146#L19 assume !(~n < 1); 3147#L21 assume 1 == ~n;#res := 1; 3192#fibonacciFINAL assume true; 3189#fibonacciEXIT >#31#return; 3019#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3022#$Ultimate##0 ~n := #in~n; 3095#L19 assume ~n < 1;#res := 0; 3080#fibonacciFINAL assume true; 3018#fibonacciEXIT >#33#return; 3021#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3013#fibonacciFINAL assume true; 2996#fibonacciEXIT >#33#return; 2986#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2989#fibonacciFINAL assume true; 2983#fibonacciEXIT >#31#return; 2979#L24-1 call #t~ret5 := fibonacci(~n - 2);< 2978#$Ultimate##0 ~n := #in~n; 3089#L19 assume !(~n < 1); 3085#L21 assume !(1 == ~n); 2951#L24 call #t~ret4 := fibonacci(~n - 1);< 3190#$Ultimate##0 ~n := #in~n; 2949#L19 assume !(~n < 1); 2952#L21 assume !(1 == ~n); 3157#L24 call #t~ret4 := fibonacci(~n - 1);< 3159#$Ultimate##0 [2023-11-23 22:26:53,071 INFO L750 eck$LassoCheckResult]: Loop: 3159#$Ultimate##0 ~n := #in~n; 3169#L19 assume !(~n < 1); 3166#L21 assume !(1 == ~n); 3158#L24 call #t~ret4 := fibonacci(~n - 1);< 3159#$Ultimate##0 [2023-11-23 22:26:53,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -427722619, now seen corresponding path program 4 times [2023-11-23 22:26:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770981311] [2023-11-23 22:26:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:53,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:53,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:53,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 2 times [2023-11-23 22:26:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682580741] [2023-11-23 22:26:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:53,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:53,133 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:53,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1616363039, now seen corresponding path program 5 times [2023-11-23 22:26:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:53,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48483607] [2023-11-23 22:26:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 22:26:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:26:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:26:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 22:26:53,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:53,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48483607] [2023-11-23 22:26:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48483607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:26:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603543165] [2023-11-23 22:26:53,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:26:53,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:53,694 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:53,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 22:26:53,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-23 22:26:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:26:53,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:26:53,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 22:26:53,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:26:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 130 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 22:26:54,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603543165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:26:54,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:26:54,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 20 [2023-11-23 22:26:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618917146] [2023-11-23 22:26:54,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:26:54,569 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:54,569 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:54,569 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:54,569 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:54,569 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:26:54,570 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,570 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:54,570 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:54,570 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration5_Loop [2023-11-23 22:26:54,570 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:54,570 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:54,572 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,574 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,576 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,582 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,585 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,617 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:54,617 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:26:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,629 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:54,629 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-23 22:26:54,653 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:26:54,653 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:26:54,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:54,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:54,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-23 22:26:54,733 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:26:54,733 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:26:54,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:54,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,761 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:26:54,762 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:54,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-23 22:26:54,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,844 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:26:54,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:26:54,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-23 22:26:54,882 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:26:54,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:54,885 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:26:54,885 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:26:54,885 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:26:54,886 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:26:54,886 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:26:54,886 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,886 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:26:54,886 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:26:54,886 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration5_Loop [2023-11-23 22:26:54,886 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:26:54,886 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:26:54,887 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,898 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,901 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,908 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,911 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:26:54,958 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:26:54,959 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:26:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,960 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,964 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 [2023-11-23 22:26:54,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-23 22:26:54,977 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:54,977 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:54,977 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:54,977 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:54,977 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:54,978 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:54,978 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:54,992 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:55,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:55,016 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:55,018 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 [2023-11-23 22:26:55,030 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:55,031 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:55,031 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:55,031 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:55,031 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:55,032 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:55,032 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:55,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-23 22:26:55,044 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:26:55,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:55,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:55,064 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:55,069 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 [2023-11-23 22:26:55,081 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:26:55,081 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:26:55,081 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:26:55,081 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:26:55,081 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:26:55,082 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:26:55,082 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:26:55,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-23 22:26:55,094 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:26:55,109 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-23 22:26:55,109 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-23 22:26:55,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:26:55,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:55,113 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:55,114 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:26:55,115 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:26:55,115 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:26:55,115 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-23 22:26:55,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-23 22:26:55,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:55,140 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:26:55,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:55,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:26:55,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:55,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:55,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:26:55,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:26:55,928 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-23 22:26:55,928 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:55,999 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 295 states and 426 transitions. Complement of second has 13 states. [2023-11-23 22:26:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2023-11-23 22:26:56,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-23 22:26:56,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:56,003 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:26:56,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:56,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:26:56,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:56,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:26:56,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:26:56,738 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-23 22:26:56,739 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:56,808 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 295 states and 426 transitions. Complement of second has 13 states. [2023-11-23 22:26:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2023-11-23 22:26:56,811 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-23 22:26:56,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:56,813 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:26:56,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:56,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:26:56,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:57,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:26:57,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:26:57,581 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-23 22:26:57,581 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:57,670 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 348 states and 483 transitions. Complement of second has 14 states. [2023-11-23 22:26:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-23 22:26:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:26:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2023-11-23 22:26:57,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-23 22:26:57,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:57,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 79 letters. Loop has 4 letters. [2023-11-23 22:26:57,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:57,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 75 letters. Loop has 8 letters. [2023-11-23 22:26:57,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:26:57,674 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 348 states and 483 transitions. [2023-11-23 22:26:57,680 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:57,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 348 states to 287 states and 416 transitions. [2023-11-23 22:26:57,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 137 [2023-11-23 22:26:57,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2023-11-23 22:26:57,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 287 states and 416 transitions. [2023-11-23 22:26:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:57,686 INFO L218 hiAutomatonCegarLoop]: Abstraction has 287 states and 416 transitions. [2023-11-23 22:26:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states and 416 transitions. [2023-11-23 22:26:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 279. [2023-11-23 22:26:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 175 states have (on average 1.1257142857142857) internal successors, (197), 178 states have internal predecessors, (197), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2023-11-23 22:26:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 408 transitions. [2023-11-23 22:26:57,721 INFO L240 hiAutomatonCegarLoop]: Abstraction has 279 states and 408 transitions. [2023-11-23 22:26:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:26:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:26:57,723 INFO L87 Difference]: Start difference. First operand 279 states and 408 transitions. Second operand has 20 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 16 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2023-11-23 22:26:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:57,911 INFO L93 Difference]: Finished difference Result 495 states and 760 transitions. [2023-11-23 22:26:57,911 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 760 transitions. [2023-11-23 22:26:57,920 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:57,930 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 490 states and 753 transitions. [2023-11-23 22:26:57,930 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 255 [2023-11-23 22:26:57,931 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 262 [2023-11-23 22:26:57,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 490 states and 753 transitions. [2023-11-23 22:26:57,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:26:57,937 INFO L218 hiAutomatonCegarLoop]: Abstraction has 490 states and 753 transitions. [2023-11-23 22:26:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states and 753 transitions. [2023-11-23 22:26:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 370. [2023-11-23 22:26:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 231 states have (on average 1.147186147186147) internal successors, (265), 232 states have internal predecessors, (265), 83 states have call successors, (99), 49 states have call predecessors, (99), 56 states have return successors, (218), 88 states have call predecessors, (218), 81 states have call successors, (218) [2023-11-23 22:26:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 582 transitions. [2023-11-23 22:26:57,960 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-23 22:26:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:26:57,963 INFO L428 stractBuchiCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-23 22:26:57,963 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-23 22:26:57,963 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 370 states and 582 transitions. [2023-11-23 22:26:57,982 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:26:57,983 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:26:57,983 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:26:57,990 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [19, 16, 15, 11, 10, 8, 8, 7, 7, 5, 3, 1, 1, 1] [2023-11-23 22:26:57,991 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:26:57,993 INFO L748 eck$LassoCheckResult]: Stem: 6350#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 6351#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 6358#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 6359#$Ultimate##0 ~n := #in~n; 6442#L19 assume !(~n < 1); 6440#L21 assume !(1 == ~n); 6401#L24 call #t~ret4 := fibonacci(~n - 1);< 6438#$Ultimate##0 ~n := #in~n; 6433#L19 assume !(~n < 1); 6423#L21 assume !(1 == ~n); 6402#L24 call #t~ret4 := fibonacci(~n - 1);< 6407#$Ultimate##0 ~n := #in~n; 6483#L19 assume !(~n < 1); 6481#L21 assume !(1 == ~n); 6403#L24 call #t~ret4 := fibonacci(~n - 1);< 6407#$Ultimate##0 ~n := #in~n; 6483#L19 assume !(~n < 1); 6481#L21 assume !(1 == ~n); 6403#L24 call #t~ret4 := fibonacci(~n - 1);< 6407#$Ultimate##0 ~n := #in~n; 6483#L19 assume !(~n < 1); 6481#L21 assume !(1 == ~n); 6403#L24 call #t~ret4 := fibonacci(~n - 1);< 6407#$Ultimate##0 ~n := #in~n; 6485#L19 assume !(~n < 1); 6563#L21 assume 1 == ~n;#res := 1; 6562#fibonacciFINAL assume true; 6560#fibonacciEXIT >#31#return; 6556#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6557#$Ultimate##0 ~n := #in~n; 6561#L19 assume ~n < 1;#res := 0; 6559#fibonacciFINAL assume true; 6555#fibonacciEXIT >#33#return; 6549#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6519#fibonacciFINAL assume true; 6515#fibonacciEXIT >#31#return; 6374#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6448#$Ultimate##0 ~n := #in~n; 6514#L19 assume !(~n < 1); 6496#L21 assume 1 == ~n;#res := 1; 6382#fibonacciFINAL assume true; 6445#fibonacciEXIT >#33#return; 6444#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6443#fibonacciFINAL assume true; 6421#fibonacciEXIT >#31#return; 6375#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6416#$Ultimate##0 ~n := #in~n; 6498#L19 assume !(~n < 1); 6497#L21 assume !(1 == ~n); 6435#L24 call #t~ret4 := fibonacci(~n - 1);< 6617#$Ultimate##0 ~n := #in~n; 6615#L19 assume !(~n < 1); 6441#L21 assume 1 == ~n;#res := 1; 6439#fibonacciFINAL assume true; 6434#fibonacciEXIT >#31#return; 6427#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6432#$Ultimate##0 ~n := #in~n; 6452#L19 assume ~n < 1;#res := 0; 6450#fibonacciFINAL assume true; 6424#fibonacciEXIT >#33#return; 6422#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6419#fibonacciFINAL assume true; 6413#fibonacciEXIT >#33#return; 6411#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6409#fibonacciFINAL assume true; 6405#fibonacciEXIT >#31#return; 6372#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6388#$Ultimate##0 ~n := #in~n; 6389#L19 assume !(~n < 1); 6381#L21 assume !(1 == ~n); 6383#L24 call #t~ret4 := fibonacci(~n - 1);< 6571#$Ultimate##0 ~n := #in~n; 6576#L19 assume !(~n < 1); 6574#L21 assume !(1 == ~n); 6530#L24 call #t~ret4 := fibonacci(~n - 1);< 6534#$Ultimate##0 ~n := #in~n; 6537#L19 assume !(~n < 1); 6535#L21 assume 1 == ~n;#res := 1; 6533#fibonacciFINAL assume true; 6529#fibonacciEXIT >#31#return; 6523#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6527#$Ultimate##0 ~n := #in~n; 6532#L19 assume ~n < 1;#res := 0; 6528#fibonacciFINAL assume true; 6520#fibonacciEXIT >#33#return; 6525#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6572#fibonacciFINAL assume true; 6569#fibonacciEXIT >#31#return; 6447#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6449#$Ultimate##0 ~n := #in~n; 6507#L19 assume !(~n < 1); 6453#L21 assume 1 == ~n;#res := 1; 6451#fibonacciFINAL assume true; 6446#fibonacciEXIT >#33#return; 6444#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6443#fibonacciFINAL assume true; 6421#fibonacciEXIT >#33#return; 6406#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6499#fibonacciFINAL assume true; 6412#fibonacciEXIT >#31#return; 6390#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6391#$Ultimate##0 ~n := #in~n; 6400#L19 assume !(~n < 1); 6397#L21 assume !(1 == ~n); 6330#L24 call #t~ret4 := fibonacci(~n - 1);< 6623#$Ultimate##0 ~n := #in~n; 6624#L19 assume !(~n < 1); 6694#L21 assume !(1 == ~n); 6342#L24 call #t~ret4 := fibonacci(~n - 1);< 6343#$Ultimate##0 ~n := #in~n; 6378#L19 assume !(~n < 1); 6649#L21 assume !(1 == ~n); 6353#L24 [2023-11-23 22:26:57,993 INFO L750 eck$LassoCheckResult]: Loop: 6353#L24 call #t~ret4 := fibonacci(~n - 1);< 6343#$Ultimate##0 ~n := #in~n; 6378#L19 assume !(~n < 1); 6649#L21 assume !(1 == ~n); 6353#L24 [2023-11-23 22:26:57,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:57,994 INFO L85 PathProgramCache]: Analyzing trace with hash -315610179, now seen corresponding path program 6 times [2023-11-23 22:26:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:57,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138846285] [2023-11-23 22:26:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:58,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:58,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:58,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 3 times [2023-11-23 22:26:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:58,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530721798] [2023-11-23 22:26:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:58,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:26:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:26:58,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:26:58,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1033349347, now seen corresponding path program 7 times [2023-11-23 22:26:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428057324] [2023-11-23 22:26:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:26:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:26:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:26:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 22:26:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:26:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:26:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:26:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-23 22:26:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428057324] [2023-11-23 22:26:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428057324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:26:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057350589] [2023-11-23 22:26:58,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:26:58,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:58,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:58,715 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:58,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-23 22:26:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:58,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 22:26:58,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-23 22:26:58,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 294 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-23 22:27:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057350589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:00,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:00,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17] total 23 [2023-11-23 22:27:00,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71357491] [2023-11-23 22:27:00,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:00,082 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:27:00,082 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:27:00,082 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:27:00,082 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:27:00,082 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:27:00,083 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,083 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:27:00,083 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:27:00,083 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration6_Loop [2023-11-23 22:27:00,083 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:27:00,083 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:27:00,084 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:00,087 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:00,089 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:00,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:00,145 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:27:00,145 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:27:00,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:00,146 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:00,150 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:27:00,150 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:27:00,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-23 22:27:00,172 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:27:00,172 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:27:00,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:00,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:00,193 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:00,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:27:00,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:27:00,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-23 22:27:00,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:27:00,218 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:27:00,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2023-11-23 22:27:00,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:00,233 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:00,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-23 22:27:00,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:27:00,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:27:00,248 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:27:00,249 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:27:00,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:00,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:00,267 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:00,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-23 22:27:00,269 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:27:00,269 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:27:00,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:00,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:00,302 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:00,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-23 22:27:00,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:27:00,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:27:02,236 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:27:02,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:02,240 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:27:02,241 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:27:02,241 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:27:02,241 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:27:02,241 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:27:02,241 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,241 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:27:02,241 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:27:02,241 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration6_Loop [2023-11-23 22:27:02,241 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:27:02,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:27:02,242 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:02,244 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:02,246 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:02,250 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:27:02,296 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:27:02,296 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:27:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:02,297 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:02,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-23 22:27:02,305 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 [2023-11-23 22:27:02,315 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:27:02,315 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:27:02,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:27:02,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:27:02,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:27:02,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:27:02,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:27:02,317 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:27:02,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2023-11-23 22:27:02,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:02,330 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-23 22:27:02,332 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 [2023-11-23 22:27:02,348 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:27:02,349 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:27:02,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:27:02,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:27:02,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:27:02,349 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:27:02,350 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:27:02,364 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:27:02,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2023-11-23 22:27:02,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:02,379 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-23 22:27:02,381 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 [2023-11-23 22:27:02,391 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:27:02,391 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:27:02,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:27:02,391 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:27:02,391 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:27:02,392 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:27:02,392 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:27:02,393 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:27:02,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2023-11-23 22:27:02,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:02,408 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:02,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-23 22:27:02,410 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 [2023-11-23 22:27:02,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:27:02,420 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:27:02,420 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:27:02,420 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:27:02,420 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:27:02,421 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:27:02,421 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:27:02,424 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:27:02,427 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:27:02,427 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:27:02,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:27:02,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:02,429 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:02,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-23 22:27:02,431 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:27:02,431 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:27:02,431 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:27:02,431 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:27:02,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:02,449 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:27:02,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:02,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:02,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:27:02,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:03,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:27:03,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:03,585 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2023-11-23 22:27:03,585 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:03,657 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 379 states and 592 transitions. Complement of second has 18 states. [2023-11-23 22:27:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-23 22:27:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2023-11-23 22:27:03,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-23 22:27:03,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:27:03,659 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:27:03,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:03,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:27:03,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:04,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:27:04,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:04,756 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2023-11-23 22:27:04,756 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:04,863 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 385 states and 598 transitions. Complement of second has 17 states. [2023-11-23 22:27:04,864 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 [2023-11-23 22:27:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2023-11-23 22:27:04,865 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-23 22:27:04,865 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:27:04,866 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:27:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:04,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:27:04,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:05,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:27:05,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:06,009 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 4 loop predicates [2023-11-23 22:27:06,009 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:06,098 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 450 states and 690 transitions. Complement of second has 27 states. [2023-11-23 22:27:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-23 22:27:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:27:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2023-11-23 22:27:06,102 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-23 22:27:06,102 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:27:06,102 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 116 letters. Loop has 4 letters. [2023-11-23 22:27:06,103 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:27:06,103 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 112 letters. Loop has 8 letters. [2023-11-23 22:27:06,103 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:27:06,104 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 450 states and 690 transitions. [2023-11-23 22:27:06,132 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:27:06,138 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 450 states to 370 states and 582 transitions. [2023-11-23 22:27:06,139 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 160 [2023-11-23 22:27:06,139 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 182 [2023-11-23 22:27:06,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 370 states and 582 transitions. [2023-11-23 22:27:06,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:27:06,142 INFO L218 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-23 22:27:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states and 582 transitions. [2023-11-23 22:27:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-23 22:27:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 231 states have (on average 1.147186147186147) internal successors, (265), 232 states have internal predecessors, (265), 83 states have call successors, (99), 49 states have call predecessors, (99), 56 states have return successors, (218), 88 states have call predecessors, (218), 81 states have call successors, (218) [2023-11-23 22:27:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 582 transitions. [2023-11-23 22:27:06,159 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-23 22:27:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:27:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:27:06,161 INFO L87 Difference]: Start difference. First operand 370 states and 582 transitions. Second operand has 24 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 19 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (23), 10 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-23 22:27:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:06,406 INFO L93 Difference]: Finished difference Result 554 states and 872 transitions. [2023-11-23 22:27:06,406 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 554 states and 872 transitions. [2023-11-23 22:27:06,416 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-23 22:27:06,416 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 554 states to 0 states and 0 transitions. [2023-11-23 22:27:06,417 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-23 22:27:06,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-23 22:27:06,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-23 22:27:06,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:06,417 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:27:06,417 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:27:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:27:06,418 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:27:06,418 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-23 22:27:06,419 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-23 22:27:06,419 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-23 22:27:06,419 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-23 22:27:06,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 10:27:06 BoogieIcfgContainer [2023-11-23 22:27:06,426 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-23 22:27:06,427 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 22:27:06,427 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 22:27:06,427 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 22:27:06,428 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:43" (3/4) ... [2023-11-23 22:27:06,430 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 22:27:06,431 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 22:27:06,432 INFO L158 Benchmark]: Toolchain (without parser) took 23777.56ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 120.8MB in the beginning and 209.6MB in the end (delta: -88.9MB). Peak memory consumption was 29.6MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,432 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:27:06,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.30ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 110.4MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,433 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.33ms. Allocated memory is still 157.3MB. Free memory was 110.4MB in the beginning and 108.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,433 INFO L158 Benchmark]: Boogie Preprocessor took 33.85ms. Allocated memory is still 157.3MB. Free memory was 108.9MB in the beginning and 107.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,433 INFO L158 Benchmark]: RCFGBuilder took 310.29ms. Allocated memory is still 157.3MB. Free memory was 107.4MB in the beginning and 98.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,434 INFO L158 Benchmark]: BuchiAutomizer took 23116.08ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 98.0MB in the beginning and 209.6MB in the end (delta: -111.6MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2023-11-23 22:27:06,434 INFO L158 Benchmark]: Witness Printer took 4.13ms. Allocated memory is still 272.6MB. Free memory is still 209.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:27:06,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.30ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 110.4MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.33ms. Allocated memory is still 157.3MB. Free memory was 110.4MB in the beginning and 108.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.85ms. Allocated memory is still 157.3MB. Free memory was 108.9MB in the beginning and 107.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.29ms. Allocated memory is still 157.3MB. Free memory was 107.4MB in the beginning and 98.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 23116.08ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 98.0MB in the beginning and 209.6MB in the end (delta: -111.6MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Witness Printer took 4.13ms. Allocated memory is still 272.6MB. Free memory is still 209.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 23.0s and 7 iterations. TraceHistogramMax:19. Analysis of lassos took 12.2s. Construction of modules took 0.9s. Büchi inclusion checks took 9.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 271 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 547 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 500 mSDsluCounter, 454 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 267 mSDsCounter, 393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 843 IncrementalHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 393 mSolverCounterUnsat, 187 mSDtfsCounter, 843 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT4 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf100 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq175 hnf95 smp64 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 52ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.3s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-23 22:27:06,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-23 22:27:06,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-23 22:27:06,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:07,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 22:27:07,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4c4a9d-3c9d-4113-b4a7-e6d4a8fc03f9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE