./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/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_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/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 64bit --witnessprinter.graph.data.programhash 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:55,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:55,824 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-19 07:37:55,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:55,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:55,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:55,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:55,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:55,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:55,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:55,869 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:55,870 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:37:55,870 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:37:55,871 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:37:55,872 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:37:55,873 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:37:55,874 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:37:55,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:55,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:37:55,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:55,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:55,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:37:55,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:37:55,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:37:55,881 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:55,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:55,883 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:37:55,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:55,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:55,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:55,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:55,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:55,888 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:37:55,888 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_26b889f5-60c5-49cb-9d27-fe16feb6352d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2023-11-19 07:37:56,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:56,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:56,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:56,304 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:56,305 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:56,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-11-19 07:37:59,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:59,728 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:59,729 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-11-19 07:37:59,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/data/70e6da3d7/42e24a8cffc64753911ff18137a76123/FLAG8182c9fd5 [2023-11-19 07:37:59,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/data/70e6da3d7/42e24a8cffc64753911ff18137a76123 [2023-11-19 07:37:59,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:59,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:59,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:59,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:59,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:59,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:37:59,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61162323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59, skipping insertion in model container [2023-11-19 07:37:59,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:37:59,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:59,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:59,953 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:59,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:59,981 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:59,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59 WrapperNode [2023-11-19 07:37:59,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:59,984 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:59,984 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:59,984 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:59,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:37:59,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,017 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 10 [2023-11-19 07:38:00,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:00,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:00,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:00,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:00,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:00,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:00,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:00,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:00,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (1/1) ... [2023-11-19 07:38:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:00,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:00,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-11-19 07:38:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-11-19 07:38:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:00,171 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:00,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:00,265 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:00,273 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:00,274 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:38:00,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:00 BoogieIcfgContainer [2023-11-19 07:38:00,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:00,279 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:38:00,279 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:38:00,283 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:38:00,284 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:38:00,284 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:37:59" (1/3) ... [2023-11-19 07:38:00,286 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b4041fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:38:00, skipping insertion in model container [2023-11-19 07:38:00,286 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:38:00,286 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:59" (2/3) ... [2023-11-19 07:38:00,286 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b4041fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:38:00, skipping insertion in model container [2023-11-19 07:38:00,287 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:38:00,287 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:00" (3/3) ... [2023-11-19 07:38:00,288 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2023-11-19 07:38:00,344 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:38:00,344 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:38:00,344 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:38:00,344 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:38:00,344 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:38:00,345 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:38:00,345 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:38:00,345 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:38:00,350 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:38:00,372 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-11-19 07:38:00,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:38:00,373 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:38:00,380 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-11-19 07:38:00,380 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-19 07:38:00,380 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:38:00,381 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:38:00,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-11-19 07:38:00,383 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:38:00,383 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:38:00,384 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-11-19 07:38:00,384 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-19 07:38:00,393 INFO L748 eck$LassoCheckResult]: Stem: 10#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;havoc main_#t~nondet2#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 11#L20true assume !(main_~x~0#1 < 0); 9#L21true call main_#t~ret3#1 := g(main_~x~0#1);< 12#$Ultimate##0true [2023-11-19 07:38:00,393 INFO L750 eck$LassoCheckResult]: Loop: 12#$Ultimate##0true ~x := #in~x; 6#L12true assume !(0 == ~x); 4#L15true call #t~ret0 := g(~x - 1);< 12#$Ultimate##0true [2023-11-19 07:38:00,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2023-11-19 07:38:00,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:00,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678104490] [2023-11-19 07:38:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:00,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2023-11-19 07:38:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:00,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957785808] [2023-11-19 07:38:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:00,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2023-11-19 07:38:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:00,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389531651] [2023-11-19 07:38:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,584 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:00,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:00,720 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:00,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:00,721 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:00,722 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:00,722 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:38:00,722 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:00,722 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:00,723 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:00,723 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2023-11-19 07:38:00,723 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:00,723 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:00,748 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:00,762 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:00,766 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:00,770 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:00,774 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:00,859 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:00,859 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:38:00,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:00,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:00,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:00,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:38:00,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:00,870 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:00,896 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:00,896 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:00,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:00,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:00,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:00,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:38:00,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:00,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:00,935 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:00,935 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:00,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:00,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:00,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:00,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:38:00,979 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:00,979 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:00,993 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:00,994 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-11-19 07:38:01,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:38:01,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,030 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,030 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:38:01,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,066 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:38:01,118 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:38:01,158 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,159 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8} Honda state: {g_#in~x=-8} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [6, 1, 13] Nus: [0, 1] [2023-11-19 07:38:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,204 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:01,205 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:01,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:01,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:01,205 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:38:01,206 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,206 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:01,206 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:01,206 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2023-11-19 07:38:01,206 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:01,207 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:01,209 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,212 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,215 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,219 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,222 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,225 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,235 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,238 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,241 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,313 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:01,316 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:38:01,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:38:01,365 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,365 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2023-11-19 07:38:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:38:01,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:38:01,467 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,467 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,492 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,492 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:38:01,534 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,585 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,585 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,623 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-19 07:38:01,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:01,648 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:01,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,684 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:01,684 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:38:01,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:38:01,746 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:01,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:38:01,824 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:38:01,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,832 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:01,832 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:01,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:01,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:01,832 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:38:01,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,833 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:01,833 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:01,833 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2023-11-19 07:38:01,833 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:01,833 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:01,835 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,839 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,843 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,847 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,850 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,854 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,857 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,861 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,871 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:01,937 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:01,943 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:38:01,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:01,946 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:01,954 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:38:01,969 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:01,970 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:01,970 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:01,970 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:01,971 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:01,973 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:01,974 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:01,997 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,029 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:38:02,044 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,044 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,044 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,044 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,045 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,046 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,056 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 07:38:02,091 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,105 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,105 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,105 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,105 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,105 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,108 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,108 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,119 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,151 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-19 07:38:02,163 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,163 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,164 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,164 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,164 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,167 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,167 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,184 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,210 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,217 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 07:38:02,231 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,231 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,231 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,231 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,231 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,233 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,233 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,242 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,270 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,283 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,283 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,284 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,284 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,284 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,285 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,285 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 07:38:02,294 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,321 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,335 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:38:02,349 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,349 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:02,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:02,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,350 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:02,350 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:02,372 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:02,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,401 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:02,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 07:38:02,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:02,415 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:02,415 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:38:02,415 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:02,444 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:38:02,444 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:38:02,492 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:38:02,519 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2023-11-19 07:38:02,519 INFO L444 ModelExtractionUtils]: 2 out of 11 variables were initially zero. Simplification set additionally 6 variables to zero. [2023-11-19 07:38:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,558 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,563 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:38:02,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 07:38:02,598 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-11-19 07:38:02,599 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:38:02,599 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2023-11-19 07:38:02,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,631 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-11-19 07:38:02,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:38:02,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:38:02,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:02,841 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-19 07:38:02,843 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:03,034 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 36 states and 43 transitions. Complement of second has 13 states. [2023-11-19 07:38:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:38:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2023-11-19 07:38:03,045 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2023-11-19 07:38:03,046 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:03,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2023-11-19 07:38:03,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:03,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2023-11-19 07:38:03,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:03,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2023-11-19 07:38:03,053 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-11-19 07:38:03,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2023-11-19 07:38:03,061 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2023-11-19 07:38:03,062 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2023-11-19 07:38:03,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2023-11-19 07:38:03,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:38:03,065 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:38:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2023-11-19 07:38:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-11-19 07:38:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:38:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-19 07:38:03,098 INFO L240 hiAutomatonCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-19 07:38:03,098 INFO L428 stractBuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-19 07:38:03,099 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:38:03,099 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2023-11-19 07:38:03,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-11-19 07:38:03,100 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:38:03,100 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:38:03,102 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,102 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,102 INFO L748 eck$LassoCheckResult]: Stem: 127#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 128#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;havoc main_#t~nondet2#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 129#L20 assume !(main_~x~0#1 < 0); 124#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 126#$Ultimate##0 ~x := #in~x; 130#L12 assume !(0 == ~x); 119#L15 call #t~ret0 := g(~x - 1);< 125#$Ultimate##0 ~x := #in~x; 131#L12 assume 0 == ~x;#res := 1; 118#gFINAL assume true; 120#gEXIT >#23#return; 122#L15-1 [2023-11-19 07:38:03,102 INFO L750 eck$LassoCheckResult]: Loop: 122#L15-1 call #t~ret1 := g(1 + #t~ret0);< 123#$Ultimate##0 ~x := #in~x; 134#L12 assume !(0 == ~x); 121#L15 call #t~ret0 := g(~x - 1);< 123#$Ultimate##0 ~x := #in~x; 134#L12 assume 0 == ~x;#res := 1; 133#gFINAL assume true; 135#gEXIT >#23#return; 122#L15-1 [2023-11-19 07:38:03,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2023-11-19 07:38:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21923322] [2023-11-19 07:38:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:03,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:03,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:03,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2023-11-19 07:38:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718559431] [2023-11-19 07:38:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:03,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:03,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:03,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2023-11-19 07:38:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941903100] [2023-11-19 07:38:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:38:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:38:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:03,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:03,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941903100] [2023-11-19 07:38:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941903100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236802104] [2023-11-19 07:38:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:03,379 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:03,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 07:38:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:38:03,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:03,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:03,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236802104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:03,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:03,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-11-19 07:38:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102304548] [2023-11-19 07:38:03,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,738 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:03,739 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:03,739 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:03,739 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:03,739 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:38:03,739 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:03,739 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:03,739 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:03,740 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2023-11-19 07:38:03,740 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:03,740 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:03,741 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:03,745 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:03,747 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:03,751 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:03,756 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 07:38:03,798 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:03,799 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:38:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:03,800 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:03,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 07:38:03,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:03,829 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:03,852 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:03,852 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=1} Honda state: {g_#in~x=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:03,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:03,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:03,877 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:03,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:03,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:03,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:38:03,912 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:03,912 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:03,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:03,938 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:03,942 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:03,942 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:03,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:38:03,977 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:03,977 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=1} Honda state: {g_~x=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:04,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,002 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:04,009 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:04,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:38:04,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,054 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,057 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:38:04,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:04,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:38:04,088 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:38:04,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,108 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:04,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:04,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:04,109 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:04,109 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:38:04,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:04,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:04,109 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2023-11-19 07:38:04,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:04,109 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:04,110 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 07:38:04,114 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:04,122 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:04,125 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 07:38:04,130 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:04,175 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:04,177 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:38:04,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,179 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,186 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:04,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:04,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:04,199 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:04,199 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:04,199 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:04,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:04,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:04,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 07:38:04,212 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:04,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,237 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:04,251 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:04,252 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:04,252 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:04,252 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:04,252 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:04,253 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:04,253 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:04,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-19 07:38:04,262 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:04,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,287 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,290 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 07:38:04,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-19 07:38:04,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:04,304 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:04,304 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:04,304 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:04,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:04,305 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:04,305 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:04,324 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:38:04,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,349 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,351 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:38:04,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:38:04,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:38:04,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:38:04,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:38:04,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:38:04,365 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:38:04,365 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:38:04,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-19 07:38:04,380 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:38:04,393 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:38:04,394 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:38:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,396 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,397 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:38:04,397 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:38:04,397 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:38:04,398 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2023-11-19 07:38:04,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-19 07:38:04,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,417 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:38:04,422 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:04,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:38:04,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:38:04,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:04,700 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-19 07:38:04,700 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:38:05,041 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 83 states and 121 transitions. Complement of second has 31 states. [2023-11-19 07:38:05,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-19 07:38:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:38:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2023-11-19 07:38:05,046 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-19 07:38:05,046 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:05,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2023-11-19 07:38:05,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:05,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2023-11-19 07:38:05,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:38:05,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2023-11-19 07:38:05,059 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-11-19 07:38:05,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2023-11-19 07:38:05,065 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2023-11-19 07:38:05,065 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-19 07:38:05,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2023-11-19 07:38:05,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:38:05,066 INFO L218 hiAutomatonCegarLoop]: Abstraction has 59 states and 82 transitions. [2023-11-19 07:38:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2023-11-19 07:38:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-11-19 07:38:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2023-11-19 07:38:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2023-11-19 07:38:05,078 INFO L240 hiAutomatonCegarLoop]: Abstraction has 53 states and 72 transitions. [2023-11-19 07:38:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:38:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:38:05,082 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:38:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:05,180 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-19 07:38:05,180 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2023-11-19 07:38:05,182 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-11-19 07:38:05,183 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2023-11-19 07:38:05,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2023-11-19 07:38:05,184 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2023-11-19 07:38:05,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2023-11-19 07:38:05,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:38:05,184 INFO L218 hiAutomatonCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-19 07:38:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2023-11-19 07:38:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-19 07:38:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:38:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-19 07:38:05,190 INFO L240 hiAutomatonCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-19 07:38:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:38:05,193 INFO L428 stractBuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-19 07:38:05,193 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:38:05,193 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2023-11-19 07:38:05,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-11-19 07:38:05,198 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:38:05,198 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:38:05,200 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:05,200 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-19 07:38:05,201 INFO L748 eck$LassoCheckResult]: Stem: 578#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 579#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;havoc main_#t~nondet2#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 580#L20 assume !(main_~x~0#1 < 0); 572#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 577#$Ultimate##0 ~x := #in~x; 583#L12 assume !(0 == ~x); 566#L15 call #t~ret0 := g(~x - 1);< 571#$Ultimate##0 ~x := #in~x; 584#L12 assume 0 == ~x;#res := 1; 565#gFINAL assume true; 567#gEXIT >#23#return; 569#L15-1 call #t~ret1 := g(1 + #t~ret0);< 581#$Ultimate##0 ~x := #in~x; 582#L12 assume !(0 == ~x); 568#L15 call #t~ret0 := g(~x - 1);< 570#$Ultimate##0 ~x := #in~x; 585#L12 assume !(0 == ~x); 574#L15 [2023-11-19 07:38:05,201 INFO L750 eck$LassoCheckResult]: Loop: 574#L15 call #t~ret0 := g(~x - 1);< 588#$Ultimate##0 ~x := #in~x; 586#L12 assume !(0 == ~x); 574#L15 [2023-11-19 07:38:05,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2023-11-19 07:38:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944320011] [2023-11-19 07:38:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:05,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:05,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:05,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2023-11-19 07:38:05,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:05,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587691752] [2023-11-19 07:38:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:05,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:05,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:05,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2023-11-19 07:38:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295861360] [2023-11-19 07:38:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:38:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:38:05,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295861360] [2023-11-19 07:38:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295861360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844984634] [2023-11-19 07:38:05,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:38:05,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,549 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-19 07:38:05,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 07:38:05,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:05,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:38:05,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:38:05,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:38:05,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844984634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:05,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:05,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-11-19 07:38:05,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873210300] [2023-11-19 07:38:05,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:05,717 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:38:05,717 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:38:05,717 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:38:05,717 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:38:05,717 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:38:05,717 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:05,718 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:38:05,718 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:38:05,718 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2023-11-19 07:38:05,718 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:38:05,718 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:38:05,719 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:05,722 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:05,724 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:05,732 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:38:05,785 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:38:05,785 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:38:05,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:05,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,786 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-19 07:38:05,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:05,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:05,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:05,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:05,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:05,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,839 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,842 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:05,842 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:05,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-19 07:38:05,872 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:05,873 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:05,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,897 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,900 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:05,900 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:05,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-19 07:38:05,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:05,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:05,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,959 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,965 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:38:05,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:05,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-19 07:38:06,153 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:06,153 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-3, g_~x=-3} Honda state: {g_#in~x=-3, g_~x=-3} Generalized eigenvectors: [{g_#in~x=-3, g_~x=0}, {g_#in~x=3, g_~x=0}, {g_#in~x=-1, g_~x=-1}] Lambdas: [1, 0, 1] Nus: [1, 0] [2023-11-19 07:38:06,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:38:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:06,171 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-19 07:38:06,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:38:06,175 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:38:06,187 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:38:06,187 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:38:06,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:06,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:38:06,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:38:06,203 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:38:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:06,338 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-19 07:38:06,339 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2023-11-19 07:38:06,340 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-11-19 07:38:06,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2023-11-19 07:38:06,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2023-11-19 07:38:06,341 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2023-11-19 07:38:06,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2023-11-19 07:38:06,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:38:06,341 INFO L218 hiAutomatonCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-19 07:38:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2023-11-19 07:38:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-11-19 07:38:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:38:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-11-19 07:38:06,345 INFO L240 hiAutomatonCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-11-19 07:38:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:38:06,346 INFO L428 stractBuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-11-19 07:38:06,346 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:38:06,346 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2023-11-19 07:38:06,347 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-11-19 07:38:06,347 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:38:06,347 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:38:06,348 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,348 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:38:06,348 INFO L748 eck$LassoCheckResult]: Stem: 775#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 776#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;havoc main_#t~nondet2#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 777#L20 assume !(main_~x~0#1 < 0); 771#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 774#$Ultimate##0 ~x := #in~x; 779#L12 assume !(0 == ~x); 770#L15 call #t~ret0 := g(~x - 1);< 772#$Ultimate##0 ~x := #in~x; 780#L12 assume 0 == ~x;#res := 1; 784#gFINAL assume true; 773#gEXIT >#23#return; 768#L15-1 [2023-11-19 07:38:06,349 INFO L750 eck$LassoCheckResult]: Loop: 768#L15-1 call #t~ret1 := g(1 + #t~ret0);< 782#$Ultimate##0 ~x := #in~x; 781#L12 assume !(0 == ~x); 767#L15 call #t~ret0 := g(~x - 1);< 769#$Ultimate##0 ~x := #in~x; 778#L12 assume !(0 == ~x); 765#L15 call #t~ret0 := g(~x - 1);< 783#$Ultimate##0 ~x := #in~x; 785#L12 assume 0 == ~x;#res := 1; 764#gFINAL assume true; 766#gEXIT >#23#return; 768#L15-1 [2023-11-19 07:38:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2023-11-19 07:38:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812810446] [2023-11-19 07:38:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,355 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:06,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2023-11-19 07:38:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159899789] [2023-11-19 07:38:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:06,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2023-11-19 07:38:06,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501649319] [2023-11-19 07:38:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,381 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:06,774 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:06,781 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:06,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:38:06 BoogieIcfgContainer [2023-11-19 07:38:06,783 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 07:38:06,783 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:38:06,784 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:38:06,784 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:38:06,784 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:00" (3/4) ... [2023-11-19 07:38:06,786 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-11-19 07:38:06,788 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:06,824 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:38:06,824 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:38:06,825 INFO L158 Benchmark]: Toolchain (without parser) took 7061.85ms. Allocated memory was 123.7MB in the beginning and 172.0MB in the end (delta: 48.2MB). Free memory was 77.0MB in the beginning and 60.2MB in the end (delta: 16.8MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,825 INFO L158 Benchmark]: CDTParser took 0.62ms. Allocated memory is still 123.7MB. Free memory is still 96.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:38:06,826 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.12ms. Allocated memory is still 123.7MB. Free memory was 76.6MB in the beginning and 67.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.57ms. Allocated memory is still 123.7MB. Free memory was 67.7MB in the beginning and 66.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,826 INFO L158 Benchmark]: Boogie Preprocessor took 18.37ms. Allocated memory is still 123.7MB. Free memory was 66.1MB in the beginning and 65.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:38:06,827 INFO L158 Benchmark]: RCFGBuilder took 239.99ms. Allocated memory is still 123.7MB. Free memory was 65.0MB in the beginning and 56.8MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,827 INFO L158 Benchmark]: BuchiAutomizer took 6504.21ms. Allocated memory was 123.7MB in the beginning and 172.0MB in the end (delta: 48.2MB). Free memory was 56.5MB in the beginning and 62.3MB in the end (delta: -5.8MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,828 INFO L158 Benchmark]: Witness Printer took 40.64ms. Allocated memory is still 172.0MB. Free memory was 62.3MB in the beginning and 60.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:38:06,830 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62ms. Allocated memory is still 123.7MB. Free memory is still 96.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.12ms. Allocated memory is still 123.7MB. Free memory was 76.6MB in the beginning and 67.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.57ms. Allocated memory is still 123.7MB. Free memory was 67.7MB in the beginning and 66.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.37ms. Allocated memory is still 123.7MB. Free memory was 66.1MB in the beginning and 65.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 239.99ms. Allocated memory is still 123.7MB. Free memory was 65.0MB in the beginning and 56.8MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 6504.21ms. Allocated memory was 123.7MB in the beginning and 172.0MB in the end (delta: 48.2MB). Free memory was 56.5MB in the beginning and 62.3MB in the end (delta: -5.8MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. * Witness Printer took 40.64ms. Allocated memory is still 172.0MB. Free memory was 62.3MB in the beginning and 60.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function null and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 11 locations. The remainder module has 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.4s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 4.9s. Construction of modules took 0.2s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 226 IncrementalHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 50 mSDtfsCounter, 226 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp85 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq190 hnf92 smp100 dnf133 smp100 tf106 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 204ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 15 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 15]: Nontermination argument in form of an infinite program execution. [2023-11-19 07:38:06,840 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:06,843 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated Nontermination argument in form of an infinite program execution. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) VAL [x=1] [L21] CALL g(x) VAL [\old(x)=1] [L12] COND FALSE !(x == 0) VAL [\old(x)=1, x=1] [L15] CALL g(x - 1) VAL [\old(x)=0] [L12] COND TRUE x == 0 [L13] return 1; VAL [\old(x)=0, \result=1, x=0] [L15] RET g(x - 1) VAL [\old(x)=1, x=1] Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution [2023-11-19 07:38:06,846 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-19 07:38:06,849 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) VAL [x=1] [L21] CALL g(x) VAL [\old(x)=1] [L12] COND FALSE !(x == 0) VAL [\old(x)=1, x=1] [L15] CALL g(x - 1) VAL [\old(x)=0] [L12] COND TRUE x == 0 [L13] return 1; VAL [\old(x)=0, \result=1, x=0] [L15] RET g(x - 1) VAL [\old(x)=1, x=1] Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-11-19 07:38:06,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:07,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:07,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b889f5-60c5-49cb-9d27-fe16feb6352d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)