./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.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_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/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_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/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_17637de4-60f4-4b99-98f7-d2f38f797ef5/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 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:25,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:25,721 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-19 08:06:25,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:25,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:25,779 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:25,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:25,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:25,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:25,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:25,792 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:25,793 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 08:06:25,793 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 08:06:25,796 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 08:06:25,796 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 08:06:25,797 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 08:06:25,798 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 08:06:25,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:25,799 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 08:06:25,800 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:25,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:25,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:25,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:25,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 08:06:25,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 08:06:25,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 08:06:25,804 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:06:25,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:25,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:25,806 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 08:06:25,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:25,808 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:25,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:25,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:25,810 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:25,810 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 08:06:25,811 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_17637de4-60f4-4b99-98f7-d2f38f797ef5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f [2023-11-19 08:06:26,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:26,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:26,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:26,302 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:26,302 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:26,304 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2023-11-19 08:06:29,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:30,071 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:30,072 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2023-11-19 08:06:30,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/data/bc7d985f8/b58bc315a7e24cb092476ce2f78268f3/FLAGa03be3037 [2023-11-19 08:06:30,416 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/data/bc7d985f8/b58bc315a7e24cb092476ce2f78268f3 [2023-11-19 08:06:30,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:30,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:30,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:30,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:30,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:30,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20489310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30, skipping insertion in model container [2023-11-19 08:06:30,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:30,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:30,692 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:30,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:30,727 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:30,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30 WrapperNode [2023-11-19 08:06:30,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:30,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:30,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:30,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:30,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,769 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-19 08:06:30,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:30,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:30,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:30,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:30,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:30,798 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:30,798 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:30,798 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:30,799 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:30,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:30,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:30,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:30,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:30,883 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-19 08:06:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-19 08:06:30,884 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-19 08:06:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-19 08:06:30,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:30,956 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:30,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:31,165 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:31,189 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:31,189 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 08:06:31,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:31 BoogieIcfgContainer [2023-11-19 08:06:31,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:31,207 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 08:06:31,207 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 08:06:31,212 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 08:06:31,213 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:06:31,214 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 08:06:30" (1/3) ... [2023-11-19 08:06:31,215 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7ba945f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 08:06:31, skipping insertion in model container [2023-11-19 08:06:31,217 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:06:31,218 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (2/3) ... [2023-11-19 08:06:31,219 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7ba945f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 08:06:31, skipping insertion in model container [2023-11-19 08:06:31,219 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:06:31,219 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:31" (3/3) ... [2023-11-19 08:06:31,221 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_4-2.c [2023-11-19 08:06:31,309 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 08:06:31,309 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 08:06:31,310 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 08:06:31,310 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 08:06:31,310 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 08:06:31,310 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 08:06:31,311 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 08:06:31,311 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 08:06:31,317 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 08:06:31,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:31,354 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:31,355 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:31,364 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 08:06:31,364 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,364 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 08:06:31,365 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 08:06:31,373 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:31,374 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:31,374 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:31,375 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 08:06:31,375 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,385 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 08:06:31,385 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 08:06:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2023-11-19 08:06:31,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825493129] [2023-11-19 08:06:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,532 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:31,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2023-11-19 08:06:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906377299] [2023-11-19 08:06:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2023-11-19 08:06:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045475142] [2023-11-19 08:06:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:31,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:31,954 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:31,955 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:31,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:31,956 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:31,956 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:31,956 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:31,957 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:31,957 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:31,957 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration1_Loop [2023-11-19 08:06:31,957 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:31,958 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:31,979 INFO 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 08:06:31,991 INFO 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 08:06:31,995 INFO 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 08:06:31,999 INFO 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 08:06:32,003 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 08:06:32,007 INFO 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 08:06:32,011 INFO 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 08:06:32,015 INFO 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 08:06:32,121 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:32,122 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:32,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,142 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,142 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 08:06:32,171 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,171 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 08:06:32,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,206 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 08:06:32,236 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,236 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 08:06:32,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 08:06:32,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,279 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,279 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 08:06:32,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 08:06:32,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,321 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,321 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 08:06:32,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 08:06:32,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,354 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,388 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,388 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 08:06:32,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,426 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 08:06:32,441 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,442 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 08:06:32,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 08:06:32,466 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,466 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,483 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:32,483 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 08:06:32,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2023-11-19 08:06:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 08:06:32,505 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:32,505 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 08:06:32,548 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:32,548 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:32,668 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:32,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,679 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:32,679 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:32,679 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:32,680 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:32,680 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:32,680 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,680 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:32,680 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:32,680 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration1_Loop [2023-11-19 08:06:32,681 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:32,681 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:32,683 INFO 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 08:06:32,690 INFO 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 08:06:32,697 INFO 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 08:06:32,701 INFO 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 08:06:32,704 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 08:06:32,708 INFO 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 08:06:32,753 INFO 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 08:06:32,756 INFO 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 08:06:32,851 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:32,857 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:32,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,877 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 08:06:32,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 08:06:32,894 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:32,894 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:32,895 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:32,895 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:32,895 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:32,898 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:32,898 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:32,916 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:32,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:32,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:32,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,960 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 08:06:32,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-19 08:06:32,975 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:32,975 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:32,976 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:32,976 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:32,976 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:32,977 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:32,977 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:32,987 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:33,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:33,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:33,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:33,038 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 08:06:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 08:06:33,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:33,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:33,056 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:33,056 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:33,056 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:33,057 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:33,057 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:33,067 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:33,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:33,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:33,105 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 08:06:33,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 08:06:33,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:33,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:33,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:33,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:33,117 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:33,119 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:33,119 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:33,121 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:33,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2023-11-19 08:06:33,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:33,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:33,143 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:33,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 08:06:33,145 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 08:06:33,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:33,158 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:33,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:33,159 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:33,159 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:33,159 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:33,160 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:33,183 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:33,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:33,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:33,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:33,214 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:33,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 08:06:33,221 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 08:06:33,239 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:33,239 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:33,239 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:33,239 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:33,239 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:33,241 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:33,241 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:33,259 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:33,275 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 08:06:33,276 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 08:06:33,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:33,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:33,316 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:33,317 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:33,317 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:33,317 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2023-11-19 08:06:33,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 08:06:33,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:33,359 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:33,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:33,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:06:33,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:33,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:33,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:33,611 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 08:06:33,668 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 08:06:33,671 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 08:06:33,990 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 08:06:33,993 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 08:06:33,999 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 08:06:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2023-11-19 08:06:34,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-19 08:06:34,004 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:34,004 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-19 08:06:34,005 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:34,005 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2023-11-19 08:06:34,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:34,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2023-11-19 08:06:34,015 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:34,025 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2023-11-19 08:06:34,026 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-11-19 08:06:34,027 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-11-19 08:06:34,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2023-11-19 08:06:34,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:34,030 INFO L218 hiAutomatonCegarLoop]: Abstraction has 61 states and 82 transitions. [2023-11-19 08:06:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2023-11-19 08:06:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2023-11-19 08:06:34,072 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 08:06:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-11-19 08:06:34,076 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-19 08:06:34,076 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-19 08:06:34,076 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 08:06:34,077 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2023-11-19 08:06:34,079 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:34,079 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:34,079 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:34,081 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,081 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,082 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#$Ultimate##0 ~n := #in~n; 222#L10 assume ~n < 1;#res := 0; 209#fibo1FINAL assume true; 210#fibo1EXIT >#48#return; 211#L25-1 [2023-11-19 08:06:34,082 INFO L750 eck$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 08:06:34,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2023-11-19 08:06:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407684745] [2023-11-19 08:06:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 08:06:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,332 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 08:06:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407684745] [2023-11-19 08:06:34,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407684745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:34,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:34,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:06:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650252785] [2023-11-19 08:06:34,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:34,340 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:34,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2023-11-19 08:06:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:34,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077027495] [2023-11-19 08:06:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:34,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 08:06:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,525 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 08:06:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077027495] [2023-11-19 08:06:34,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077027495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:34,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:34,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:06:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098441285] [2023-11-19 08:06:34,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:34,527 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 08:06:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:06:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:34,533 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 08:06:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:34,655 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-19 08:06:34,656 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2023-11-19 08:06:34,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:34,677 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2023-11-19 08:06:34,679 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2023-11-19 08:06:34,681 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-19 08:06:34,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2023-11-19 08:06:34,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:34,683 INFO L218 hiAutomatonCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-19 08:06:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2023-11-19 08:06:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-11-19 08:06:34,693 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 08:06:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-19 08:06:34,695 INFO L240 hiAutomatonCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-19 08:06:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:34,696 INFO L428 stractBuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-19 08:06:34,697 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 08:06:34,697 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2023-11-19 08:06:34,699 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-19 08:06:34,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:34,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:34,700 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,700 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,701 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 08:06:34,701 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 08:06:34,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2023-11-19 08:06:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452891565] [2023-11-19 08:06:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:34,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 08:06:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,957 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 08:06:34,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452891565] [2023-11-19 08:06:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452891565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97337385] [2023-11-19 08:06:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:34,964 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 08:06:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:35,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:35,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:35,101 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 08:06:35,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:35,268 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 08:06:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97337385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:35,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-11-19 08:06:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670292416] [2023-11-19 08:06:35,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:35,271 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:35,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2023-11-19 08:06:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:35,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106513242] [2023-11-19 08:06:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:35,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:35,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:35,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,621 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:35,621 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:35,622 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:35,622 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:35,622 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:35,622 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,622 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:35,622 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:35,623 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration3_Loop [2023-11-19 08:06:35,623 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:35,623 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:35,627 INFO 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 08:06:35,631 INFO 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 08:06:35,634 INFO 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 08:06:35,637 INFO 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 08:06:35,640 INFO 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 08:06:35,644 INFO 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 08:06:35,651 INFO 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 08:06:35,654 INFO 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 08:06:35,657 INFO 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 08:06:35,725 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:35,725 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:35,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:35,735 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:35,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 08:06:35,760 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:35,760 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 08:06:35,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 08:06:35,804 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:35,804 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:35,834 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:35,834 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 08:06:35,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:35,874 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:35,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 08:06:35,904 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:35,904 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 08:06:35,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,934 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 08:06:35,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:35,940 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:35,965 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:35,965 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 08:06:35,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,987 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 08:06:35,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:35,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:36,006 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:36,006 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 08:06:36,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,025 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,027 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:36,027 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:36,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-19 08:06:36,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,062 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 08:06:36,063 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:36,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:36,091 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:36,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,107 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:36,107 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:36,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:36,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:36,108 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:36,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,108 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:36,108 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:36,108 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration3_Loop [2023-11-19 08:06:36,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:36,109 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:36,110 INFO 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 08:06:36,117 INFO 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 08:06:36,125 INFO 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 08:06:36,128 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:36,131 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:36,138 INFO 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 08:06:36,144 INFO 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 08:06:36,148 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:36,152 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:36,223 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:36,224 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:36,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,225 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,235 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 08:06:36,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 08:06:36,251 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:36,251 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:36,252 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:36,252 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:36,252 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:36,253 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:36,253 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:36,263 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:36,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,288 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 08:06:36,290 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 08:06:36,302 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:36,302 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:36,302 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:36,302 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:36,302 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:36,307 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:36,307 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:36,309 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:36,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2023-11-19 08:06:36,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,326 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 08:06:36,328 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 08:06:36,340 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:36,340 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:36,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:36,341 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:36,341 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:36,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:36,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:36,364 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:36,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,394 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,400 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 08:06:36,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 08:06:36,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:36,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:36,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:36,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:36,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:36,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:36,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:36,435 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:36,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,465 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,468 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 08:06:36,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 08:06:36,483 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:36,483 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:36,483 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:36,483 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:36,483 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:36,485 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:36,485 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:36,507 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:36,512 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 08:06:36,512 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 08:06:36,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:36,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:36,519 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:36,521 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:36,521 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:36,522 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:36,522 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2023-11-19 08:06:36,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-19 08:06:36,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,550 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:36,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:36,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:36,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:36,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:06:36,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:36,924 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 08:06:36,925 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 08:06:36,926 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 08:06:37,569 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 08:06:37,570 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 08:06:37,571 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 08:06:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2023-11-19 08:06:37,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2023-11-19 08:06:37,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:37,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2023-11-19 08:06:37,574 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:37,574 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2023-11-19 08:06:37,575 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:37,575 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2023-11-19 08:06:37,583 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 08:06:37,590 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2023-11-19 08:06:37,591 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2023-11-19 08:06:37,592 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2023-11-19 08:06:37,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2023-11-19 08:06:37,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:37,594 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 237 transitions. [2023-11-19 08:06:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2023-11-19 08:06:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2023-11-19 08:06:37,621 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 08:06:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2023-11-19 08:06:37,629 INFO L240 hiAutomatonCegarLoop]: Abstraction has 152 states and 206 transitions. [2023-11-19 08:06:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:06:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:06:37,631 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 08:06:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:37,819 INFO L93 Difference]: Finished difference Result 183 states and 247 transitions. [2023-11-19 08:06:37,819 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 247 transitions. [2023-11-19 08:06:37,831 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 08:06:37,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 243 transitions. [2023-11-19 08:06:37,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2023-11-19 08:06:37,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2023-11-19 08:06:37,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 243 transitions. [2023-11-19 08:06:37,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:37,852 INFO L218 hiAutomatonCegarLoop]: Abstraction has 180 states and 243 transitions. [2023-11-19 08:06:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 243 transitions. [2023-11-19 08:06:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2023-11-19 08:06:37,885 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 08:06:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2023-11-19 08:06:37,891 INFO L240 hiAutomatonCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-19 08:06:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:06:37,895 INFO L428 stractBuchiCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-19 08:06:37,895 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 08:06:37,895 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 165 states and 225 transitions. [2023-11-19 08:06:37,903 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-19 08:06:37,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:37,904 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:37,907 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 08:06:37,908 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:37,909 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 08:06:37,909 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 08:06:37,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1873386980, now seen corresponding path program 1 times [2023-11-19 08:06:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:37,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244293542] [2023-11-19 08:06:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 08:06:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:38,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 08:06:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 08:06:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,208 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 08:06:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244293542] [2023-11-19 08:06:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244293542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:38,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695141345] [2023-11-19 08:06:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:38,212 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:38,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-19 08:06:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:38,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:38,415 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 08:06:38,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:38,901 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 08:06:38,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695141345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:38,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:38,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 16 [2023-11-19 08:06:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162318887] [2023-11-19 08:06:38,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:38,903 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:38,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2023-11-19 08:06:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:38,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311369236] [2023-11-19 08:06:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:38,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:38,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:38,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:39,055 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:39,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:39,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:39,056 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:39,056 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:39,056 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,056 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:39,056 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:39,056 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration4_Loop [2023-11-19 08:06:39,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:39,057 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:39,058 INFO 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 08:06:39,061 INFO 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 08:06:39,064 INFO 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 08:06:39,068 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 08:06:39,071 INFO 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 08:06:39,074 INFO 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 08:06:39,077 INFO 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 08:06:39,090 INFO 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 08:06:39,161 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:39,161 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:39,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,163 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,166 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-19 08:06:39,199 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,200 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 08:06:39,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,230 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,233 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-19 08:06:39,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,276 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 08:06:39,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,300 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-19 08:06:39,342 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,342 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 08:06:39,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,361 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,364 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,364 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-19 08:06:39,391 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,392 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 08:06:39,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,411 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-19 08:06:39,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,413 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,432 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 08:06:39,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2023-11-19 08:06:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,449 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-19 08:06:39,451 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,451 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,462 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:39,462 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 08:06:39,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2023-11-19 08:06:39,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,478 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:39,479 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-19 08:06:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,507 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:39,510 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:39,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-19 08:06:39,580 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:39,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,584 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:39,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:39,584 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:39,584 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:39,584 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:39,584 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,584 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:39,584 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:39,584 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration4_Loop [2023-11-19 08:06:39,584 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:39,584 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:39,585 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:39,589 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:39,592 INFO 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 08:06:39,595 INFO 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 08:06:39,597 INFO 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 08:06:39,599 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:39,601 INFO 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 08:06:39,603 INFO 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 08:06:39,672 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:39,673 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:39,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,676 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,678 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 08:06:39,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,691 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,691 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,691 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,692 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,692 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-19 08:06:39,711 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,736 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,740 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 08:06:39,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,753 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,753 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,753 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,754 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-19 08:06:39,763 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,783 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,788 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 08:06:39,800 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,800 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,800 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,801 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,801 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,801 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,801 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-19 08:06:39,813 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,834 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,840 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 08:06:39,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-19 08:06:39,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,875 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,895 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-19 08:06:39,898 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 08:06:39,908 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,909 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,909 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,909 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,909 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,909 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,910 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,911 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,929 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,932 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 08:06:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-19 08:06:39,943 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:39,943 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:39,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:39,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:39,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:39,944 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:39,944 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:39,975 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:39,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:39,996 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:40,000 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 08:06:40,013 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:40,013 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:40,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:40,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:40,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:40,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:40,015 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:40,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-19 08:06:40,027 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:40,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:40,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:40,047 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:40,052 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 08:06:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-19 08:06:40,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:40,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:40,065 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:40,065 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:40,065 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:40,066 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:40,066 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:40,075 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:40,078 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 08:06:40,079 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 08:06:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:40,085 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:40,086 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:40,086 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:40,086 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:40,087 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2023-11-19 08:06:40,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-19 08:06:40,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:40,106 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:40,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:40,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:40,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:40,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:40,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:40,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:40,699 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 08:06:40,700 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 08:06:40,700 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 08:06:41,036 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 08:06:41,037 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 08:06:41,040 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 08:06:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-19 08:06:41,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 08:06:41,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:41,041 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:41,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:41,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:41,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:41,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:41,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:41,572 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 08:06:41,573 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 08:06:41,574 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 08:06:41,782 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 08:06:41,783 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 08:06:41,785 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 08:06:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-19 08:06:41,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 08:06:41,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:41,787 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:41,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:41,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:41,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:42,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:42,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:42,294 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 08:06:42,295 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 08:06:42,295 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 08:06:42,493 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 08:06:42,494 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 08:06:42,495 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 08:06:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2023-11-19 08:06:42,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-19 08:06:42,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:42,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 44 letters. Loop has 8 letters. [2023-11-19 08:06:42,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:42,497 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 16 letters. [2023-11-19 08:06:42,498 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:42,498 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 553 states and 762 transitions. [2023-11-19 08:06:42,507 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 56 [2023-11-19 08:06:42,516 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 553 states to 445 states and 639 transitions. [2023-11-19 08:06:42,516 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 195 [2023-11-19 08:06:42,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2023-11-19 08:06:42,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 445 states and 639 transitions. [2023-11-19 08:06:42,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:42,518 INFO L218 hiAutomatonCegarLoop]: Abstraction has 445 states and 639 transitions. [2023-11-19 08:06:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states and 639 transitions. [2023-11-19 08:06:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 370. [2023-11-19 08:06:42,544 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 08:06:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 507 transitions. [2023-11-19 08:06:42,548 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 507 transitions. [2023-11-19 08:06:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:06:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:06:42,549 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 08:06:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:42,874 INFO L93 Difference]: Finished difference Result 449 states and 635 transitions. [2023-11-19 08:06:42,874 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 449 states and 635 transitions. [2023-11-19 08:06:42,883 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 08:06:42,891 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 449 states to 410 states and 591 transitions. [2023-11-19 08:06:42,891 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2023-11-19 08:06:42,892 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 229 [2023-11-19 08:06:42,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 591 transitions. [2023-11-19 08:06:42,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:42,892 INFO L218 hiAutomatonCegarLoop]: Abstraction has 410 states and 591 transitions. [2023-11-19 08:06:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 591 transitions. [2023-11-19 08:06:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 359. [2023-11-19 08:06:42,909 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 08:06:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2023-11-19 08:06:42,913 INFO L240 hiAutomatonCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-19 08:06:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 08:06:42,914 INFO L428 stractBuchiCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-19 08:06:42,915 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 08:06:42,915 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 496 transitions. [2023-11-19 08:06:42,918 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 08:06:42,918 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:42,918 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:42,922 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 08:06:42,922 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 08:06:42,922 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 08:06:42,923 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 08:06:42,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1302122831, now seen corresponding path program 1 times [2023-11-19 08:06:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122682021] [2023-11-19 08:06:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 08:06:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 08:06:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,115 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 08:06:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122682021] [2023-11-19 08:06:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122682021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165917862] [2023-11-19 08:06:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:43,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:43,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:43,117 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:43,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-19 08:06:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:43,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:43,249 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 08:06:43,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:43,471 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 08:06:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165917862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:43,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:43,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-19 08:06:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501797083] [2023-11-19 08:06:43,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:43,472 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:43,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash -96284739, now seen corresponding path program 1 times [2023-11-19 08:06:43,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:43,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765599633] [2023-11-19 08:06:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:43,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-19 08:06:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 08:06:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 08:06:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-19 08:06:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,840 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 08:06:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765599633] [2023-11-19 08:06:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765599633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150149744] [2023-11-19 08:06:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:43,842 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:43,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-19 08:06:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:43,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:44,022 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 08:06:44,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:44,527 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 08:06:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150149744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:44,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:44,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-19 08:06:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040034781] [2023-11-19 08:06:44,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:44,529 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 08:06:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:44,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:06:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:06:44,530 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 08:06:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:44,722 INFO L93 Difference]: Finished difference Result 387 states and 546 transitions. [2023-11-19 08:06:44,722 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 387 states and 546 transitions. [2023-11-19 08:06:44,728 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 08:06:44,735 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 387 states to 387 states and 546 transitions. [2023-11-19 08:06:44,735 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 209 [2023-11-19 08:06:44,736 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 209 [2023-11-19 08:06:44,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 546 transitions. [2023-11-19 08:06:44,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:44,736 INFO L218 hiAutomatonCegarLoop]: Abstraction has 387 states and 546 transitions. [2023-11-19 08:06:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states and 546 transitions. [2023-11-19 08:06:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 369. [2023-11-19 08:06:44,750 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 08:06:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 508 transitions. [2023-11-19 08:06:44,754 INFO L240 hiAutomatonCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-19 08:06:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:06:44,755 INFO L428 stractBuchiCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-19 08:06:44,755 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 08:06:44,755 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 508 transitions. [2023-11-19 08:06:44,759 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-19 08:06:44,759 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:44,759 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:44,760 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 08:06:44,761 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 08:06:44,761 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#$Ultimate##0 ~n := #in~n; 6966#L10 assume ~n < 1;#res := 0; 6967#fibo1FINAL assume true; 6983#fibo1EXIT >#50#return; 6647#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6915#fibo2FINAL assume true; 6841#fibo2EXIT >#52#return; 6695#L15-1 [2023-11-19 08:06:44,761 INFO L750 eck$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 08:06:44,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2023-11-19 08:06:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:44,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205697183] [2023-11-19 08:06:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:44,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 08:06:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,932 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 08:06:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205697183] [2023-11-19 08:06:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205697183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760853352] [2023-11-19 08:06:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:44,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:44,945 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:44,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-19 08:06:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:06:45,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:45,072 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 08:06:45,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:45,281 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 08:06:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760853352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:45,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:45,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-19 08:06:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068147043] [2023-11-19 08:06:45,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:45,283 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:45,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1404661389, now seen corresponding path program 1 times [2023-11-19 08:06:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:45,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337786916] [2023-11-19 08:06:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:45,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:45,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:45,569 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:45,569 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:45,569 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:45,570 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:45,570 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:45,570 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,570 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:45,570 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:45,570 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration6_Loop [2023-11-19 08:06:45,570 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:45,570 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:45,571 INFO 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 08:06:45,574 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 08:06:45,577 INFO 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 08:06:45,579 INFO 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 08:06:45,582 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:45,587 INFO 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 08:06:45,589 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:45,591 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:45,594 INFO 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 08:06:45,639 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:45,639 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:45,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,641 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,648 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:45,648 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2023-11-19 08:06:45,670 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:45,670 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 08:06:45,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,689 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:45,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2023-11-19 08:06:45,714 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:45,714 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 08:06:45,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,734 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:45,737 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2023-11-19 08:06:45,759 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:45,760 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 08:06:45,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,779 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:45,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-19 08:06:45,807 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 08:06:45,808 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 08:06:45,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,829 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,832 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:45,832 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-19 08:06:45,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:45,873 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:45,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:45,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:45,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-19 08:06:45,919 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:45,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:45,938 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:45,938 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:45,938 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:45,938 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:45,938 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:45,938 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:45,938 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:45,938 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:45,938 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration6_Loop [2023-11-19 08:06:45,938 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:45,939 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:45,939 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 08:06:45,942 INFO 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 08:06:45,945 INFO 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 08:06:45,950 INFO 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 08:06:45,953 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:45,958 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 08:06:45,962 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 08:06:45,965 INFO 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 08:06:45,967 INFO 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 08:06:46,026 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:46,026 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:46,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:46,028 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:46,032 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 08:06:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-19 08:06:46,046 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:46,046 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:46,046 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:46,046 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:46,046 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:46,047 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:46,047 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:46,063 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:46,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:46,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:46,084 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:46,086 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 08:06:46,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-19 08:06:46,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:46,099 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:46,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:46,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:46,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:46,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:46,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:46,114 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 08:06:46,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:46,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:46,134 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:46,137 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 08:06:46,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-19 08:06:46,148 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:46,148 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:46,148 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:46,148 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:46,148 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:46,149 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:46,149 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:46,159 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:46,163 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 08:06:46,163 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 08:06:46,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:46,169 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:46,170 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:46,170 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:46,170 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:46,170 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 08:06:46,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2023-11-19 08:06:46,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2023-11-19 08:06:46,183 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:46,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:46,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:46,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:46,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:06:46,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:46,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:46,694 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 08:06:46,695 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 08:06:46,695 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 08:06:47,180 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 08:06:47,181 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 08:06:47,182 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 08:06:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 68 transitions. [2023-11-19 08:06:47,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 26 letters. [2023-11-19 08:06:47,183 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:47,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 58 letters. Loop has 26 letters. [2023-11-19 08:06:47,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:47,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 52 letters. [2023-11-19 08:06:47,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:47,185 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1744 states and 2390 transitions. [2023-11-19 08:06:47,212 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 143 [2023-11-19 08:06:47,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1744 states to 1582 states and 2212 transitions. [2023-11-19 08:06:47,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 538 [2023-11-19 08:06:47,241 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 572 [2023-11-19 08:06:47,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1582 states and 2212 transitions. [2023-11-19 08:06:47,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:47,241 INFO L218 hiAutomatonCegarLoop]: Abstraction has 1582 states and 2212 transitions. [2023-11-19 08:06:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states and 2212 transitions. [2023-11-19 08:06:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1505. [2023-11-19 08:06:47,291 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 08:06:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2106 transitions. [2023-11-19 08:06:47,304 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1505 states and 2106 transitions. [2023-11-19 08:06:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:06:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:06:47,306 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 08:06:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:47,565 INFO L93 Difference]: Finished difference Result 1604 states and 1988 transitions. [2023-11-19 08:06:47,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1604 states and 1988 transitions. [2023-11-19 08:06:47,594 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 147 [2023-11-19 08:06:47,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1604 states to 594 states and 683 transitions. [2023-11-19 08:06:47,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2023-11-19 08:06:47,603 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 289 [2023-11-19 08:06:47,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 594 states and 683 transitions. [2023-11-19 08:06:47,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:47,607 INFO L218 hiAutomatonCegarLoop]: Abstraction has 594 states and 683 transitions. [2023-11-19 08:06:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states and 683 transitions. [2023-11-19 08:06:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 482. [2023-11-19 08:06:47,621 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 08:06:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 549 transitions. [2023-11-19 08:06:47,624 INFO L240 hiAutomatonCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-19 08:06:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:06:47,625 INFO L428 stractBuchiCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-19 08:06:47,625 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-19 08:06:47,625 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 482 states and 549 transitions. [2023-11-19 08:06:47,629 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 102 [2023-11-19 08:06:47,629 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:47,629 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:47,630 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 08:06:47,630 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 08:06:47,631 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 08:06:47,631 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 08:06:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 1 times [2023-11-19 08:06:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470331196] [2023-11-19 08:06:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:47,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:47,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:47,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash -303531802, now seen corresponding path program 1 times [2023-11-19 08:06:47,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:47,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108669155] [2023-11-19 08:06:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 08:06:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 08:06:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:47,694 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 08:06:47,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108669155] [2023-11-19 08:06:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108669155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321081760] [2023-11-19 08:06:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:47,696 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-19 08:06:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:47,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:47,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:47,763 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 08:06:47,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:47,831 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 08:06:47,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321081760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:47,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:47,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-19 08:06:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811277679] [2023-11-19 08:06:47,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:47,833 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 08:06:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:06:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:47,834 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 08:06:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:47,899 INFO L93 Difference]: Finished difference Result 326 states and 353 transitions. [2023-11-19 08:06:47,900 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 326 states and 353 transitions. [2023-11-19 08:06:47,904 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-19 08:06:47,907 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 326 states to 271 states and 298 transitions. [2023-11-19 08:06:47,907 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147 [2023-11-19 08:06:47,907 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2023-11-19 08:06:47,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 298 transitions. [2023-11-19 08:06:47,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:47,908 INFO L218 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 08:06:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 298 transitions. [2023-11-19 08:06:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2023-11-19 08:06:47,914 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 08:06:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 298 transitions. [2023-11-19 08:06:47,916 INFO L240 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 08:06:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:06:47,917 INFO L428 stractBuchiCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-19 08:06:47,917 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-19 08:06:47,917 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 271 states and 298 transitions. [2023-11-19 08:06:47,919 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-19 08:06:47,919 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:47,919 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:47,920 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 08:06:47,920 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:47,921 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#$Ultimate##0 ~n := #in~n; 13444#L20 assume !(~n < 1); 13442#L22 assume 1 == ~n;#res := 1; 13443#fibo2FINAL assume true; 13430#fibo2EXIT >#52#return; 13404#L15-1 [2023-11-19 08:06:47,921 INFO L750 eck$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 08:06:47,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 794867286, now seen corresponding path program 1 times [2023-11-19 08:06:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:47,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719075143] [2023-11-19 08:06:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 08:06:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 08:06:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,063 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 08:06:48,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:48,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719075143] [2023-11-19 08:06:48,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719075143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:48,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097733674] [2023-11-19 08:06:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:48,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,065 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-19 08:06:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:48,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:48,178 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 08:06:48,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:48,292 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 08:06:48,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097733674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:48,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:48,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2023-11-19 08:06:48,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932963926] [2023-11-19 08:06:48,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:48,293 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 08:06:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2023-11-19 08:06:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821219741] [2023-11-19 08:06:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:48,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:48,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:48,500 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:48,500 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:48,500 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:48,500 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:48,500 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:48,500 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,500 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:48,500 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:48,500 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration8_Loop [2023-11-19 08:06:48,501 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:48,501 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:48,501 INFO 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 08:06:48,507 INFO 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 08:06:48,509 INFO 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 08:06:48,512 INFO 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 08:06:48,515 INFO 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 08:06:48,518 INFO 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 08:06:48,521 INFO 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 08:06:48,524 INFO 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 08:06:48,527 INFO 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 08:06:48,592 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:48,593 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:48,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,595 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:48,596 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:48,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-19 08:06:48,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:48,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,650 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:48,652 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:48,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-19 08:06:48,679 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:48,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:48,697 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:48,697 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:48,697 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:48,697 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:48,697 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:48,697 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,697 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:48,697 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:48,697 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration8_Loop [2023-11-19 08:06:48,697 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:48,697 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:48,698 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 08:06:48,703 INFO 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 08:06:48,705 INFO 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 08:06:48,707 INFO 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 08:06:48,709 INFO 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 08:06:48,711 INFO 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 08:06:48,713 INFO 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 08:06:48,715 INFO 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 08:06:48,718 INFO 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 08:06:48,767 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:48,768 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,769 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,773 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 08:06:48,785 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:48,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:48,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:48,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:48,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:48,787 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:48,787 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:48,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-19 08:06:48,803 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:48,806 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 08:06:48,806 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 08:06:48,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,808 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,809 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:48,810 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:48,810 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:48,810 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 08:06:48,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2023-11-19 08:06:48,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:48,829 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:48,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:48,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:49,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:06:49,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:49,223 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 08:06:49,224 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 08:06:49,224 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 08:06:49,544 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 08:06:49,544 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 08:06:49,545 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 08:06:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 50 transitions. [2023-11-19 08:06:49,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 50 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 08:06:49,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:49,546 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:49,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:49,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:49,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:49,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:49,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:06:49,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:49,988 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 08:06:49,988 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 08:06:49,989 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 08:06:50,229 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 08:06:50,234 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 08:06:50,234 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 08:06:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2023-11-19 08:06:50,235 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 08:06:50,235 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:50,235 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:50,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:50,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:50,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:50,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:06:50,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:50,671 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 08:06:50,672 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 08:06:50,672 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 08:06:51,044 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 08:06:51,045 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 08:06:51,045 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 08:06:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 61 transitions. [2023-11-19 08:06:51,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-19 08:06:51,050 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:51,050 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 52 letters. Loop has 14 letters. [2023-11-19 08:06:51,050 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:51,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 28 letters. [2023-11-19 08:06:51,053 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:51,053 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1102 states and 1208 transitions. [2023-11-19 08:06:51,067 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 162 [2023-11-19 08:06:51,110 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1102 states to 538 states and 595 transitions. [2023-11-19 08:06:51,110 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 252 [2023-11-19 08:06:51,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2023-11-19 08:06:51,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 595 transitions. [2023-11-19 08:06:51,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:51,111 INFO L218 hiAutomatonCegarLoop]: Abstraction has 538 states and 595 transitions. [2023-11-19 08:06:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 595 transitions. [2023-11-19 08:06:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 419. [2023-11-19 08:06:51,125 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 08:06:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 456 transitions. [2023-11-19 08:06:51,127 INFO L240 hiAutomatonCegarLoop]: Abstraction has 419 states and 456 transitions. [2023-11-19 08:06:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:06:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:06:51,128 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 08:06:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:51,249 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2023-11-19 08:06:51,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 241 transitions. [2023-11-19 08:06:51,252 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-19 08:06:51,253 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 83 states and 86 transitions. [2023-11-19 08:06:51,253 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2023-11-19 08:06:51,253 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2023-11-19 08:06:51,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 86 transitions. [2023-11-19 08:06:51,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 08:06:51,254 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 86 transitions. [2023-11-19 08:06:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 86 transitions. [2023-11-19 08:06:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2023-11-19 08:06:51,255 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 08:06:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-19 08:06:51,256 INFO L240 hiAutomatonCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-19 08:06:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:06:51,258 INFO L428 stractBuchiCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-19 08:06:51,258 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-19 08:06:51,258 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 66 states and 68 transitions. [2023-11-19 08:06:51,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-19 08:06:51,259 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:06:51,259 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:06:51,260 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 08:06:51,260 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 08:06:51,261 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 08:06:51,261 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 08:06:51,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 2 times [2023-11-19 08:06:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813880641] [2023-11-19 08:06:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:51,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 878078665, now seen corresponding path program 2 times [2023-11-19 08:06:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:51,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919645447] [2023-11-19 08:06:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,293 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:51,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1575530616, now seen corresponding path program 3 times [2023-11-19 08:06:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66335287] [2023-11-19 08:06:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 08:06:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 08:06:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 08:06:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 08:06:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-19 08:06:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,448 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 08:06:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66335287] [2023-11-19 08:06:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66335287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096838575] [2023-11-19 08:06:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:06:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:51,451 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:51,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-19 08:06:51,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:06:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:51,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:51,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:51,625 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 08:06:51,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:51,864 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 08:06:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096838575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:51,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:51,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 24 [2023-11-19 08:06:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940908441] [2023-11-19 08:06:51,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:52,263 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:52,263 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:52,263 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:52,263 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:52,263 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 08:06:52,263 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,263 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:52,264 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:52,264 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration9_Loop [2023-11-19 08:06:52,264 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:52,264 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:52,265 INFO 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 08:06:52,271 INFO 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 08:06:52,274 INFO 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 08:06:52,277 INFO 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 08:06:52,280 INFO 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 08:06:52,283 INFO 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 08:06:52,288 INFO 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 08:06:52,291 INFO 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 08:06:52,294 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 08:06:52,367 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:52,368 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 08:06:52,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:52,371 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:52,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2023-11-19 08:06:52,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 08:06:52,382 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:52,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2023-11-19 08:06:52,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:52,413 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:52,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2023-11-19 08:06:52,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 08:06:52,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 08:06:52,432 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 08:06:52,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2023-11-19 08:06:52,445 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 08:06:52,445 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 08:06:52,445 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 08:06:52,445 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 08:06:52,445 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 08:06:52,445 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,445 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 08:06:52,445 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 08:06:52,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration9_Loop [2023-11-19 08:06:52,446 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 08:06:52,446 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 08:06:52,446 INFO 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 08:06:52,455 INFO 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 08:06:52,458 INFO 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 08:06:52,460 INFO 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 08:06:52,463 INFO 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 08:06:52,465 INFO 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 08:06:52,467 INFO 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 08:06:52,476 INFO 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 08:06:52,478 INFO 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 08:06:52,549 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 08:06:52,549 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 08:06:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:52,550 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:52,553 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 08:06:52,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2023-11-19 08:06:52,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 08:06:52,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 08:06:52,566 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 08:06:52,566 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 08:06:52,566 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 08:06:52,568 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 08:06:52,568 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 08:06:52,578 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 08:06:52,580 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 08:06:52,580 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 08:06:52,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:06:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:52,584 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:52,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2023-11-19 08:06:52,585 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 08:06:52,586 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 08:06:52,586 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 08:06:52,586 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-19 08:06:52,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:52,608 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 08:06:52,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:52,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:52,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:52,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:53,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:06:53,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:53,242 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 08:06:53,243 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 08:06:53,243 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 08:06:53,398 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 08:06:53,399 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 08:06:53,399 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 08:06:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-19 08:06:53,400 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 08:06:53,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:53,400 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:53,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:53,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:53,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:53,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:06:53,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:54,045 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 08:06:54,046 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 08:06:54,046 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 08:06:54,167 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 08:06:54,171 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 08:06:54,172 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 08:06:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-19 08:06:54,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 08:06:54,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:54,173 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:54,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:54,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:54,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:54,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:06:54,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:54,820 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 08:06:54,820 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 08:06:54,821 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 08:06:55,214 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 08:06:55,219 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 08:06:55,220 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 08:06:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 53 transitions. [2023-11-19 08:06:55,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 08:06:55,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:55,228 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 08:06:55,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:55,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:55,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:55,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:06:55,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:55,835 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 08:06:55,835 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 08:06:55,836 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 08:06:56,372 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 107 states and 112 transitions. Complement of second has 35 states. [2023-11-19 08:06:56,372 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 08:06:56,373 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 08:06:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 51 transitions. [2023-11-19 08:06:56,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-19 08:06:56,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:56,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 59 letters. Loop has 22 letters. [2023-11-19 08:06:56,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:56,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 44 letters. [2023-11-19 08:06:56,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 08:06:56,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 107 states and 112 transitions. [2023-11-19 08:06:56,376 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 08:06:56,376 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 107 states to 0 states and 0 transitions. [2023-11-19 08:06:56,376 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 08:06:56,377 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 08:06:56,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 08:06:56,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,377 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:06:56,377 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:06:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:06:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:06:56,378 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 08:06:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:56,378 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-11-19 08:06:56,379 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-11-19 08:06:56,379 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 08:06:56,379 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 08:06:56,379 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 08:06:56,379 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 08:06:56,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 08:06:56,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,379 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:06:56,379 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:06:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:06:56,380 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:06:56,380 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-11-19 08:06:56,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-19 08:06:56,380 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 08:06:56,380 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-19 08:06:56,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 08:06:56 BoogieIcfgContainer [2023-11-19 08:06:56,389 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 08:06:56,390 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 08:06:56,390 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 08:06:56,390 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 08:06:56,391 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:31" (3/4) ... [2023-11-19 08:06:56,393 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 08:06:56,394 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 08:06:56,395 INFO L158 Benchmark]: Toolchain (without parser) took 25974.32ms. Allocated memory was 188.7MB in the beginning and 272.6MB in the end (delta: 83.9MB). Free memory was 155.3MB in the beginning and 97.9MB in the end (delta: 57.4MB). Peak memory consumption was 142.5MB. Max. memory is 16.1GB. [2023-11-19 08:06:56,396 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 119.5MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:06:56,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 188.7MB. Free memory was 154.7MB in the beginning and 144.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 08:06:56,396 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.76ms. Allocated memory is still 188.7MB. Free memory was 144.7MB in the beginning and 143.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 08:06:56,397 INFO L158 Benchmark]: Boogie Preprocessor took 26.92ms. Allocated memory is still 188.7MB. Free memory was 143.3MB in the beginning and 142.6MB in the end (delta: 669.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:06:56,397 INFO L158 Benchmark]: RCFGBuilder took 396.44ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 132.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 08:06:56,398 INFO L158 Benchmark]: BuchiAutomizer took 25182.72ms. Allocated memory was 188.7MB in the beginning and 272.6MB in the end (delta: 83.9MB). Free memory was 132.2MB in the beginning and 97.9MB in the end (delta: 34.4MB). Peak memory consumption was 119.4MB. Max. memory is 16.1GB. [2023-11-19 08:06:56,398 INFO L158 Benchmark]: Witness Printer took 4.78ms. Allocated memory is still 272.6MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:06:56,400 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73ms. Allocated memory is still 119.5MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 188.7MB. Free memory was 154.7MB in the beginning and 144.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.76ms. Allocated memory is still 188.7MB. Free memory was 144.7MB in the beginning and 143.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.92ms. Allocated memory is still 188.7MB. Free memory was 143.3MB in the beginning and 142.6MB in the end (delta: 669.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 396.44ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 132.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 25182.72ms. Allocated memory was 188.7MB in the beginning and 272.6MB in the end (delta: 83.9MB). Free memory was 132.2MB in the beginning and 97.9MB in the end (delta: 34.4MB). Peak memory consumption was 119.4MB. Max. memory is 16.1GB. * Witness Printer took 4.78ms. Allocated memory is still 272.6MB. Free memory is still 97.9MB. 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 25.1s and 10 iterations. TraceHistogramMax:8. Analysis of lassos took 11.9s. Construction of modules took 2.2s. Büchi inclusion checks took 10.3s. 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, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 928 mSDsluCounter, 1503 SdHoareTripleChecker+Invalid, 2.2s 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: 57ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 22 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-19 08:06:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:56,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-19 08:06:56,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-19 08:06:57,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-19 08:06:57,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:57,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-19 08:06:57,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-19 08:06:57,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-19 08:06:58,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17637de4-60f4-4b99-98f7-d2f38f797ef5/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