./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0e0057cc 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_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme --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 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:04:46,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:46,354 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-26 12:04:46,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:46,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:46,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:46,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:46,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:46,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:46,430 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:46,432 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:46,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:46,433 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:46,435 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-26 12:04:46,436 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-26 12:04:46,436 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-26 12:04:46,437 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-26 12:04:46,437 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-26 12:04:46,438 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-26 12:04:46,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:46,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-26 12:04:46,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:46,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:46,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-26 12:04:46,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-26 12:04:46,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-26 12:04:46,441 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:04:46,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:04:46,442 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-26 12:04:46,443 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:46,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:46,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:46,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:46,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:46,445 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-26 12:04:46,446 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_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 [2023-11-26 12:04:46,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:46,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:46,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:46,849 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:46,850 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:46,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2023-11-26 12:04:49,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:04:50,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:04:50,232 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2023-11-26 12:04:50,247 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/data/62991aceb/574869180be144428ea87142c5e98e2a/FLAGb1f226151 [2023-11-26 12:04:50,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/data/62991aceb/574869180be144428ea87142c5e98e2a [2023-11-26 12:04:50,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:04:50,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:04:50,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:50,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:04:50,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:04:50,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211e702a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50, skipping insertion in model container [2023-11-26 12:04:50,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,298 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:04:50,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:50,477 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:04:50,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:50,502 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:04:50,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50 WrapperNode [2023-11-26 12:04:50,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:50,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:50,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:04:50,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:04:50,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,537 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 7 [2023-11-26 12:04:50,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:50,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:04:50,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:04:50,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:04:50,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,552 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,561 INFO L175 MemorySlicer]: No memory access in input program. [2023-11-26 12:04:50,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:04:50,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:04:50,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:04:50,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:04:50,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (1/1) ... [2023-11-26 12:04:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:50,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:50,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-26 12:04:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-26 12:04:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-26 12:04:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-11-26 12:04:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-11-26 12:04:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:04:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:04:50,702 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:04:50,705 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:04:50,856 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:04:50,866 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:04:50,866 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:04:50,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:50 BoogieIcfgContainer [2023-11-26 12:04:50,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:04:50,869 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-26 12:04:50,869 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-26 12:04:50,873 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-26 12:04:50,874 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 12:04:50,874 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.11 12:04:50" (1/3) ... [2023-11-26 12:04:50,875 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6c162b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.11 12:04:50, skipping insertion in model container [2023-11-26 12:04:50,875 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 12:04:50,875 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:50" (2/3) ... [2023-11-26 12:04:50,876 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6c162b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.11 12:04:50, skipping insertion in model container [2023-11-26 12:04:50,876 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 12:04:50,876 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:50" (3/3) ... [2023-11-26 12:04:50,878 INFO L332 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2023-11-26 12:04:50,949 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-26 12:04:50,949 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-26 12:04:50,949 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-26 12:04:50,949 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-26 12:04:50,949 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-26 12:04:50,950 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-26 12:04:50,950 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-26 12:04:50,950 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-26 12:04:50,954 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 12:04:50,975 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:50,976 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 12:04:50,976 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 12:04:50,983 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-26 12:04:50,983 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-11-26 12:04:50,984 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-26 12:04:50,984 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 12:04:50,987 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:50,988 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 12:04:50,988 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 12:04:50,988 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-26 12:04:50,989 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-11-26 12:04:50,997 INFO L748 eck$LassoCheckResult]: Stem: 18#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;havoc main_#t~nondet4#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 11#L26true call main_#t~ret5#1 := g(main_~x~0#1);< 19#$Ultimate##0true [2023-11-26 12:04:50,998 INFO L750 eck$LassoCheckResult]: Loop: 19#$Ultimate##0true ~x := #in~x; 5#L19true assume !(~x <= 0); 10#L20true call #t~ret2 := f(~x - 1);< 16#$Ultimate##0true ~x := #in~x; 15#L13true assume !(~x <= 0); 8#L14true call #t~ret0 := g(~x);< 19#$Ultimate##0true [2023-11-26 12:04:51,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 47743, now seen corresponding path program 1 times [2023-11-26 12:04:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670861087] [2023-11-26 12:04:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:51,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1158065693, now seen corresponding path program 1 times [2023-11-26 12:04:51,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:51,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303419235] [2023-11-26 12:04:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:51,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:51,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1788538341, now seen corresponding path program 1 times [2023-11-26 12:04:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791576916] [2023-11-26 12:04:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:51,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:51,379 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 12:04:51,380 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 12:04:51,380 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 12:04:51,381 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 12:04:51,381 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 12:04:51,381 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,381 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 12:04:51,382 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 12:04:51,382 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2023-11-26 12:04:51,382 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 12:04:51,382 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 12:04:51,402 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,415 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,419 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,425 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,429 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,447 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,455 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,463 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:51,540 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 12:04:51,540 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 12:04:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 12:04:51,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-26 12:04:51,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 12:04:51,591 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 12:04:51,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 12:04:51,615 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-26 12:04:51,645 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 12:04:51,645 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 12:04:51,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:51,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 12:04:51,670 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-26 12:04:51,729 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 12:04:51,729 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 12:04:51,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,822 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 12:04:51,822 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-26 12:04:51,848 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 12:04:51,848 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 12:04:51,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:51,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,871 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 12:04:51,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-26 12:04:51,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:51,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:51,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:51,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 12:04:51,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 12:04:51,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-26 12:04:52,013 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 12:04:52,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,025 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 12:04:52,025 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 12:04:52,025 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 12:04:52,025 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 12:04:52,025 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 12:04:52,025 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,026 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 12:04:52,026 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 12:04:52,026 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2023-11-26 12:04:52,026 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 12:04:52,026 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 12:04:52,028 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,033 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,038 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,042 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,046 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,056 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,060 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,069 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 12:04:52,129 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 12:04:52,134 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 12:04:52,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,145 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-26 12:04:52,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-26 12:04:52,159 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,160 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,160 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,161 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,161 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,163 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,173 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,202 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 [2023-11-26 12:04:52,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-26 12:04:52,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,216 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,216 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,217 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,218 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,218 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,232 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,253 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 [2023-11-26 12:04:52,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-26 12:04:52,267 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,267 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,268 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,268 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,269 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,278 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,305 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-26 12:04:52,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-26 12:04:52,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,318 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,318 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,320 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,320 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,331 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-26 12:04:52,344 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 [2023-11-26 12:04:52,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,358 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,358 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,359 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,360 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,360 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,370 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-26 12:04:52,383 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 [2023-11-26 12:04:52,396 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,396 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,398 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,398 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,412 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 12:04:52,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,425 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-26 12:04:52,434 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 [2023-11-26 12:04:52,446 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 12:04:52,446 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 12:04:52,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 12:04:52,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 12:04:52,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 12:04:52,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 12:04:52,449 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 12:04:52,459 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 12:04:52,463 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-26 12:04:52,463 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-26 12:04:52,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 12:04:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:52,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:52,522 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 12:04:52,523 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 12:04:52,523 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 12:04:52,524 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2023-11-26 12:04:52,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-26 12:04:52,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,543 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 12:04:52,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:52,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:04:52,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:52,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:04:52,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:52,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:52,900 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2023-11-26 12:04:52,903 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:53,154 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 63 states and 82 transitions. Complement of second has 24 states. [2023-11-26 12:04:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-26 12:04:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2023-11-26 12:04:53,164 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 6 letters. [2023-11-26 12:04:53,165 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 12:04:53,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 9 letters. Loop has 6 letters. [2023-11-26 12:04:53,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 12:04:53,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 12 letters. [2023-11-26 12:04:53,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 12:04:53,167 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2023-11-26 12:04:53,174 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:53,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 46 states and 60 transitions. [2023-11-26 12:04:53,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2023-11-26 12:04:53,184 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2023-11-26 12:04:53,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 60 transitions. [2023-11-26 12:04:53,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 12:04:53,186 INFO L218 hiAutomatonCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-26 12:04:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 60 transitions. [2023-11-26 12:04:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-26 12:04:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-26 12:04:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-26 12:04:53,226 INFO L240 hiAutomatonCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-26 12:04:53,226 INFO L428 stractBuchiCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-26 12:04:53,226 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-26 12:04:53,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 57 transitions. [2023-11-26 12:04:53,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:53,229 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 12:04:53,229 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 12:04:53,230 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:53,230 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:53,231 INFO L748 eck$LassoCheckResult]: Stem: 197#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 189#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;havoc main_#t~nondet4#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 182#L26 call main_#t~ret5#1 := g(main_~x~0#1);< 188#$Ultimate##0 ~x := #in~x; 181#L19 assume !(~x <= 0); 167#L20 call #t~ret2 := f(~x - 1);< 187#$Ultimate##0 ~x := #in~x; 200#L13 assume !(~x <= 0); 178#L14 call #t~ret0 := g(~x);< 184#$Ultimate##0 ~x := #in~x; 177#L19 assume ~x <= 0;#res := 0; 179#gFINAL assume true; 185#gEXIT >#27#return; 173#L14-1 [2023-11-26 12:04:53,231 INFO L750 eck$LassoCheckResult]: Loop: 173#L14-1 call #t~ret1 := g(1 + ~x);< 176#$Ultimate##0 ~x := #in~x; 204#L19 assume !(~x <= 0); 174#L20 call #t~ret2 := f(~x - 1);< 203#$Ultimate##0 ~x := #in~x; 201#L13 assume !(~x <= 0); 183#L14 call #t~ret0 := g(~x);< 176#$Ultimate##0 ~x := #in~x; 204#L19 assume ~x <= 0;#res := 0; 199#gFINAL assume true; 202#gEXIT >#27#return; 173#L14-1 [2023-11-26 12:04:53,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1510789928, now seen corresponding path program 1 times [2023-11-26 12:04:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215007530] [2023-11-26 12:04:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 12:04:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:04:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215007530] [2023-11-26 12:04:53,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215007530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:53,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695726651] [2023-11-26 12:04:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:53,385 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 12:04:53,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1553130012, now seen corresponding path program 1 times [2023-11-26 12:04:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590941454] [2023-11-26 12:04:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:04:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:04:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590941454] [2023-11-26 12:04:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590941454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100681587] [2023-11-26 12:04:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:53,473 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-26 12:04:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:04:53,478 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. cyclomatic complexity: 14 Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:04:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:53,540 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-26 12:04:53,540 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 60 transitions. [2023-11-26 12:04:53,543 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:53,545 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 45 states and 56 transitions. [2023-11-26 12:04:53,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2023-11-26 12:04:53,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2023-11-26 12:04:53,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 56 transitions. [2023-11-26 12:04:53,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 12:04:53,547 INFO L218 hiAutomatonCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-26 12:04:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 56 transitions. [2023-11-26 12:04:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-26 12:04:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-26 12:04:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-26 12:04:53,554 INFO L240 hiAutomatonCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-26 12:04:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:04:53,556 INFO L428 stractBuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-26 12:04:53,556 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-26 12:04:53,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 56 transitions. [2023-11-26 12:04:53,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-26 12:04:53,558 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 12:04:53,558 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 12:04:53,560 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:53,560 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:53,560 INFO L748 eck$LassoCheckResult]: Stem: 311#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 304#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;havoc main_#t~nondet4#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 296#L26 call main_#t~ret5#1 := g(main_~x~0#1);< 303#$Ultimate##0 ~x := #in~x; 295#L19 assume !(~x <= 0); 282#L20 call #t~ret2 := f(~x - 1);< 302#$Ultimate##0 ~x := #in~x; 313#L13 assume !(~x <= 0); 293#L14 call #t~ret0 := g(~x);< 300#$Ultimate##0 ~x := #in~x; 292#L19 assume !(~x <= 0); 294#L20 call #t~ret2 := f(~x - 1);< 301#$Ultimate##0 ~x := #in~x; 322#L13 assume ~x <= 0;#res := 0; 319#fFINAL assume true; 318#fEXIT >#31#return; 279#L20-1 call #t~ret3 := f(~x - 2);< 307#$Ultimate##0 ~x := #in~x; 309#L13 assume ~x <= 0;#res := 0; 278#fFINAL assume true; 280#fEXIT >#33#return; 285#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 297#gFINAL assume true; 299#gEXIT >#27#return; 288#L14-1 [2023-11-26 12:04:53,564 INFO L750 eck$LassoCheckResult]: Loop: 288#L14-1 call #t~ret1 := g(1 + ~x);< 291#$Ultimate##0 ~x := #in~x; 317#L19 assume !(~x <= 0); 290#L20 call #t~ret2 := f(~x - 1);< 316#$Ultimate##0 ~x := #in~x; 314#L13 assume !(~x <= 0); 298#L14 call #t~ret0 := g(~x);< 291#$Ultimate##0 ~x := #in~x; 317#L19 assume !(~x <= 0); 290#L20 call #t~ret2 := f(~x - 1);< 316#$Ultimate##0 ~x := #in~x; 314#L13 assume ~x <= 0;#res := 0; 315#fFINAL assume true; 321#fEXIT >#31#return; 289#L20-1 call #t~ret3 := f(~x - 2);< 316#$Ultimate##0 ~x := #in~x; 314#L13 assume ~x <= 0;#res := 0; 315#fFINAL assume true; 321#fEXIT >#33#return; 285#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 297#gFINAL assume true; 299#gEXIT >#27#return; 288#L14-1 [2023-11-26 12:04:53,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1263731607, now seen corresponding path program 1 times [2023-11-26 12:04:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552202312] [2023-11-26 12:04:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:53,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1714809691, now seen corresponding path program 1 times [2023-11-26 12:04:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216829428] [2023-11-26 12:04:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,625 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:53,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 790919793, now seen corresponding path program 1 times [2023-11-26 12:04:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284820438] [2023-11-26 12:04:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:53,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:04:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:54,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:04:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:04:54,553 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,555 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,556 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,556 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-26 12:04:54,570 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,571 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,571 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,572 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-26 12:04:54,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.11 12:04:54 BoogieIcfgContainer [2023-11-26 12:04:54,578 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-26 12:04:54,579 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 12:04:54,579 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 12:04:54,579 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 12:04:54,580 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:50" (3/4) ... [2023-11-26 12:04:54,581 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-11-26 12:04:54,588 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,589 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,589 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,590 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-26 12:04:54,637 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 12:04:54,641 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 12:04:54,642 INFO L158 Benchmark]: Toolchain (without parser) took 4375.35ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 138.2MB in the beginning and 167.0MB in the end (delta: -28.7MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,642 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 130.0MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:04:54,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.33ms. Allocated memory is still 167.8MB. Free memory was 138.2MB in the beginning and 128.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.41ms. Allocated memory is still 167.8MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:04:54,646 INFO L158 Benchmark]: Boogie Preprocessor took 34.49ms. Allocated memory is still 167.8MB. Free memory was 127.2MB in the beginning and 125.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,646 INFO L158 Benchmark]: RCFGBuilder took 294.99ms. Allocated memory is still 167.8MB. Free memory was 125.7MB in the beginning and 134.3MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,647 INFO L158 Benchmark]: BuchiAutomizer took 3708.99ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 134.3MB in the beginning and 169.1MB in the end (delta: -34.8MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,649 INFO L158 Benchmark]: Witness Printer took 62.31ms. Allocated memory is still 201.3MB. Free memory was 169.1MB in the beginning and 167.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:04:54,652 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 130.0MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.33ms. Allocated memory is still 167.8MB. Free memory was 138.2MB in the beginning and 128.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.41ms. Allocated memory is still 167.8MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.49ms. Allocated memory is still 167.8MB. Free memory was 127.2MB in the beginning and 125.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 294.99ms. Allocated memory is still 167.8MB. Free memory was 125.7MB in the beginning and 134.3MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3708.99ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 134.3MB in the beginning and 169.1MB in the end (delta: -34.8MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. * Witness Printer took 62.31ms. Allocated memory is still 201.3MB. Free memory was 169.1MB in the beginning and 167.0MB 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~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret3 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~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret3 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~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret3 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 45 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 2.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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 [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 72 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 81 IncrementalHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 28 mSDtfsCounter, 81 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 38ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 14]: Nontermination argument in form of an infinite program execution. [2023-11-26 12:04:54,663 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,664 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,664 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,664 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-26 12:04:54,668 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,668 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,668 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,668 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated Nontermination argument in form of an infinite program execution. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) VAL [\old(x)=2] [L19] COND FALSE !(x <= 0) VAL [\old(x)=2, x=2] [L20] CALL, EXPR f(x - 1) VAL [\old(x)=1] [L13] COND FALSE !(x <= 0) VAL [\old(x)=1, x=1] [L14] CALL g(x) VAL [\old(x)=1] [L19] COND FALSE !(x <= 0) VAL [\old(x)=1, x=1] [L20] CALL, EXPR f(x - 1) VAL [\old(x)=0] [L13] COND TRUE x <= 0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L20] RET, EXPR f(x - 1) VAL [\old(x)=1, x=1] [L20] CALL, EXPR f(x - 2) VAL [\old(x)=-1] [L13] COND TRUE x <= 0 [L13] return 0; VAL [\old(x)=-1, \result=0, x=-1] [L20] RET, EXPR f(x - 2) VAL [\old(x)=1, x=1] [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) VAL [\old(x)=1, x=1] Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution [2023-11-26 12:04:54,673 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,673 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,674 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,674 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret0 could not be translated [2023-11-26 12:04:54,677 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,677 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret2 could not be translated [2023-11-26 12:04:54,677 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret3 could not be translated [2023-11-26 12:04:54,678 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: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) VAL [\old(x)=2] [L19] COND FALSE !(x <= 0) VAL [\old(x)=2, x=2] [L20] CALL, EXPR f(x - 1) VAL [\old(x)=1] [L13] COND FALSE !(x <= 0) VAL [\old(x)=1, x=1] [L14] CALL g(x) VAL [\old(x)=1] [L19] COND FALSE !(x <= 0) VAL [\old(x)=1, x=1] [L20] CALL, EXPR f(x - 1) VAL [\old(x)=0] [L13] COND TRUE x <= 0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L20] RET, EXPR f(x - 1) VAL [\old(x)=1, x=1] [L20] CALL, EXPR f(x - 2) VAL [\old(x)=-1] [L13] COND TRUE x <= 0 [L13] return 0; VAL [\old(x)=-1, \result=0, x=-1] [L20] RET, EXPR f(x - 2) VAL [\old(x)=1, x=1] [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) VAL [\old(x)=1, x=1] Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-11-26 12:04:54,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c573f15-9ded-4533-aef9-9410f6a24612/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)