./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu --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 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:32,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:32,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-19 07:57:32,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:32,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:32,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:32,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:32,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:32,815 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:32,816 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:32,817 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:32,817 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:57:32,818 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:57:32,819 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:57:32,819 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:57:32,820 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:57:32,820 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:57:32,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:32,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:57:32,822 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:32,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:32,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:32,824 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:32,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:57:32,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:57:32,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:57:32,827 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:57:32,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:32,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:57:32,828 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:57:32,829 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:32,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:32,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:32,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:32,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:32,832 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:57:32,833 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_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 [2023-11-19 07:57:33,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:33,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:33,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:33,110 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:33,110 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:33,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-19 07:57:36,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:36,509 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:36,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-19 07:57:36,518 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/data/790ad3dde/0cfb41fc2dc3473bbeb7deebb102b78b/FLAGa5efcf0e9 [2023-11-19 07:57:36,531 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/data/790ad3dde/0cfb41fc2dc3473bbeb7deebb102b78b [2023-11-19 07:57:36,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:36,536 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:36,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:36,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:36,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:36,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b952ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36, skipping insertion in model container [2023-11-19 07:57:36,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:36,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:36,792 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:36,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:36,829 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:36,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36 WrapperNode [2023-11-19 07:57:36,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:36,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:36,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:36,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:36,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,866 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-19 07:57:36,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:36,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:36,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:36,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:36,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,878 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:36,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:36,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:36,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:36,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2023-11-19 07:57:36,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:36,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:57:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-19 07:57:36,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-19 07:57:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-19 07:57:36,985 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-19 07:57:36,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:36,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:37,074 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:37,077 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:37,256 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:37,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:37,265 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:57:37,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:37 BoogieIcfgContainer [2023-11-19 07:57:37,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:37,272 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:57:37,273 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:57:37,277 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:57:37,278 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:57:37,278 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:57:36" (1/3) ... [2023-11-19 07:57:37,280 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@513fba33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:57:37, skipping insertion in model container [2023-11-19 07:57:37,281 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:57:37,282 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (2/3) ... [2023-11-19 07:57:37,283 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@513fba33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:57:37, skipping insertion in model container [2023-11-19 07:57:37,283 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:57:37,284 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:37" (3/3) ... [2023-11-19 07:57:37,285 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_4-1.c [2023-11-19 07:57:37,367 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:57:37,368 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:57:37,368 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:57:37,368 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:57:37,369 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:57:37,369 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:57:37,369 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:57:37,369 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:57:37,375 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:57:37,405 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:37,406 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:37,406 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:37,414 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:57:37,414 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:37,415 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:57:37,415 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:57:37,423 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:37,423 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:37,423 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:37,424 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:57:37,425 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:37,433 INFO L748 eck$LassoCheckResult]: Stem: 25#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 13#L39true call main_#t~ret8#1 := fibo1(main_~x~0#1);< 18#$Ultimate##0true [2023-11-19 07:57:37,434 INFO L750 eck$LassoCheckResult]: Loop: 18#$Ultimate##0true ~n := #in~n; 7#L10true assume !(~n < 1); 6#L12true assume !(1 == ~n); 8#L15true call #t~ret4 := fibo2(~n - 1);< 15#$Ultimate##0true ~n := #in~n; 10#L20true assume !(~n < 1); 14#L22true assume !(1 == ~n); 21#L25true call #t~ret6 := fibo1(~n - 1);< 18#$Ultimate##0true [2023-11-19 07:57:37,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2023-11-19 07:57:37,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:37,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22883953] [2023-11-19 07:57:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,602 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:37,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2023-11-19 07:57:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129935669] [2023-11-19 07:57:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:37,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2023-11-19 07:57:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:37,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131618117] [2023-11-19 07:57:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:37,700 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:37,952 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:37,953 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:37,953 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:37,954 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:37,954 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:37,954 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:37,954 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:37,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:37,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration1_Loop [2023-11-19 07:57:37,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:37,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:37,973 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:37,985 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:37,989 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:37,993 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:37,996 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,000 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,003 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,006 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,098 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:38,099 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,127 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:57:38,154 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,154 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2023-11-19 07:57:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:57:38,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,252 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,252 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:57:38,305 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,305 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,363 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,364 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-11-19 07:57:38,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:57:38,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,435 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,452 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,452 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:57:38,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,475 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:57:38,538 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,538 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:57:38,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,561 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,577 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:38,577 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:38,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,606 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:57:38,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:38,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:57:38,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:38,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:38,749 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:38,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,757 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:38,757 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:38,757 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:38,757 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:38,757 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:38,758 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,758 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:38,758 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:38,758 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration1_Loop [2023-11-19 07:57:38,758 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:38,758 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:38,760 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,764 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,767 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,770 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,773 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,776 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,787 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,790 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:38,856 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:38,862 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:57:38,874 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 [2023-11-19 07:57:38,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:38,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:38,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:38,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:38,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:38,892 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:38,892 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:38,903 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:38,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-19 07:57:38,929 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 [2023-11-19 07:57:38,946 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:38,946 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:38,947 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:38,947 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:38,947 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:38,948 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:38,948 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:38,959 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:38,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:38,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:57:38,983 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 [2023-11-19 07:57:38,993 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:38,994 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:38,994 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:38,994 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:38,994 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:38,995 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:38,995 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:38,999 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:39,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:39,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:39,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:39,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:57:39,014 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 [2023-11-19 07:57:39,024 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:39,024 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:39,025 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:39,025 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:39,025 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:39,026 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:39,026 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:39,028 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:39,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:39,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:39,062 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:39,075 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 [2023-11-19 07:57:39,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:57:39,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:39,089 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:39,089 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:39,090 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:39,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:39,091 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:39,091 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:39,115 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:39,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:39,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:39,146 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:39,157 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 [2023-11-19 07:57:39,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:39,170 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:39,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:39,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:39,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:39,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:57:39,173 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:39,173 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:39,187 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:39,202 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:57:39,203 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:57:39,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:39,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:39,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 07:57:39,245 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:39,245 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:39,245 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:39,246 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2023-11-19 07:57:39,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:39,262 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:39,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:39,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:57:39,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:39,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:39,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:39,492 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2023-11-19 07:57:39,495 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:39,708 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 85 states and 117 transitions. Complement of second has 24 states. [2023-11-19 07:57:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2023-11-19 07:57:39,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-19 07:57:39,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:39,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-19 07:57:39,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:39,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2023-11-19 07:57:39,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:39,722 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2023-11-19 07:57:39,729 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:39,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2023-11-19 07:57:39,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-11-19 07:57:39,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-11-19 07:57:39,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2023-11-19 07:57:39,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:39,742 INFO L218 hiAutomatonCegarLoop]: Abstraction has 61 states and 82 transitions. [2023-11-19 07:57:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2023-11-19 07:57:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2023-11-19 07:57:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-19 07:57:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-11-19 07:57:39,776 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-19 07:57:39,776 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-19 07:57:39,777 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:57:39,777 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2023-11-19 07:57:39,779 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:39,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:39,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:39,780 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:39,780 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:39,781 INFO L748 eck$LassoCheckResult]: Stem: 236#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 223#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 218#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 217#$Ultimate##0 ~n := #in~n; 219#L10 assume !(~n < 1); 229#L12 assume !(1 == ~n); 213#L15 call #t~ret4 := fibo2(~n - 1);< 233#$Ultimate##0 ~n := #in~n; 247#L20 assume !(~n < 1); 248#L22 assume !(1 == ~n); 203#L25 call #t~ret6 := fibo1(~n - 1);< 220#$Ultimate##0 ~n := #in~n; 222#L10 assume ~n < 1;#res := 0; 209#fibo1FINAL assume true; 210#fibo1EXIT >#48#return; 211#L25-1 [2023-11-19 07:57:39,781 INFO L750 eck$LassoCheckResult]: Loop: 211#L25-1 call #t~ret7 := fibo1(~n - 2);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume !(~n < 1); 243#L12 assume !(1 == ~n); 212#L15 call #t~ret4 := fibo2(~n - 1);< 225#$Ultimate##0 ~n := #in~n; 245#L20 assume !(~n < 1); 246#L22 assume !(1 == ~n); 224#L25 call #t~ret6 := fibo1(~n - 1);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume ~n < 1;#res := 0; 238#fibo1FINAL assume true; 239#fibo1EXIT >#48#return; 211#L25-1 [2023-11-19 07:57:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2023-11-19 07:57:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:39,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528185564] [2023-11-19 07:57:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:39,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:57:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:39,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:39,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528185564] [2023-11-19 07:57:39,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528185564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:40,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:57:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477398646] [2023-11-19 07:57:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:40,005 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:40,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2023-11-19 07:57:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:40,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802652552] [2023-11-19 07:57:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:40,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:57:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:40,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:40,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802652552] [2023-11-19 07:57:40,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802652552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:40,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:40,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:57:40,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506669489] [2023-11-19 07:57:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:40,142 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:57:40,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:57:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:57:40,146 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:57:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:40,225 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-19 07:57:40,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2023-11-19 07:57:40,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:40,232 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2023-11-19 07:57:40,232 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2023-11-19 07:57:40,232 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-19 07:57:40,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2023-11-19 07:57:40,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:40,233 INFO L218 hiAutomatonCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-19 07:57:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2023-11-19 07:57:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-11-19 07:57:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-19 07:57:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-19 07:57:40,242 INFO L240 hiAutomatonCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-19 07:57:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:57:40,243 INFO L428 stractBuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-19 07:57:40,243 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:57:40,244 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2023-11-19 07:57:40,245 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 07:57:40,246 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:40,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:40,247 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:40,247 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:40,247 INFO L748 eck$LassoCheckResult]: Stem: 381#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 365#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 366#$Ultimate##0 ~n := #in~n; 367#L10 assume !(~n < 1); 395#L12 assume !(1 == ~n); 359#L15 call #t~ret4 := fibo2(~n - 1);< 379#$Ultimate##0 ~n := #in~n; 396#L20 assume !(~n < 1); 397#L22 assume !(1 == ~n); 348#L25 call #t~ret6 := fibo1(~n - 1);< 368#$Ultimate##0 ~n := #in~n; 370#L10 assume !(~n < 1); 373#L12 assume 1 == ~n;#res := 1; 374#fibo1FINAL assume true; 386#fibo1EXIT >#48#return; 355#L25-1 [2023-11-19 07:57:40,248 INFO L750 eck$LassoCheckResult]: Loop: 355#L25-1 call #t~ret7 := fibo1(~n - 2);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume !(1 == ~n); 361#L15 call #t~ret4 := fibo2(~n - 1);< 392#$Ultimate##0 ~n := #in~n; 391#L20 assume !(~n < 1); 389#L22 assume !(1 == ~n); 356#L25 call #t~ret6 := fibo1(~n - 1);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume 1 == ~n;#res := 1; 384#fibo1FINAL assume true; 385#fibo1EXIT >#48#return; 355#L25-1 [2023-11-19 07:57:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2023-11-19 07:57:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792250824] [2023-11-19 07:57:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:57:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:40,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:40,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792250824] [2023-11-19 07:57:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792250824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:40,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414711237] [2023-11-19 07:57:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:40,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:40,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:40,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:40,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:57:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:40,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:57:40,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:40,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414711237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-11-19 07:57:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117049194] [2023-11-19 07:57:40,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:40,612 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:40,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2023-11-19 07:57:40,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:40,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282639381] [2023-11-19 07:57:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:40,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:40,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:40,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:40,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:40,944 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:40,944 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:40,945 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:40,945 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:40,945 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:40,945 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:40,945 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:40,945 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:40,945 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration3_Loop [2023-11-19 07:57:40,945 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:40,946 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:40,948 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,952 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,955 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,958 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,962 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,966 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,973 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,975 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:40,978 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,050 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:41,050 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 07:57:41,056 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,056 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,092 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:41,092 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=2} Honda state: {fibo2_#in~n=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:41,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 07:57:41,148 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:41,148 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:41,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,184 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,185 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:57:41,208 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:41,208 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:41,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,223 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 07:57:41,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,227 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,239 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:41,240 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:41,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 07:57:41,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,265 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:41,276 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:41,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2023-11-19 07:57:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,291 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-19 07:57:41,294 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:41,294 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2023-11-19 07:57:41,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,337 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 07:57:41,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:41,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:41,357 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:41,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,374 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:41,374 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:41,374 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:41,374 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:41,374 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:41,374 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,374 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:41,375 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:41,375 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration3_Loop [2023-11-19 07:57:41,375 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:41,375 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:41,376 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,394 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,396 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,398 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,400 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,407 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,410 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,413 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,416 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:41,476 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:41,476 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,479 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,483 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 [2023-11-19 07:57:41,496 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:41,496 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:41,496 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:41,496 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:41,496 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:41,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:41,500 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:41,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:57:41,511 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:41,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,536 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,539 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 [2023-11-19 07:57:41,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:57:41,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:41,551 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:41,551 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:41,551 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:41,552 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:41,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:41,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:41,571 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:41,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,596 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 [2023-11-19 07:57:41,608 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:41,609 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:41,609 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:41,609 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:41,609 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:41,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:41,610 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:41,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:57:41,619 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:41,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,644 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,647 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 [2023-11-19 07:57:41,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:57:41,660 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:41,660 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:41,660 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:41,660 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:41,660 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:41,661 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:41,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:41,670 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:41,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,691 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,696 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:57:41,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 07:57:41,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:41,709 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:41,709 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:41,709 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:41,709 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:41,711 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:41,711 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:41,720 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:41,723 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:57:41,724 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:57:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:41,726 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:41,727 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:41,727 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:41,728 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:41,728 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2023-11-19 07:57:41,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-19 07:57:41,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,752 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:41,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:41,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:57:41,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:41,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:57:41,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:42,092 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-19 07:57:42,092 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:57:42,592 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 191 states and 263 transitions. Complement of second has 40 states. [2023-11-19 07:57:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:57:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2023-11-19 07:57:42,596 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2023-11-19 07:57:42,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:42,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2023-11-19 07:57:42,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:42,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2023-11-19 07:57:42,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:42,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2023-11-19 07:57:42,606 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 07:57:42,613 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2023-11-19 07:57:42,613 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2023-11-19 07:57:42,614 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2023-11-19 07:57:42,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2023-11-19 07:57:42,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:42,616 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 237 transitions. [2023-11-19 07:57:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2023-11-19 07:57:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2023-11-19 07:57:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (48), 30 states have call predecessors, (48), 33 states have call successors, (48) [2023-11-19 07:57:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2023-11-19 07:57:42,637 INFO L240 hiAutomatonCegarLoop]: Abstraction has 152 states and 206 transitions. [2023-11-19 07:57:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:57:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:57:42,638 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:57:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:42,776 INFO L93 Difference]: Finished difference Result 183 states and 247 transitions. [2023-11-19 07:57:42,776 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 247 transitions. [2023-11-19 07:57:42,781 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 07:57:42,786 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 243 transitions. [2023-11-19 07:57:42,787 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2023-11-19 07:57:42,787 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2023-11-19 07:57:42,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 243 transitions. [2023-11-19 07:57:42,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:42,788 INFO L218 hiAutomatonCegarLoop]: Abstraction has 180 states and 243 transitions. [2023-11-19 07:57:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 243 transitions. [2023-11-19 07:57:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2023-11-19 07:57:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 111 states have internal predecessors, (129), 38 states have call successors, (40), 20 states have call predecessors, (40), 25 states have return successors, (56), 33 states have call predecessors, (56), 36 states have call successors, (56) [2023-11-19 07:57:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2023-11-19 07:57:42,806 INFO L240 hiAutomatonCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-19 07:57:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:57:42,808 INFO L428 stractBuchiCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-19 07:57:42,808 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:57:42,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 165 states and 225 transitions. [2023-11-19 07:57:42,811 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 07:57:42,811 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:42,811 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:42,813 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:42,813 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:42,813 INFO L748 eck$LassoCheckResult]: Stem: 1269#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 1239#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 1240#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 1273#$Ultimate##0 ~n := #in~n; 1264#L10 assume !(~n < 1); 1257#L12 assume !(1 == ~n); 1226#L15 call #t~ret4 := fibo2(~n - 1);< 1265#$Ultimate##0 ~n := #in~n; 1267#L20 assume !(~n < 1); 1268#L22 assume !(1 == ~n); 1241#L25 call #t~ret6 := fibo1(~n - 1);< 1242#$Ultimate##0 ~n := #in~n; 1303#L10 assume !(~n < 1); 1308#L12 assume !(1 == ~n); 1310#L15 call #t~ret4 := fibo2(~n - 1);< 1316#$Ultimate##0 ~n := #in~n; 1319#L20 assume ~n < 1;#res := 0; 1317#fibo2FINAL assume true; 1315#fibo2EXIT >#52#return; 1313#L15-1 call #t~ret5 := fibo2(~n - 2);< 1314#$Ultimate##0 ~n := #in~n; 1321#L20 assume ~n < 1;#res := 0; 1318#fibo2FINAL assume true; 1312#fibo2EXIT >#54#return; 1311#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1306#fibo1FINAL assume true; 1307#fibo1EXIT >#48#return; 1244#L25-1 call #t~ret7 := fibo1(~n - 2);< 1300#$Ultimate##0 ~n := #in~n; 1331#L10 assume ~n < 1;#res := 0; 1271#fibo1FINAL assume true; 1365#fibo1EXIT >#50#return; 1234#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 1245#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1203#L15-1 call #t~ret5 := fibo2(~n - 2);< 1329#$Ultimate##0 [2023-11-19 07:57:42,814 INFO L750 eck$LassoCheckResult]: Loop: 1329#$Ultimate##0 ~n := #in~n; 1323#L20 assume !(~n < 1); 1202#L22 assume !(1 == ~n); 1207#L25 call #t~ret6 := fibo1(~n - 1);< 1227#$Ultimate##0 ~n := #in~n; 1236#L10 assume !(~n < 1); 1263#L12 assume !(1 == ~n); 1204#L15 call #t~ret4 := fibo2(~n - 1);< 1329#$Ultimate##0 [2023-11-19 07:57:42,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1873386980, now seen corresponding path program 1 times [2023-11-19 07:57:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852448485] [2023-11-19 07:57:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:57:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:57:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:57:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:57:42,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:42,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852448485] [2023-11-19 07:57:42,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852448485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614839687] [2023-11-19 07:57:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:42,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:42,970 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:42,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-19 07:57:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:43,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:57:43,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:43,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:57:43,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:57:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614839687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:43,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:43,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 16 [2023-11-19 07:57:43,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119191090] [2023-11-19 07:57:43,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:43,563 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:43,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2023-11-19 07:57:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:43,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815908251] [2023-11-19 07:57:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:43,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:43,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:43,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:43,691 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:43,691 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:43,691 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:43,691 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:43,691 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:43,691 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,692 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:43,692 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:43,692 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration4_Loop [2023-11-19 07:57:43,692 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:43,692 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:43,693 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,695 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,698 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,700 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,702 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,704 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,706 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,716 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:43,775 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:43,776 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,777 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,780 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-19 07:57:43,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,804 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:43,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,824 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-19 07:57:43,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,838 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,839 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2023-11-19 07:57:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,854 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-19 07:57:43,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,867 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,867 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2023-11-19 07:57:43,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,883 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,884 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-19 07:57:43,897 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,897 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:43,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,914 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-19 07:57:43,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,930 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,930 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:43,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,946 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-19 07:57:43,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:43,959 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:43,959 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:43,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2023-11-19 07:57:43,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:43,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:43,974 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:43,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-19 07:57:43,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:43,976 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:44,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:44,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,047 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,050 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:44,050 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:44,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-19 07:57:44,131 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:44,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2023-11-19 07:57:44,134 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:44,135 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:44,135 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:44,135 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:44,135 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:44,135 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,135 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:44,135 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:44,135 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration4_Loop [2023-11-19 07:57:44,135 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:44,135 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:44,136 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,153 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,156 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,159 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,161 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,164 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,167 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,169 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:44,225 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:44,225 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:44,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,227 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,237 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 [2023-11-19 07:57:44,249 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,250 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,250 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,250 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,250 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,251 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,251 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-19 07:57:44,267 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:44,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,291 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,296 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 [2023-11-19 07:57:44,309 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,309 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,309 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,309 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,309 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,310 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-19 07:57:44,323 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,348 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,352 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 [2023-11-19 07:57:44,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,365 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,365 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-19 07:57:44,366 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,366 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,367 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2023-11-19 07:57:44,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,380 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-19 07:57:44,384 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 [2023-11-19 07:57:44,394 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,394 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,394 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,395 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,395 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,427 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:44,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,448 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,456 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 [2023-11-19 07:57:44,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-19 07:57:44,468 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,468 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,469 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,469 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,470 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2023-11-19 07:57:44,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,483 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-19 07:57:44,485 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 [2023-11-19 07:57:44,495 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,495 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,495 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,495 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,496 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,496 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,496 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,498 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Ended with exit code 0 [2023-11-19 07:57:44,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,511 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-19 07:57:44,513 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:57:44,526 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,526 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,526 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,526 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,526 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,527 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,527 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,531 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:44,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2023-11-19 07:57:44,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,544 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-19 07:57:44,546 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 [2023-11-19 07:57:44,557 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:44,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:44,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:44,558 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:44,558 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:44,558 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:44,559 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:44,561 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:44,581 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:57:44,581 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:57:44,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:44,583 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:44,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-19 07:57:44,585 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:44,585 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:44,585 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:44,585 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2023-11-19 07:57:44,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2023-11-19 07:57:44,598 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:44,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:44,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:44,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:45,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:45,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:45,153 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2023-11-19 07:57:45,153 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:45,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:45,366 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 671 states and 941 transitions. Complement of second has 26 states. [2023-11-19 07:57:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-19 07:57:45,368 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 07:57:45,369 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:45,369 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:45,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:45,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:45,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:45,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:45,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:45,797 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2023-11-19 07:57:45,797 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:45,993 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 671 states and 941 transitions. Complement of second has 26 states. [2023-11-19 07:57:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-19 07:57:45,996 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 07:57:45,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:45,996 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:46,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:46,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:46,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:46,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:46,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:46,510 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 5 loop predicates [2023-11-19 07:57:46,511 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:46,711 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 553 states and 762 transitions. Complement of second has 25 states. [2023-11-19 07:57:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:57:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2023-11-19 07:57:46,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 07:57:46,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:46,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 44 letters. Loop has 8 letters. [2023-11-19 07:57:46,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:46,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 16 letters. [2023-11-19 07:57:46,723 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:46,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 553 states and 762 transitions. [2023-11-19 07:57:46,737 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 56 [2023-11-19 07:57:46,754 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 553 states to 445 states and 639 transitions. [2023-11-19 07:57:46,755 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 195 [2023-11-19 07:57:46,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2023-11-19 07:57:46,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 445 states and 639 transitions. [2023-11-19 07:57:46,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:46,760 INFO L218 hiAutomatonCegarLoop]: Abstraction has 445 states and 639 transitions. [2023-11-19 07:57:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states and 639 transitions. [2023-11-19 07:57:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 370. [2023-11-19 07:57:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 246 states have (on average 1.2845528455284554) internal successors, (316), 269 states have internal predecessors, (316), 71 states have call successors, (74), 55 states have call predecessors, (74), 53 states have return successors, (117), 45 states have call predecessors, (117), 69 states have call successors, (117) [2023-11-19 07:57:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 507 transitions. [2023-11-19 07:57:46,829 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 507 transitions. [2023-11-19 07:57:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:57:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:57:46,830 INFO L87 Difference]: Start difference. First operand 370 states and 507 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (12), 3 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-19 07:57:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:47,166 INFO L93 Difference]: Finished difference Result 449 states and 635 transitions. [2023-11-19 07:57:47,167 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 449 states and 635 transitions. [2023-11-19 07:57:47,175 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 07:57:47,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 449 states to 410 states and 591 transitions. [2023-11-19 07:57:47,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2023-11-19 07:57:47,183 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 229 [2023-11-19 07:57:47,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 591 transitions. [2023-11-19 07:57:47,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:47,184 INFO L218 hiAutomatonCegarLoop]: Abstraction has 410 states and 591 transitions. [2023-11-19 07:57:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 591 transitions. [2023-11-19 07:57:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 359. [2023-11-19 07:57:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 233 states have (on average 1.240343347639485) internal successors, (289), 261 states have internal predecessors, (289), 74 states have call successors, (77), 50 states have call predecessors, (77), 52 states have return successors, (130), 47 states have call predecessors, (130), 72 states have call successors, (130) [2023-11-19 07:57:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2023-11-19 07:57:47,213 INFO L240 hiAutomatonCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-19 07:57:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:57:47,217 INFO L428 stractBuchiCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-19 07:57:47,217 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 07:57:47,217 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 496 transitions. [2023-11-19 07:57:47,221 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 07:57:47,221 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:47,221 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:47,226 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:47,226 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1] [2023-11-19 07:57:47,227 INFO L748 eck$LassoCheckResult]: Stem: 4978#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 4943#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 4944#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 4981#$Ultimate##0 ~n := #in~n; 5106#L10 assume !(~n < 1); 5105#L12 assume !(1 == ~n); 5096#L15 call #t~ret4 := fibo2(~n - 1);< 5104#$Ultimate##0 ~n := #in~n; 5103#L20 assume !(~n < 1); 5102#L22 assume !(1 == ~n); 4954#L25 call #t~ret6 := fibo1(~n - 1);< 5094#$Ultimate##0 ~n := #in~n; 5095#L10 assume !(~n < 1); 5131#L12 assume !(1 == ~n); 5088#L15 call #t~ret4 := fibo2(~n - 1);< 5129#$Ultimate##0 ~n := #in~n; 5134#L20 assume !(~n < 1); 5133#L22 assume 1 == ~n;#res := 1; 5130#fibo2FINAL assume true; 5128#fibo2EXIT >#52#return; 4952#L15-1 call #t~ret5 := fibo2(~n - 2);< 4956#$Ultimate##0 ~n := #in~n; 5141#L20 assume ~n < 1;#res := 0; 5140#fibo2FINAL assume true; 5139#fibo2EXIT >#54#return; 5138#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5137#fibo1FINAL assume true; 5136#fibo1EXIT >#48#return; 5078#L25-1 call #t~ret7 := fibo1(~n - 2);< 5114#$Ultimate##0 ~n := #in~n; 5231#L10 assume ~n < 1;#res := 0; 5230#fibo1FINAL assume true; 5165#fibo1EXIT >#50#return; 5166#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5185#fibo2FINAL assume true; 5184#fibo2EXIT >#52#return; 5112#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 [2023-11-19 07:57:47,228 INFO L750 eck$LassoCheckResult]: Loop: 5113#$Ultimate##0 ~n := #in~n; 5181#L20 assume !(~n < 1); 5180#L22 assume !(1 == ~n); 4941#L25 call #t~ret6 := fibo1(~n - 1);< 5122#$Ultimate##0 ~n := #in~n; 5124#L10 assume !(~n < 1); 5125#L12 assume !(1 == ~n); 5118#L15 call #t~ret4 := fibo2(~n - 1);< 5153#$Ultimate##0 ~n := #in~n; 5181#L20 assume !(~n < 1); 5180#L22 assume !(1 == ~n); 4941#L25 call #t~ret6 := fibo1(~n - 1);< 5122#$Ultimate##0 ~n := #in~n; 5124#L10 assume !(~n < 1); 5125#L12 assume !(1 == ~n); 5118#L15 call #t~ret4 := fibo2(~n - 1);< 5153#$Ultimate##0 ~n := #in~n; 5182#L20 assume !(~n < 1); 5207#L22 assume 1 == ~n;#res := 1; 5206#fibo2FINAL assume true; 5195#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#48#return; 5156#L25-1 call #t~ret7 := fibo1(~n - 2);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume !(~n < 1); 5164#L12 assume !(1 == ~n); 5147#L15 call #t~ret4 := fibo2(~n - 1);< 5157#$Ultimate##0 ~n := #in~n; 5194#L20 assume !(~n < 1); 5191#L22 assume !(1 == ~n); 5155#L25 call #t~ret6 := fibo1(~n - 1);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume !(~n < 1); 5164#L12 assume !(1 == ~n); 5147#L15 call #t~ret4 := fibo2(~n - 1);< 5157#$Ultimate##0 ~n := #in~n; 5194#L20 assume !(~n < 1); 5191#L22 assume 1 == ~n;#res := 1; 5192#fibo2FINAL assume true; 5196#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#48#return; 5156#L25-1 call #t~ret7 := fibo1(~n - 2);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume ~n < 1;#res := 0; 5163#fibo1FINAL assume true; 5188#fibo1EXIT >#50#return; 5187#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5152#fibo2FINAL assume true; 5145#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#50#return; 5187#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5152#fibo2FINAL assume true; 5145#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 [2023-11-19 07:57:47,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1302122831, now seen corresponding path program 1 times [2023-11-19 07:57:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736323690] [2023-11-19 07:57:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:57:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:57:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:57:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:47,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736323690] [2023-11-19 07:57:47,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736323690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:47,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294194350] [2023-11-19 07:57:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:47,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:47,532 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-19 07:57:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:57:47,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:57:47,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:57:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294194350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:47,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-19 07:57:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487004827] [2023-11-19 07:57:47,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:47,897 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:47,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -96284739, now seen corresponding path program 1 times [2023-11-19 07:57:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:47,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385835436] [2023-11-19 07:57:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-19 07:57:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:57:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:57:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-19 07:57:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-19 07:57:48,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385835436] [2023-11-19 07:57:48,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385835436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600422433] [2023-11-19 07:57:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:48,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:48,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:48,333 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:48,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-19 07:57:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:48,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:57:48,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 07:57:48,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 07:57:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600422433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:49,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:49,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-19 07:57:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725848079] [2023-11-19 07:57:49,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:49,014 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:57:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:57:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:57:49,015 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. cyclomatic complexity: 144 Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-19 07:57:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:49,222 INFO L93 Difference]: Finished difference Result 387 states and 546 transitions. [2023-11-19 07:57:49,222 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 387 states and 546 transitions. [2023-11-19 07:57:49,229 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 07:57:49,235 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 387 states to 387 states and 546 transitions. [2023-11-19 07:57:49,236 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 209 [2023-11-19 07:57:49,236 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 209 [2023-11-19 07:57:49,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 546 transitions. [2023-11-19 07:57:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:49,237 INFO L218 hiAutomatonCegarLoop]: Abstraction has 387 states and 546 transitions. [2023-11-19 07:57:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states and 546 transitions. [2023-11-19 07:57:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 369. [2023-11-19 07:57:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 238 states have (on average 1.2352941176470589) internal successors, (294), 269 states have internal predecessors, (294), 75 states have call successors, (78), 50 states have call predecessors, (78), 56 states have return successors, (136), 49 states have call predecessors, (136), 73 states have call successors, (136) [2023-11-19 07:57:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 508 transitions. [2023-11-19 07:57:49,255 INFO L240 hiAutomatonCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-19 07:57:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:57:49,256 INFO L428 stractBuchiCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-19 07:57:49,256 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 07:57:49,257 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 508 transitions. [2023-11-19 07:57:49,260 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 07:57:49,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:49,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:49,262 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:49,262 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:49,262 INFO L748 eck$LassoCheckResult]: Stem: 6699#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 6651#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 6652#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 6702#$Ultimate##0 ~n := #in~n; 6751#L10 assume !(~n < 1); 6750#L12 assume !(1 == ~n); 6701#L15 call #t~ret4 := fibo2(~n - 1);< 6748#$Ultimate##0 ~n := #in~n; 6747#L20 assume !(~n < 1); 6743#L22 assume !(1 == ~n); 6663#L25 call #t~ret6 := fibo1(~n - 1);< 6739#$Ultimate##0 ~n := #in~n; 6731#L10 assume !(~n < 1); 6732#L12 assume !(1 == ~n); 6718#L15 call #t~ret4 := fibo2(~n - 1);< 6719#$Ultimate##0 ~n := #in~n; 6737#L20 assume !(~n < 1); 6738#L22 assume !(1 == ~n); 6662#L25 call #t~ret6 := fibo1(~n - 1);< 6739#$Ultimate##0 ~n := #in~n; 6745#L10 assume !(~n < 1); 6835#L12 assume 1 == ~n;#res := 1; 6834#fibo1FINAL assume true; 6833#fibo1EXIT >#48#return; 6766#L25-1 call #t~ret7 := fibo1(~n - 2);< 6814#$Ultimate##0 ~n := #in~n; 6966#L10 assume ~n < 1;#res := 0; 6967#fibo1FINAL assume true; 6983#fibo1EXIT >#50#return; 6647#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6915#fibo2FINAL assume true; 6841#fibo2EXIT >#52#return; 6695#L15-1 [2023-11-19 07:57:49,262 INFO L750 eck$LassoCheckResult]: Loop: 6695#L15-1 call #t~ret5 := fibo2(~n - 2);< 6828#$Ultimate##0 ~n := #in~n; 6692#L20 assume !(~n < 1); 6698#L22 assume !(1 == ~n); 6649#L25 call #t~ret6 := fibo1(~n - 1);< 6822#$Ultimate##0 ~n := #in~n; 6920#L10 assume !(~n < 1); 6858#L12 assume !(1 == ~n); 6694#L15 call #t~ret4 := fibo2(~n - 1);< 6854#$Ultimate##0 ~n := #in~n; 6864#L20 assume !(~n < 1); 6875#L22 assume !(1 == ~n); 6876#L25 call #t~ret6 := fibo1(~n - 1);< 6897#$Ultimate##0 ~n := #in~n; 6900#L10 assume !(~n < 1); 6898#L12 assume 1 == ~n;#res := 1; 6894#fibo1FINAL assume true; 6895#fibo1EXIT >#48#return; 6881#L25-1 call #t~ret7 := fibo1(~n - 2);< 6882#$Ultimate##0 ~n := #in~n; 6901#L10 assume ~n < 1;#res := 0; 6899#fibo1FINAL assume true; 6880#fibo1EXIT >#50#return; 6874#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6870#fibo2FINAL assume true; 6866#fibo2EXIT >#52#return; 6695#L15-1 [2023-11-19 07:57:49,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2023-11-19 07:57:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:49,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572769981] [2023-11-19 07:57:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:57:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:57:49,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:49,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572769981] [2023-11-19 07:57:49,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572769981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:49,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559768292] [2023-11-19 07:57:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:49,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:49,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:49,424 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-19 07:57:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:49,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:49,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559768292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:49,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-19 07:57:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036537825] [2023-11-19 07:57:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:49,777 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1404661389, now seen corresponding path program 1 times [2023-11-19 07:57:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519581105] [2023-11-19 07:57:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:49,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:49,789 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:50,061 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:50,061 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:50,061 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:50,061 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:50,061 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:50,061 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,062 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:50,062 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:50,062 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration6_Loop [2023-11-19 07:57:50,062 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:50,062 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:50,063 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,065 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,068 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,070 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,073 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,078 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,080 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,082 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,084 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,125 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:50,126 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:50,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,131 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:50,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2023-11-19 07:57:50,161 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:50,161 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:50,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,179 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:50,183 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2023-11-19 07:57:50,196 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:50,196 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:50,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:50,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,210 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2023-11-19 07:57:50,212 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:50,212 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,223 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:50,223 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:50,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,241 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-19 07:57:50,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:50,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,254 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:57:50,254 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=3} Honda state: {fibo1_#in~n=3} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:57:50,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2023-11-19 07:57:50,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,269 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-19 07:57:50,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:50,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2023-11-19 07:57:50,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,296 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-19 07:57:50,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:50,298 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:50,311 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:50,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2023-11-19 07:57:50,322 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:50,322 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:50,323 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:50,323 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:50,323 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:50,323 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,323 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:50,323 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:50,323 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration6_Loop [2023-11-19 07:57:50,323 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:50,323 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:50,324 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,328 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,336 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,339 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,346 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,348 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,351 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,358 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:50,419 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:50,419 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,420 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,423 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 [2023-11-19 07:57:50,435 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:50,435 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:50,435 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:50,435 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:50,435 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:50,436 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:50,436 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:50,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-19 07:57:50,447 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:50,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2023-11-19 07:57:50,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,470 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-19 07:57:50,471 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 [2023-11-19 07:57:50,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:50,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:50,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:50,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:50,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:50,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:50,482 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:50,484 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:57:50,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2023-11-19 07:57:50,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,498 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-19 07:57:50,499 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 [2023-11-19 07:57:50,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:50,509 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:50,509 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:50,509 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:50,509 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:50,510 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:50,510 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:50,519 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:50,523 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:57:50,523 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:57:50,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:50,527 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:50,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2023-11-19 07:57:50,529 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:50,530 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:50,530 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:50,530 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 07:57:50,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2023-11-19 07:57:50,542 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:50,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:50,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:50,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:50,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:57:50,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:51,014 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2023-11-19 07:57:51,015 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 146 Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:57:51,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:51,494 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 146. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1744 states and 2390 transitions. Complement of second has 46 states. [2023-11-19 07:57:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:57:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 68 transitions. [2023-11-19 07:57:51,497 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 26 letters. [2023-11-19 07:57:51,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:51,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 58 letters. Loop has 26 letters. [2023-11-19 07:57:51,498 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:51,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 52 letters. [2023-11-19 07:57:51,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:51,499 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1744 states and 2390 transitions. [2023-11-19 07:57:51,526 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 143 [2023-11-19 07:57:51,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1744 states to 1582 states and 2212 transitions. [2023-11-19 07:57:51,552 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 538 [2023-11-19 07:57:51,553 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 572 [2023-11-19 07:57:51,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1582 states and 2212 transitions. [2023-11-19 07:57:51,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:51,554 INFO L218 hiAutomatonCegarLoop]: Abstraction has 1582 states and 2212 transitions. [2023-11-19 07:57:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states and 2212 transitions. [2023-11-19 07:57:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1505. [2023-11-19 07:57:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 954 states have (on average 1.2348008385744236) internal successors, (1178), 1084 states have internal predecessors, (1178), 316 states have call successors, (331), 191 states have call predecessors, (331), 235 states have return successors, (597), 229 states have call predecessors, (597), 314 states have call successors, (597) [2023-11-19 07:57:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2106 transitions. [2023-11-19 07:57:51,618 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1505 states and 2106 transitions. [2023-11-19 07:57:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:51,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:57:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:57:51,619 INFO L87 Difference]: Start difference. First operand 1505 states and 2106 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:57:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:51,861 INFO L93 Difference]: Finished difference Result 1604 states and 1988 transitions. [2023-11-19 07:57:51,861 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1604 states and 1988 transitions. [2023-11-19 07:57:51,883 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 147 [2023-11-19 07:57:51,890 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1604 states to 594 states and 683 transitions. [2023-11-19 07:57:51,891 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2023-11-19 07:57:51,891 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 289 [2023-11-19 07:57:51,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 594 states and 683 transitions. [2023-11-19 07:57:51,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:51,892 INFO L218 hiAutomatonCegarLoop]: Abstraction has 594 states and 683 transitions. [2023-11-19 07:57:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states and 683 transitions. [2023-11-19 07:57:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 482. [2023-11-19 07:57:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 315 states have (on average 1.1587301587301588) internal successors, (365), 352 states have internal predecessors, (365), 99 states have call successors, (101), 76 states have call predecessors, (101), 68 states have return successors, (83), 53 states have call predecessors, (83), 65 states have call successors, (83) [2023-11-19 07:57:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 549 transitions. [2023-11-19 07:57:51,908 INFO L240 hiAutomatonCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-19 07:57:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:57:51,909 INFO L428 stractBuchiCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-19 07:57:51,909 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-19 07:57:51,909 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 482 states and 549 transitions. [2023-11-19 07:57:51,913 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 102 [2023-11-19 07:57:51,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:51,913 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:51,914 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:51,914 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:51,914 INFO L748 eck$LassoCheckResult]: Stem: 12400#$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(18, 2);call #Ultimate.allocInit(12, 3); 12375#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 12376#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 12406#$Ultimate##0 ~n := #in~n; 12435#L10 assume !(~n < 1); 12433#L12 assume !(1 == ~n); 12385#L15 call #t~ret4 := fibo2(~n - 1);< 12427#$Ultimate##0 ~n := #in~n; 12422#L20 assume !(~n < 1); 12418#L22 assume !(1 == ~n); 12413#L25 call #t~ret6 := fibo1(~n - 1);< 12415#$Ultimate##0 ~n := #in~n; 12437#L10 assume !(~n < 1); 12440#L12 assume !(1 == ~n); 12430#L15 call #t~ret4 := fibo2(~n - 1);< 12431#$Ultimate##0 ~n := #in~n; 12443#L20 assume !(~n < 1); 12442#L22 assume 1 == ~n;#res := 1; 12439#fibo2FINAL assume true; 12429#fibo2EXIT >#52#return; 12424#L15-1 call #t~ret5 := fibo2(~n - 2);< 12425#$Ultimate##0 ~n := #in~n; 12438#L20 assume ~n < 1;#res := 0; 12428#fibo2FINAL assume true; 12423#fibo2EXIT >#54#return; 12419#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 12416#fibo1FINAL assume true; 12411#fibo1EXIT >#48#return; 12408#L25-1 call #t~ret7 := fibo1(~n - 2);< 12410#$Ultimate##0 ~n := #in~n; 12475#L10 assume !(~n < 1); 12472#L12 assume 1 == ~n;#res := 1; 12473#fibo1FINAL assume true; 12407#fibo1EXIT >#50#return; 12384#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 12386#fibo2FINAL assume true; 12635#fibo2EXIT >#52#return; 12455#L15-1 [2023-11-19 07:57:51,915 INFO L750 eck$LassoCheckResult]: Loop: 12455#L15-1 call #t~ret5 := fibo2(~n - 2);< 12466#$Ultimate##0 ~n := #in~n; 12462#L20 assume !(~n < 1); 12460#L22 assume !(1 == ~n); 12447#L25 call #t~ret6 := fibo1(~n - 1);< 12457#$Ultimate##0 ~n := #in~n; 12552#L10 assume !(~n < 1); 12551#L12 assume 1 == ~n;#res := 1; 12550#fibo1FINAL assume true; 12502#fibo1EXIT >#48#return; 12469#L25-1 call #t~ret7 := fibo1(~n - 2);< 12496#$Ultimate##0 ~n := #in~n; 12495#L10 assume !(~n < 1); 12494#L12 assume !(1 == ~n); 12456#L15 call #t~ret4 := fibo2(~n - 1);< 12464#$Ultimate##0 ~n := #in~n; 12465#L20 assume !(~n < 1); 12532#L22 assume 1 == ~n;#res := 1; 12528#fibo2FINAL assume true; 12482#fibo2EXIT >#52#return; 12455#L15-1 [2023-11-19 07:57:51,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 1 times [2023-11-19 07:57:51,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:51,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280538224] [2023-11-19 07:57:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:51,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:51,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:51,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -303531802, now seen corresponding path program 1 times [2023-11-19 07:57:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870997408] [2023-11-19 07:57:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:57:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:57:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:57:51,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870997408] [2023-11-19 07:57:51,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870997408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933624249] [2023-11-19 07:57:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:51,984 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:51,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-19 07:57:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:57:52,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:52,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:57:52,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933624249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:52,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:52,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-19 07:57:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349105166] [2023-11-19 07:57:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:52,127 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:57:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:52,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:57:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:57:52,128 INFO L87 Difference]: Start difference. First operand 482 states and 549 transitions. cyclomatic complexity: 81 Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:57:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:52,195 INFO L93 Difference]: Finished difference Result 326 states and 353 transitions. [2023-11-19 07:57:52,196 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 326 states and 353 transitions. [2023-11-19 07:57:52,199 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-19 07:57:52,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 326 states to 271 states and 298 transitions. [2023-11-19 07:57:52,203 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147 [2023-11-19 07:57:52,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2023-11-19 07:57:52,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 298 transitions. [2023-11-19 07:57:52,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:52,204 INFO L218 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 07:57:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 298 transitions. [2023-11-19 07:57:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2023-11-19 07:57:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 196 states have internal predecessors, (200), 56 states have call successors, (57), 44 states have call predecessors, (57), 34 states have return successors, (41), 30 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-19 07:57:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 298 transitions. [2023-11-19 07:57:52,211 INFO L240 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 07:57:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:57:52,212 INFO L428 stractBuchiCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 07:57:52,212 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-19 07:57:52,213 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 271 states and 298 transitions. [2023-11-19 07:57:52,215 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-19 07:57:52,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:52,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:52,216 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:52,216 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:52,216 INFO L748 eck$LassoCheckResult]: Stem: 13352#$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(18, 2);call #Ultimate.allocInit(12, 3); 13325#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 13326#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 13354#$Ultimate##0 ~n := #in~n; 13388#L10 assume !(~n < 1); 13386#L12 assume !(1 == ~n); 13339#L15 call #t~ret4 := fibo2(~n - 1);< 13380#$Ultimate##0 ~n := #in~n; 13375#L20 assume !(~n < 1); 13371#L22 assume !(1 == ~n); 13366#L25 call #t~ret6 := fibo1(~n - 1);< 13368#$Ultimate##0 ~n := #in~n; 13390#L10 assume !(~n < 1); 13393#L12 assume !(1 == ~n); 13383#L15 call #t~ret4 := fibo2(~n - 1);< 13384#$Ultimate##0 ~n := #in~n; 13395#L20 assume !(~n < 1); 13394#L22 assume 1 == ~n;#res := 1; 13392#fibo2FINAL assume true; 13382#fibo2EXIT >#52#return; 13377#L15-1 call #t~ret5 := fibo2(~n - 2);< 13378#$Ultimate##0 ~n := #in~n; 13391#L20 assume ~n < 1;#res := 0; 13381#fibo2FINAL assume true; 13376#fibo2EXIT >#54#return; 13372#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 13369#fibo1FINAL assume true; 13364#fibo1EXIT >#48#return; 13361#L25-1 call #t~ret7 := fibo1(~n - 2);< 13362#$Ultimate##0 ~n := #in~n; 13435#L10 assume !(~n < 1); 13434#L12 assume !(1 == ~n); 13431#L15 call #t~ret4 := fibo2(~n - 1);< 13433#$Ultimate##0 ~n := #in~n; 13444#L20 assume !(~n < 1); 13442#L22 assume 1 == ~n;#res := 1; 13443#fibo2FINAL assume true; 13430#fibo2EXIT >#52#return; 13404#L15-1 [2023-11-19 07:57:52,216 INFO L750 eck$LassoCheckResult]: Loop: 13404#L15-1 call #t~ret5 := fibo2(~n - 2);< 13415#$Ultimate##0 ~n := #in~n; 13411#L20 assume !(~n < 1); 13408#L22 assume !(1 == ~n); 13398#L25 call #t~ret6 := fibo1(~n - 1);< 13405#$Ultimate##0 ~n := #in~n; 13420#L10 assume !(~n < 1); 13418#L12 assume !(1 == ~n); 13403#L15 call #t~ret4 := fibo2(~n - 1);< 13413#$Ultimate##0 ~n := #in~n; 13414#L20 assume !(~n < 1); 13452#L22 assume 1 == ~n;#res := 1; 13447#fibo2FINAL assume true; 13432#fibo2EXIT >#52#return; 13404#L15-1 [2023-11-19 07:57:52,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash 794867286, now seen corresponding path program 1 times [2023-11-19 07:57:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:52,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593622781] [2023-11-19 07:57:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:52,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:57:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:57:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 07:57:52,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:52,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593622781] [2023-11-19 07:57:52,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593622781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071395807] [2023-11-19 07:57:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:52,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:52,328 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:52,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-19 07:57:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:57:52,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:57:52,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:57:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071395807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:52,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2023-11-19 07:57:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000670491] [2023-11-19 07:57:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:52,589 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:57:52,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2023-11-19 07:57:52,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:52,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987260055] [2023-11-19 07:57:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:52,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:52,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:52,784 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:52,785 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:52,785 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:52,785 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:52,785 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:52,785 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:52,785 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:52,785 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:52,785 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration8_Loop [2023-11-19 07:57:52,785 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:52,785 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:52,786 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,791 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,793 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,795 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,798 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,800 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,802 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,803 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,810 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,858 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:52,858 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:52,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:52,863 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-19 07:57:52,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:52,865 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:52,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:52,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:52,888 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:52,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-19 07:57:52,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:52,890 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:52,903 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:52,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Ended with exit code 0 [2023-11-19 07:57:52,916 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:52,916 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:52,916 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:52,916 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:52,916 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:52,916 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:52,916 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:52,916 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:52,916 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration8_Loop [2023-11-19 07:57:52,916 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:52,916 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:52,917 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,929 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,931 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,934 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,936 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,939 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,941 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,944 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:52,947 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:53,010 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:53,011 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:53,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:53,012 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:53,017 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 [2023-11-19 07:57:53,029 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:53,029 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:53,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:53,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:53,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:53,030 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:53,030 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:53,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-19 07:57:53,040 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:53,045 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 07:57:53,045 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:57:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:53,047 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:53,049 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:53,049 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:53,049 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:53,049 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 07:57:53,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2023-11-19 07:57:53,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:53,067 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:53,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:53,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:53,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:57:53,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:53,496 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-19 07:57:53,496 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:53,830 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 422 states and 463 transitions. Complement of second has 40 states. [2023-11-19 07:57:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 50 transitions. [2023-11-19 07:57:53,835 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 50 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 07:57:53,835 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:53,835 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:53,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:53,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:53,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:54,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:54,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:57:54,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:54,308 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-19 07:57:54,308 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:54,553 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 344 states and 375 transitions. Complement of second has 26 states. [2023-11-19 07:57:54,553 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 [2023-11-19 07:57:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2023-11-19 07:57:54,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 07:57:54,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:54,555 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:54,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:54,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:54,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:54,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:57:54,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:54,977 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 8 loop predicates [2023-11-19 07:57:54,978 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:55,328 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 1102 states and 1208 transitions. Complement of second has 102 states. [2023-11-19 07:57:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:57:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 61 transitions. [2023-11-19 07:57:55,330 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 07:57:55,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:55,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 52 letters. Loop has 14 letters. [2023-11-19 07:57:55,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:55,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 28 letters. [2023-11-19 07:57:55,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:55,333 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1102 states and 1208 transitions. [2023-11-19 07:57:55,342 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 162 [2023-11-19 07:57:55,347 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1102 states to 538 states and 595 transitions. [2023-11-19 07:57:55,348 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 252 [2023-11-19 07:57:55,348 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2023-11-19 07:57:55,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 595 transitions. [2023-11-19 07:57:55,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:55,349 INFO L218 hiAutomatonCegarLoop]: Abstraction has 538 states and 595 transitions. [2023-11-19 07:57:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 595 transitions. [2023-11-19 07:57:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 419. [2023-11-19 07:57:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 281 states have (on average 1.092526690391459) internal successors, (307), 301 states have internal predecessors, (307), 82 states have call successors, (87), 70 states have call predecessors, (87), 56 states have return successors, (62), 47 states have call predecessors, (62), 61 states have call successors, (62) [2023-11-19 07:57:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 456 transitions. [2023-11-19 07:57:55,361 INFO L240 hiAutomatonCegarLoop]: Abstraction has 419 states and 456 transitions. [2023-11-19 07:57:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:57:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:57:55,362 INFO L87 Difference]: Start difference. First operand 419 states and 456 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 07:57:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:55,486 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2023-11-19 07:57:55,486 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 241 transitions. [2023-11-19 07:57:55,513 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-19 07:57:55,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 83 states and 86 transitions. [2023-11-19 07:57:55,514 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2023-11-19 07:57:55,514 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2023-11-19 07:57:55,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 86 transitions. [2023-11-19 07:57:55,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:57:55,514 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 86 transitions. [2023-11-19 07:57:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 86 transitions. [2023-11-19 07:57:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2023-11-19 07:57:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 13 states have call successors, (13), 12 states have call predecessors, (13), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:57:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-19 07:57:55,516 INFO L240 hiAutomatonCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-19 07:57:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:57:55,518 INFO L428 stractBuchiCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-19 07:57:55,518 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-19 07:57:55,519 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 66 states and 68 transitions. [2023-11-19 07:57:55,519 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-19 07:57:55,519 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:57:55,519 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:57:55,521 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:55,521 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 07:57:55,522 INFO L748 eck$LassoCheckResult]: Stem: 17104#$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(18, 2);call #Ultimate.allocInit(12, 3); 17091#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 17092#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 17105#$Ultimate##0 ~n := #in~n; 17120#L10 assume !(~n < 1); 17117#L12 assume !(1 == ~n); 17083#L15 call #t~ret4 := fibo2(~n - 1);< 17113#$Ultimate##0 ~n := #in~n; 17111#L20 assume !(~n < 1); 17109#L22 assume !(1 == ~n); 17087#L25 call #t~ret6 := fibo1(~n - 1);< 17086#$Ultimate##0 ~n := #in~n; 17088#L10 assume !(~n < 1); 17095#L12 assume !(1 == ~n); 17076#L15 call #t~ret4 := fibo2(~n - 1);< 17075#$Ultimate##0 ~n := #in~n; 17077#L20 assume !(~n < 1); 17103#L22 assume 1 == ~n;#res := 1; 17122#fibo2FINAL assume true; 17119#fibo2EXIT >#52#return; 17115#L15-1 call #t~ret5 := fibo2(~n - 2);< 17116#$Ultimate##0 ~n := #in~n; 17121#L20 assume ~n < 1;#res := 0; 17118#fibo2FINAL assume true; 17114#fibo2EXIT >#54#return; 17106#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 17107#fibo1FINAL assume true; 17108#fibo1EXIT >#48#return; 17081#L25-1 call #t~ret7 := fibo1(~n - 2);< 17084#$Ultimate##0 ~n := #in~n; 17112#L10 assume !(~n < 1); 17110#L12 assume 1 == ~n;#res := 1; 17080#fibo1FINAL assume true; 17082#fibo1EXIT >#50#return; 17085#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 17093#fibo2FINAL assume true; 17099#fibo2EXIT >#52#return; 17072#L15-1 [2023-11-19 07:57:55,522 INFO L750 eck$LassoCheckResult]: Loop: 17072#L15-1 call #t~ret5 := fibo2(~n - 2);< 17078#$Ultimate##0 ~n := #in~n; 17079#L20 assume !(~n < 1); 17071#L22 assume !(1 == ~n); 17074#L25 call #t~ret6 := fibo1(~n - 1);< 17089#$Ultimate##0 ~n := #in~n; 17090#L10 assume !(~n < 1); 17096#L12 assume !(1 == ~n); 17097#L15 call #t~ret4 := fibo2(~n - 1);< 17102#$Ultimate##0 ~n := #in~n; 17125#L20 assume !(~n < 1); 17132#L22 assume !(1 == ~n); 17094#L25 call #t~ret6 := fibo1(~n - 1);< 17131#$Ultimate##0 ~n := #in~n; 17130#L10 assume !(~n < 1); 17128#L12 assume !(1 == ~n); 17069#L15 call #t~ret4 := fibo2(~n - 1);< 17124#$Ultimate##0 ~n := #in~n; 17123#L20 assume !(~n < 1); 17068#L22 assume 1 == ~n;#res := 1; 17070#fibo2FINAL assume true; 17133#fibo2EXIT >#52#return; 17072#L15-1 [2023-11-19 07:57:55,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 2 times [2023-11-19 07:57:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83473800] [2023-11-19 07:57:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:55,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:55,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:55,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 878078665, now seen corresponding path program 2 times [2023-11-19 07:57:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347027857] [2023-11-19 07:57:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:55,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:55,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:55,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1575530616, now seen corresponding path program 3 times [2023-11-19 07:57:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133835672] [2023-11-19 07:57:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:57:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:57:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:57:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:57:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-19 07:57:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 07:57:55,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133835672] [2023-11-19 07:57:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133835672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349529513] [2023-11-19 07:57:55,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:57:55,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:55,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:55,685 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:55,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-19 07:57:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:57:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:55,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:55,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:57:55,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:57:56,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349529513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:56,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:56,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 24 [2023-11-19 07:57:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736018732] [2023-11-19 07:57:56,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:56,395 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:56,396 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:56,396 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:56,396 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:56,396 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:57:56,396 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,396 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:56,397 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:56,397 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration9_Loop [2023-11-19 07:57:56,397 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:56,397 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:56,398 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,403 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,406 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,409 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,411 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,414 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,422 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,424 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,426 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,476 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:56,476 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:57:56,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:56,479 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:56,490 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:57:56,490 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:56,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2023-11-19 07:57:56,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2023-11-19 07:57:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:56,523 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:56,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2023-11-19 07:57:56,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:57:56,524 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:57:56,537 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:57:56,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2023-11-19 07:57:56,549 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:57:56,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:57:56,550 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:57:56,550 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:57:56,550 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:57:56,550 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,550 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:57:56,550 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:57:56,550 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-1.c_Iteration9_Loop [2023-11-19 07:57:56,550 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:57:56,550 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:57:56,551 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,555 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,558 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,560 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,562 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,565 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,569 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,572 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,574 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:57:56,633 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:57:56,634 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:57:56,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:56,636 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:56,640 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 [2023-11-19 07:57:56,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:57:56,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:57:56,653 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:57:56,653 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:57:56,653 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:57:56,656 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:57:56,656 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:57:56,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2023-11-19 07:57:56,670 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:57:56,673 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 07:57:56,673 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:57:56,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:57:56,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:56,675 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:56,676 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:57:56,676 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:57:56,677 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:57:56,677 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 07:57:56,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2023-11-19 07:57:56,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:56,695 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:57:56,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:56,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:56,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:56,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:57,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:57:57,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:57,252 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 12 loop predicates [2023-11-19 07:57:57,253 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:57,372 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 73 states and 75 transitions. Complement of second has 11 states. [2023-11-19 07:57:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-19 07:57:57,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 07:57:57,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:57,374 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:57,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:57,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:57,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:57,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:57:57,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:57,905 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 12 loop predicates [2023-11-19 07:57:57,905 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:58,024 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 73 states and 75 transitions. Complement of second has 11 states. [2023-11-19 07:57:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-19 07:57:58,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 07:57:58,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:58,026 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:58,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:58,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:58,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:58,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:57:58,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:58,568 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 12 loop predicates [2023-11-19 07:57:58,568 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:58,905 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 192 states and 200 transitions. Complement of second has 91 states. [2023-11-19 07:57:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 53 transitions. [2023-11-19 07:57:58,907 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 07:57:58,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:58,910 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:57:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:58,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:57:58,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:59,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:57:59,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:59,459 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 12 loop predicates [2023-11-19 07:57:59,459 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:59,969 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 107 states and 112 transitions. Complement of second has 35 states. [2023-11-19 07:57:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2023-11-19 07:57:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:57:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 51 transitions. [2023-11-19 07:57:59,970 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 07:57:59,971 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:59,971 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 59 letters. Loop has 22 letters. [2023-11-19 07:57:59,971 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:59,971 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 44 letters. [2023-11-19 07:57:59,972 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:57:59,972 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 107 states and 112 transitions. [2023-11-19 07:57:59,973 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:57:59,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 107 states to 0 states and 0 transitions. [2023-11-19 07:57:59,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 07:57:59,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 07:57:59,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 07:57:59,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:59,974 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:57:59,974 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:57:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:57:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:57:59,975 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 16 states have internal predecessors, (54), 12 states have call successors, (20), 10 states have call predecessors, (20), 2 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-19 07:57:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:59,976 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-11-19 07:57:59,976 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-11-19 07:57:59,976 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:57:59,976 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 07:57:59,976 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 07:57:59,976 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 07:57:59,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 07:57:59,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:59,977 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:57:59,977 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:57:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:57:59,977 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:57:59,977 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-11-19 07:57:59,978 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:57:59,978 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:57:59,978 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-19 07:57:59,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:57:59 BoogieIcfgContainer [2023-11-19 07:57:59,985 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 07:57:59,986 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:57:59,986 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:57:59,987 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:57:59,987 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:37" (3/4) ... [2023-11-19 07:57:59,989 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:57:59,990 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:57:59,991 INFO L158 Benchmark]: Toolchain (without parser) took 23455.29ms. Allocated memory was 176.2MB in the beginning and 255.9MB in the end (delta: 79.7MB). Free memory was 128.9MB in the beginning and 87.1MB in the end (delta: 41.8MB). Peak memory consumption was 122.1MB. Max. memory is 16.1GB. [2023-11-19 07:57:59,991 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 176.2MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:57:59,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.56ms. Allocated memory is still 176.2MB. Free memory was 128.9MB in the beginning and 118.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:57:59,992 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.56ms. Allocated memory is still 176.2MB. Free memory was 118.4MB in the beginning and 117.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:57:59,993 INFO L158 Benchmark]: Boogie Preprocessor took 21.70ms. Allocated memory is still 176.2MB. Free memory was 117.1MB in the beginning and 116.3MB in the end (delta: 820.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:57:59,993 INFO L158 Benchmark]: RCFGBuilder took 382.22ms. Allocated memory is still 176.2MB. Free memory was 116.3MB in the beginning and 105.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:57:59,993 INFO L158 Benchmark]: BuchiAutomizer took 22713.08ms. Allocated memory was 176.2MB in the beginning and 255.9MB in the end (delta: 79.7MB). Free memory was 105.8MB in the beginning and 87.1MB in the end (delta: 18.7MB). Peak memory consumption was 99.0MB. Max. memory is 16.1GB. [2023-11-19 07:57:59,994 INFO L158 Benchmark]: Witness Printer took 4.47ms. Allocated memory is still 255.9MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:57:59,995 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 176.2MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.56ms. Allocated memory is still 176.2MB. Free memory was 128.9MB in the beginning and 118.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.56ms. Allocated memory is still 176.2MB. Free memory was 118.4MB in the beginning and 117.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.70ms. Allocated memory is still 176.2MB. Free memory was 117.1MB in the beginning and 116.3MB in the end (delta: 820.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 382.22ms. Allocated memory is still 176.2MB. Free memory was 116.3MB in the beginning and 105.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 22713.08ms. Allocated memory was 176.2MB in the beginning and 255.9MB in the end (delta: 79.7MB). Free memory was 105.8MB in the beginning and 87.1MB in the end (delta: 18.7MB). Peak memory consumption was 99.0MB. Max. memory is 16.1GB. * Witness Printer took 4.47ms. Allocated memory is still 255.9MB. Free memory is still 87.1MB. 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 14 terminating modules (8 trivial, 3 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 13 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function n and consists of 14 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 22.6s and 10 iterations. TraceHistogramMax:8. Analysis of lassos took 10.8s. Construction of modules took 1.9s. Büchi inclusion checks took 9.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 516 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 9/33 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 959 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 928 mSDsluCounter, 1503 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1041 mSDsCounter, 443 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2477 IncrementalHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 443 mSolverCounterUnsat, 462 mSDtfsCounter, 2477 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf90 smp82 dnf100 smp100 tf113 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 40ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 22 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-19 07:58:00,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-19 07:58:00,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:00,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:00,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:00,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-19 07:58:01,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-19 07:58:01,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-19 07:58:01,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:01,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f34fc4a-5cd5-4449-a301-6b2f2dbfaaec/bin/uautomizer-verify-uCwYo4JHxu/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