./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl --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 b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:19:54,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:19:54,912 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-12 02:19:54,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:19:54,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:19:54,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:19:54,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:19:54,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:19:54,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:19:54,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:19:54,966 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:19:54,967 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-12 02:19:54,967 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-12 02:19:54,969 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-12 02:19:54,970 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-12 02:19:54,970 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-12 02:19:54,970 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-12 02:19:54,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:19:54,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-12 02:19:54,972 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:19:54,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:19:54,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:19:54,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:19:54,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-12 02:19:54,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-12 02:19:54,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-12 02:19:54,975 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:19:54,976 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:19:54,976 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:19:54,976 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-12 02:19:54,978 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:19:54,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:19:54,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:19:54,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:19:54,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:19:54,979 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-12 02:19:54,980 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_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2023-11-12 02:19:55,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:19:55,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:19:55,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:19:55,321 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:19:55,323 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:19:55,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/recursive/Fibonacci02.c [2023-11-12 02:19:58,402 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:19:58,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:19:58,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/sv-benchmarks/c/recursive/Fibonacci02.c [2023-11-12 02:19:58,630 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/data/0c4abba61/2a30d9012fb84ea3b5c9fad858227eee/FLAG029646ece [2023-11-12 02:19:58,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/data/0c4abba61/2a30d9012fb84ea3b5c9fad858227eee [2023-11-12 02:19:58,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:19:58,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:19:58,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:19:58,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:19:58,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:19:58,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1491d533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58, skipping insertion in model container [2023-11-12 02:19:58,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,677 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:19:58,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:19:58,849 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:19:58,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:19:58,880 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:19:58,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58 WrapperNode [2023-11-12 02:19:58,880 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:19:58,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:19:58,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:19:58,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:19:58,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,913 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-12 02:19:58,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:19:58,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:19:58,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:19:58,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:19:58,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:19:58,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:19:58,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:19:58,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:19:58,932 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (1/1) ... [2023-11-12 02:19:58,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:58,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:58,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:19:58,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-12 02:19:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-12 02:19:59,000 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-12 02:19:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:19:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:19:59,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:19:59,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:19:59,062 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:19:59,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:19:59,159 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:19:59,164 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:19:59,165 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:19:59,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:59 BoogieIcfgContainer [2023-11-12 02:19:59,167 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:19:59,168 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-12 02:19:59,168 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-12 02:19:59,172 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-12 02:19:59,173 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:19:59,174 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 12.11 02:19:58" (1/3) ... [2023-11-12 02:19:59,175 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ee08353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:19:59, skipping insertion in model container [2023-11-12 02:19:59,175 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:19:59,175 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:58" (2/3) ... [2023-11-12 02:19:59,176 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ee08353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:19:59, skipping insertion in model container [2023-11-12 02:19:59,176 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:19:59,176 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:59" (3/3) ... [2023-11-12 02:19:59,177 INFO L332 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2023-11-12 02:19:59,236 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-12 02:19:59,236 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-12 02:19:59,237 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-12 02:19:59,237 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-12 02:19:59,237 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-12 02:19:59,237 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-12 02:19:59,237 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-12 02:19:59,238 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-12 02:19:59,241 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) [2023-11-12 02:19:59,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:19:59,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:19:59,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:19:59,265 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:19:59,266 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-12 02:19:59,266 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-12 02:19:59,266 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) [2023-11-12 02:19:59,269 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:19:59,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:19:59,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:19:59,270 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:19:59,270 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-12 02:19:59,275 INFO L748 eck$LassoCheckResult]: Stem: 17#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 8#L29true call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 14#$Ultimate##0true [2023-11-12 02:19:59,276 INFO L750 eck$LassoCheckResult]: Loop: 14#$Ultimate##0true ~n := #in~n; 4#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 16#L22true call #t~ret4 := fibonacci(~n - 1);< 14#$Ultimate##0true [2023-11-12 02:19:59,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2023-11-12 02:19:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021613307] [2023-11-12 02:19:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:19:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:19:59,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2023-11-12 02:19:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299419266] [2023-11-12 02:19:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:19:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:19:59,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2023-11-12 02:19:59,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:59,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562673562] [2023-11-12 02:19:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:19:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:19:59,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:19:59,738 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:19:59,738 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:19:59,738 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:19:59,739 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:19:59,739 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:19:59,739 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:59,739 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:19:59,739 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:19:59,740 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2023-11-12 02:19:59,740 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:19:59,740 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:19:59,757 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:19:59,769 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:19:59,772 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:19:59,775 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:19:59,787 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:19:59,852 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:19:59,853 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:19:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:59,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:19:59,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:19:59,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:19:59,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-12 02:19:59,899 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:19:59,900 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:19:59,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:59,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:19:59,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-12 02:19:59,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:19:59,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:19:59,940 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:19:59,940 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:19:59,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:59,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:19:59,957 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:19:59,958 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:19:59,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-12 02:19:59,984 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:19:59,984 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:19:59,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:19:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:59,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-12 02:20:00,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:00,007 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:00,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-12 02:20:00,045 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:20:00,045 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:00,130 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:20:00,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2023-11-12 02:20:00,138 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:20:00,138 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:20:00,138 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:20:00,138 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:20:00,139 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:20:00,139 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,139 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:20:00,139 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:20:00,139 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2023-11-12 02:20:00,139 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:20:00,139 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:20:00,141 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:00,149 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:00,154 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:00,160 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:00,173 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:00,229 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:20:00,234 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:20:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,251 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 [2023-11-12 02:20:00,264 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:00,264 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-12 02:20:00,265 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:00,265 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:00,265 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:00,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:00,270 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:00,293 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:00,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,307 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,315 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 [2023-11-12 02:20:00,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:00,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:00,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:00,329 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:00,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:00,330 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:00,330 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:00,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-12 02:20:00,353 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:00,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:00,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,371 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 [2023-11-12 02:20:00,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-12 02:20:00,385 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:00,385 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:00,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:00,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:00,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:00,386 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:00,386 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:00,396 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:00,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-11-12 02:20:00,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-12 02:20:00,408 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 [2023-11-12 02:20:00,418 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:00,418 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:00,419 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:00,419 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:00,419 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:00,420 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:00,420 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:00,430 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:20:00,434 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-12 02:20:00,435 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-12 02:20:00,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:00,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:00,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-12 02:20:00,463 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:20:00,463 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:20:00,463 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:20:00,464 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-12 02:20:00,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:00,471 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:20:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:00,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:20:00,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:00,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:20:00,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:00,690 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 [2023-11-12 02:20:00,698 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) [2023-11-12 02:20:00,851 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. [2023-11-12 02:20:00,854 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 [2023-11-12 02:20:00,858 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) [2023-11-12 02:20:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2023-11-12 02:20:00,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2023-11-12 02:20:00,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:00,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2023-11-12 02:20:00,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:00,863 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-12 02:20:00,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:00,864 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2023-11-12 02:20:00,869 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:20:00,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2023-11-12 02:20:00,876 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-12 02:20:00,877 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-11-12 02:20:00,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2023-11-12 02:20:00,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:00,878 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-12 02:20:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2023-11-12 02:20:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-12 02:20:00,909 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) [2023-11-12 02:20:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-12 02:20:00,913 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-12 02:20:00,914 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-12 02:20:00,914 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-12 02:20:00,914 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2023-11-12 02:20:00,917 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:20:00,917 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:20:00,917 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:20:00,919 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:00,919 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:00,920 INFO L748 eck$LassoCheckResult]: Stem: 133#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 134#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 123#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 135#$Ultimate##0 ~n := #in~n; 129#L17 assume !(~n < 1); 130#L19 assume !(1 == ~n); 122#L22 call #t~ret4 := fibonacci(~n - 1);< 131#$Ultimate##0 ~n := #in~n; 126#L17 assume ~n < 1;#res := 0; 127#fibonacciFINAL assume true; 132#fibonacciEXIT >#31#return; 121#L22-1 [2023-11-12 02:20:00,920 INFO L750 eck$LassoCheckResult]: Loop: 121#L22-1 call #t~ret5 := fibonacci(~n - 2);< 125#$Ultimate##0 ~n := #in~n; 140#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 124#L22 call #t~ret4 := fibonacci(~n - 1);< 125#$Ultimate##0 ~n := #in~n; 140#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 138#fibonacciEXIT >#31#return; 121#L22-1 [2023-11-12 02:20:00,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2023-11-12 02:20:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486218720] [2023-11-12 02:20:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:20:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486218720] [2023-11-12 02:20:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486218720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:01,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:20:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144800043] [2023-11-12 02:20:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:01,075 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-12 02:20:01,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2023-11-12 02:20:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:01,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523131230] [2023-11-12 02:20:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:20:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523131230] [2023-11-12 02:20:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523131230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:01,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:01,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:20:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173883140] [2023-11-12 02:20:01,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:01,155 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:20:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:20:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:20:01,160 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) [2023-11-12 02:20:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:01,268 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-12 02:20:01,268 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2023-11-12 02:20:01,275 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:20:01,282 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2023-11-12 02:20:01,282 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-11-12 02:20:01,284 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2023-11-12 02:20:01,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2023-11-12 02:20:01,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:01,284 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 02:20:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2023-11-12 02:20:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 02:20:01,289 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) [2023-11-12 02:20:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-12 02:20:01,292 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 02:20:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:20:01,294 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 02:20:01,294 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-12 02:20:01,294 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2023-11-12 02:20:01,297 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-12 02:20:01,297 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:20:01,297 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:20:01,298 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:01,298 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:01,299 INFO L748 eck$LassoCheckResult]: Stem: 207#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 208#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 195#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 209#$Ultimate##0 ~n := #in~n; 202#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 196#L22 call #t~ret4 := fibonacci(~n - 1);< 204#$Ultimate##0 ~n := #in~n; 212#L17 assume !(~n < 1); 217#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#31#return; 194#L22-1 [2023-11-12 02:20:01,299 INFO L750 eck$LassoCheckResult]: Loop: 194#L22-1 call #t~ret5 := fibonacci(~n - 2);< 198#$Ultimate##0 ~n := #in~n; 199#L17 assume !(~n < 1); 201#L19 assume !(1 == ~n); 197#L22 call #t~ret4 := fibonacci(~n - 1);< 198#$Ultimate##0 ~n := #in~n; 199#L17 assume !(~n < 1); 201#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#31#return; 194#L22-1 [2023-11-12 02:20:01,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2023-11-12 02:20:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:01,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721085017] [2023-11-12 02:20:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:20:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:01,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:01,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721085017] [2023-11-12 02:20:01,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721085017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788978022] [2023-11-12 02:20:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:01,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:01,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:01,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:20:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:01,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:20:01,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:01,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788978022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:01,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:01,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-12 02:20:01,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524219914] [2023-11-12 02:20:01,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:01,748 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-12 02:20:01,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 1 times [2023-11-12 02:20:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:01,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271170057] [2023-11-12 02:20:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:01,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:01,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:20:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:01,779 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:20:01,941 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:20:01,941 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:20:01,942 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:20:01,942 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:20:01,942 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:20:01,942 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:01,942 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:20:01,942 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:20:01,942 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2023-11-12 02:20:01,942 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:20:01,942 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:20:01,943 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:01,951 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:01,953 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:01,956 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:01,959 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,006 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:20:02,006 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:20:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:02,009 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:02,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-12 02:20:02,018 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:02,018 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:02,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:02,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:02,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:02,078 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:20:02,078 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:02,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-12 02:20:02,108 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:20:02,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:02,117 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:20:02,117 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:20:02,118 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:20:02,118 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:20:02,118 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:20:02,118 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:02,118 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:20:02,118 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:20:02,118 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2023-11-12 02:20:02,118 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:20:02,118 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:20:02,119 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,128 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,131 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,133 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,137 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:02,186 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:20:02,186 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:20:02,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:02,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:02,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-12 02:20:02,190 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 [2023-11-12 02:20:02,200 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:02,200 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:02,200 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:02,201 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:02,201 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:02,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:02,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:02,211 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:20:02,215 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-12 02:20:02,215 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-12 02:20:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:02,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:02,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-12 02:20:02,222 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:20:02,222 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:20:02,222 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:20:02,222 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-12 02:20:02,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:02,234 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:20:02,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:02,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:20:02,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:02,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:20:02,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:02,466 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-12 02:20:02,466 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:20:02,734 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2023-11-12 02:20:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2023-11-12 02:20:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:20:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2023-11-12 02:20:02,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2023-11-12 02:20:02,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:02,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2023-11-12 02:20:02,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:02,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2023-11-12 02:20:02,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:02,744 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2023-11-12 02:20:02,759 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-12 02:20:02,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2023-11-12 02:20:02,768 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2023-11-12 02:20:02,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2023-11-12 02:20:02,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2023-11-12 02:20:02,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:02,769 INFO L218 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2023-11-12 02:20:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2023-11-12 02:20:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2023-11-12 02:20:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2023-11-12 02:20:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2023-11-12 02:20:02,804 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2023-11-12 02:20:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:20:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:20:02,806 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:20:02,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:02,937 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2023-11-12 02:20:02,937 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2023-11-12 02:20:02,941 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-12 02:20:02,945 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2023-11-12 02:20:02,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2023-11-12 02:20:02,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2023-11-12 02:20:02,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2023-11-12 02:20:02,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:02,947 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2023-11-12 02:20:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2023-11-12 02:20:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2023-11-12 02:20:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2023-11-12 02:20:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-11-12 02:20:02,959 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-12 02:20:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:20:02,960 INFO L428 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-12 02:20:02,960 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-12 02:20:02,961 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2023-11-12 02:20:02,963 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-12 02:20:02,963 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:20:02,963 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:20:02,965 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:02,965 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2023-11-12 02:20:02,965 INFO L748 eck$LassoCheckResult]: Stem: 808#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 809#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 810#$Ultimate##0 ~n := #in~n; 853#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 798#L22 call #t~ret4 := fibonacci(~n - 1);< 802#$Ultimate##0 ~n := #in~n; 797#L17 assume !(~n < 1); 799#L19 assume !(1 == ~n); 819#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 848#L17 assume !(~n < 1); 847#L19 assume !(1 == ~n); 840#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 848#L17 assume !(~n < 1); 847#L19 assume !(1 == ~n); 840#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 849#L17 assume !(~n < 1); 851#L19 assume 1 == ~n;#res := 1; 850#fibonacciFINAL assume true; 844#fibonacciEXIT >#31#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 841#$Ultimate##0 ~n := #in~n; 891#L17 assume ~n < 1;#res := 0; 890#fibonacciFINAL assume true; 889#fibonacciEXIT >#33#return; 888#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fibonacciFINAL assume true; 879#fibonacciEXIT >#31#return; 815#L22-1 [2023-11-12 02:20:02,966 INFO L750 eck$LassoCheckResult]: Loop: 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume 1 == ~n;#res := 1; 818#fibonacciFINAL assume true; 875#fibonacciEXIT >#31#return; 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume 1 == ~n;#res := 1; 818#fibonacciFINAL assume true; 875#fibonacciEXIT >#31#return; 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume ~n < 1;#res := 0; 884#fibonacciFINAL assume true; 883#fibonacciEXIT >#33#return; 876#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 882#fibonacciFINAL assume true; 880#fibonacciEXIT >#33#return; 876#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 882#fibonacciFINAL assume true; 880#fibonacciEXIT >#31#return; 815#L22-1 [2023-11-12 02:20:02,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash 3324437, now seen corresponding path program 1 times [2023-11-12 02:20:02,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:02,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481231177] [2023-11-12 02:20:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:02,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-12 02:20:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:20:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:20:03,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:03,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481231177] [2023-11-12 02:20:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481231177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711445826] [2023-11-12 02:20:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:03,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:03,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:03,272 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:03,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:20:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:20:03,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:20:03,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:20:03,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711445826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:03,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:03,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2023-11-12 02:20:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307092446] [2023-11-12 02:20:03,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:03,743 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-12 02:20:03,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash -929430729, now seen corresponding path program 1 times [2023-11-12 02:20:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:03,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918327241] [2023-11-12 02:20:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:03,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:20:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:20:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:20:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 02:20:03,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:03,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918327241] [2023-11-12 02:20:03,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918327241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:03,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269389456] [2023-11-12 02:20:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:03,878 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:03,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:20:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:03,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:20:03,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:20:03,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:20:04,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269389456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:04,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:04,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:20:04,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336664998] [2023-11-12 02:20:04,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:04,179 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:20:04,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:20:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:20:04,180 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 02:20:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:04,616 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2023-11-12 02:20:04,616 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2023-11-12 02:20:04,620 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-12 02:20:04,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2023-11-12 02:20:04,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2023-11-12 02:20:04,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2023-11-12 02:20:04,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2023-11-12 02:20:04,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:04,627 INFO L218 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-12 02:20:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2023-11-12 02:20:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-12 02:20:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 108 states have internal predecessors, (117), 39 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (57), 33 states have call predecessors, (57), 36 states have call successors, (57) [2023-11-12 02:20:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2023-11-12 02:20:04,652 INFO L240 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-12 02:20:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:20:04,655 INFO L428 stractBuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-12 02:20:04,655 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-12 02:20:04,656 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2023-11-12 02:20:04,658 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-12 02:20:04,658 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:20:04,658 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:20:04,660 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:04,662 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-12 02:20:04,663 INFO L748 eck$LassoCheckResult]: Stem: 1620#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 1621#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 1601#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 1622#$Ultimate##0 ~n := #in~n; 1610#L17 assume !(~n < 1); 1611#L19 assume !(1 == ~n); 1614#L22 call #t~ret4 := fibonacci(~n - 1);< 1615#$Ultimate##0 ~n := #in~n; 1635#L17 assume !(~n < 1); 1678#L19 assume !(1 == ~n); 1674#L22 call #t~ret4 := fibonacci(~n - 1);< 1677#$Ultimate##0 ~n := #in~n; 1676#L17 assume !(~n < 1); 1675#L19 assume !(1 == ~n); 1670#L22 call #t~ret4 := fibonacci(~n - 1);< 1673#$Ultimate##0 ~n := #in~n; 1672#L17 assume !(~n < 1); 1671#L19 assume !(1 == ~n); 1666#L22 call #t~ret4 := fibonacci(~n - 1);< 1669#$Ultimate##0 ~n := #in~n; 1668#L17 assume !(~n < 1); 1667#L19 assume !(1 == ~n); 1662#L22 call #t~ret4 := fibonacci(~n - 1);< 1665#$Ultimate##0 ~n := #in~n; 1664#L17 assume !(~n < 1); 1663#L19 assume !(1 == ~n); 1652#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1660#L17 assume !(~n < 1); 1658#L19 assume !(1 == ~n); 1653#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1660#L17 assume !(~n < 1); 1658#L19 assume !(1 == ~n); 1653#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1661#L17 assume !(~n < 1); 1659#L19 assume 1 == ~n;#res := 1; 1657#fibonacciFINAL assume true; 1655#fibonacciEXIT >#31#return; 1604#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1654#$Ultimate##0 ~n := #in~n; 1741#L17 assume ~n < 1;#res := 0; 1740#fibonacciFINAL assume true; 1737#fibonacciEXIT >#33#return; 1736#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1735#fibonacciFINAL assume true; 1719#fibonacciEXIT >#31#return; 1707#L22-1 [2023-11-12 02:20:04,663 INFO L750 eck$LassoCheckResult]: Loop: 1707#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume !(1 == ~n); 1711#L22 call #t~ret4 := fibonacci(~n - 1);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume !(1 == ~n); 1711#L22 call #t~ret4 := fibonacci(~n - 1);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume 1 == ~n;#res := 1; 1743#fibonacciFINAL assume true; 1704#fibonacciEXIT >#31#return; 1710#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1729#$Ultimate##0 ~n := #in~n; 1744#L17 assume ~n < 1;#res := 0; 1745#fibonacciFINAL assume true; 1752#fibonacciEXIT >#33#return; 1713#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1749#fibonacciFINAL assume true; 1720#fibonacciEXIT >#31#return; 1707#L22-1 [2023-11-12 02:20:04,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash -407339347, now seen corresponding path program 2 times [2023-11-12 02:20:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005228722] [2023-11-12 02:20:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:04,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:04,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:20:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:04,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:20:04,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 2 times [2023-11-12 02:20:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680139810] [2023-11-12 02:20:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:04,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:20:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:20:04,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:20:04,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1472997803, now seen corresponding path program 3 times [2023-11-12 02:20:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798953666] [2023-11-12 02:20:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:20:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:20:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:20:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:20:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 122 proven. 136 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 02:20:05,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798953666] [2023-11-12 02:20:05,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798953666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139737605] [2023-11-12 02:20:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:20:05,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:05,153 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:05,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:20:05,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-12 02:20:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:20:05,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 113 proven. 47 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-12 02:20:05,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 113 proven. 49 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-12 02:20:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139737605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:05,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 12] total 31 [2023-11-12 02:20:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800813095] [2023-11-12 02:20:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:06,099 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:20:06,099 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:20:06,099 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:20:06,099 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:20:06,099 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:20:06,099 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,099 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:20:06,099 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:20:06,099 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2023-11-12 02:20:06,100 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:20:06,100 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:20:06,100 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,104 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,107 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,111 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,113 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,156 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:20:06,156 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:20:06,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-12 02:20:06,169 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:06,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,195 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:20:06,195 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:20:06,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,214 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:06,214 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-12 02:20:06,244 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:20:06,244 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#in~n=3} Honda state: {fibonacci_#in~n=3} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:20:06,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,252 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-12 02:20:06,258 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:06,258 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,275 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:20:06,275 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:20:06,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,283 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-12 02:20:06,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:06,286 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,304 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:20:06,305 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:20:06,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,315 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-12 02:20:06,318 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:20:06,318 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,334 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-12 02:20:06,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:20:06,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:20:06,350 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:20:06,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,354 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:20:06,354 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:20:06,354 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:20:06,354 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:20:06,354 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:20:06,354 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,354 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:20:06,355 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:20:06,355 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2023-11-12 02:20:06,355 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:20:06,355 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:20:06,356 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,365 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,368 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,370 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,375 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:20:06,434 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:20:06,434 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:20:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,436 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,441 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 [2023-11-12 02:20:06,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-12 02:20:06,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:06,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:06,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:06,452 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:06,452 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:06,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:06,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:06,463 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:06,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,468 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,477 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 [2023-11-12 02:20:06,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-12 02:20:06,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:06,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:06,489 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:06,489 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:06,489 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:06,490 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:06,490 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:06,492 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:06,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,495 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-12 02:20:06,502 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 [2023-11-12 02:20:06,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:06,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:06,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:06,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:06,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:06,513 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:06,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:06,549 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:20:06,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,558 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,565 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 [2023-11-12 02:20:06,577 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:20:06,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:20:06,578 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:20:06,578 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:20:06,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:20:06,579 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:20:06,579 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:20:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-12 02:20:06,596 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:20:06,600 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-12 02:20:06,600 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-12 02:20:06,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:20:06,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:06,604 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:06,605 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:20:06,605 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:20:06,605 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:20:06,605 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-12 02:20:06,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-12 02:20:06,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,609 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:20:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:06,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:06,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:20:06,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:06,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:20:06,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:20:07,121 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 [2023-11-12 02:20:07,121 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:07,375 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 296 states and 402 transitions. Complement of second has 45 states. [2023-11-12 02:20:07,377 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 [2023-11-12 02:20:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2023-11-12 02:20:07,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-12 02:20:07,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:07,380 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:20:07,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:07,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:20:07,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:07,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:20:07,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:20:07,880 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 [2023-11-12 02:20:07,880 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:08,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 357 states and 475 transitions. Complement of second has 25 states. [2023-11-12 02:20:08,056 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 [2023-11-12 02:20:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2023-11-12 02:20:08,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-12 02:20:08,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:08,058 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:20:08,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:20:08,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:20:08,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:20:08,505 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 [2023-11-12 02:20:08,506 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:08,815 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1307 states and 1827 transitions. Complement of second has 138 states. [2023-11-12 02:20:08,816 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 [2023-11-12 02:20:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2023-11-12 02:20:08,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-12 02:20:08,819 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:08,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2023-11-12 02:20:08,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:08,821 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2023-11-12 02:20:08,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:20:08,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1307 states and 1827 transitions. [2023-11-12 02:20:08,851 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2023-11-12 02:20:08,870 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1307 states to 789 states and 1177 transitions. [2023-11-12 02:20:08,871 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 305 [2023-11-12 02:20:08,872 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 344 [2023-11-12 02:20:08,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 789 states and 1177 transitions. [2023-11-12 02:20:08,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:20:08,873 INFO L218 hiAutomatonCegarLoop]: Abstraction has 789 states and 1177 transitions. [2023-11-12 02:20:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states and 1177 transitions. [2023-11-12 02:20:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 637. [2023-11-12 02:20:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 388 states have (on average 1.1623711340206186) internal successors, (451), 413 states have internal predecessors, (451), 153 states have call successors, (167), 77 states have call predecessors, (167), 96 states have return successors, (281), 146 states have call predecessors, (281), 142 states have call successors, (281) [2023-11-12 02:20:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 899 transitions. [2023-11-12 02:20:08,938 INFO L240 hiAutomatonCegarLoop]: Abstraction has 637 states and 899 transitions. [2023-11-12 02:20:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:20:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:20:08,940 INFO L87 Difference]: Start difference. First operand 637 states and 899 transitions. Second operand has 31 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 24 states have internal predecessors, (66), 17 states have call successors, (23), 10 states have call predecessors, (23), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-12 02:20:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:09,836 INFO L93 Difference]: Finished difference Result 533 states and 626 transitions. [2023-11-12 02:20:09,836 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 533 states and 626 transitions. [2023-11-12 02:20:09,844 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-12 02:20:09,844 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 533 states to 0 states and 0 transitions. [2023-11-12 02:20:09,845 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-12 02:20:09,845 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-12 02:20:09,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-12 02:20:09,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:09,845 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:20:09,845 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:20:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-12 02:20:09,846 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:20:09,846 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-12 02:20:09,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-12 02:20:09,847 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-12 02:20:09,847 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-12 02:20:09,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.11 02:20:09 BoogieIcfgContainer [2023-11-12 02:20:09,855 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-12 02:20:09,856 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:20:09,856 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:20:09,856 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:20:09,857 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:59" (3/4) ... [2023-11-12 02:20:09,859 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 02:20:09,860 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:20:09,861 INFO L158 Benchmark]: Toolchain (without parser) took 11212.27ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 80.2MB in the beginning and 113.6MB in the end (delta: -33.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:09,861 INFO L158 Benchmark]: CDTParser took 0.59ms. Allocated memory is still 123.7MB. Free memory was 94.6MB in the beginning and 94.5MB in the end (delta: 80.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:09,861 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.09ms. Allocated memory is still 123.7MB. Free memory was 79.9MB in the beginning and 69.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 02:20:09,862 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.44ms. Allocated memory is still 123.7MB. Free memory was 69.7MB in the beginning and 68.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:09,862 INFO L158 Benchmark]: Boogie Preprocessor took 16.57ms. Allocated memory is still 123.7MB. Free memory was 68.5MB in the beginning and 67.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:20:09,862 INFO L158 Benchmark]: RCFGBuilder took 236.04ms. Allocated memory is still 123.7MB. Free memory was 67.3MB in the beginning and 58.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 02:20:09,863 INFO L158 Benchmark]: BuchiAutomizer took 10687.30ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 58.1MB in the beginning and 113.6MB in the end (delta: -55.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:09,863 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 153.1MB. Free memory is still 113.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:09,865 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59ms. Allocated memory is still 123.7MB. Free memory was 94.6MB in the beginning and 94.5MB in the end (delta: 80.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.09ms. Allocated memory is still 123.7MB. Free memory was 79.9MB in the beginning and 69.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.44ms. Allocated memory is still 123.7MB. Free memory was 69.7MB in the beginning and 68.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.57ms. Allocated memory is still 123.7MB. Free memory was 68.5MB in the beginning and 67.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 236.04ms. Allocated memory is still 123.7MB. Free memory was 67.3MB in the beginning and 58.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 10687.30ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 58.1MB in the beginning and 113.6MB in the end (delta: -55.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 153.1MB. Free memory is still 113.6MB. 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 7 terminating modules (4 trivial, 2 deterministic, 1 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 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. 4 modules have a trivial ranking function, the largest among these consists of 31 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.6s and 6 iterations. TraceHistogramMax:10. Analysis of lassos took 5.5s. Construction of modules took 1.0s. Büchi inclusion checks took 3.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 183 StatesRemovedByMinimization, 4 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, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 583 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 567 mSDsluCounter, 442 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 296 mSDsCounter, 396 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1125 IncrementalHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 396 mSolverCounterUnsat, 146 mSDtfsCounter, 1125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq190 hnf90 smp88 dnf100 smp100 tf113 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 57ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-12 02:20:09,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:10,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:10,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:10,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:10,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280f19e-b6b6-4708-a072-2be9199da4a9/bin/uautomizer-verify-uTZkv6EMXl/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