./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:29:35,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:29:35,110 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-12 02:29:35,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:29:35,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:29:35,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:29:35,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:29:35,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:29:35,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:29:35,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:29:35,151 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:29:35,152 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-12 02:29:35,153 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-12 02:29:35,153 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-12 02:29:35,154 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-12 02:29:35,154 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-12 02:29:35,155 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-12 02:29:35,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:29:35,156 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-12 02:29:35,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:29:35,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:29:35,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-12 02:29:35,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-12 02:29:35,161 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-12 02:29:35,161 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:29:35,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:29:35,162 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-12 02:29:35,162 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:29:35,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:29:35,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:29:35,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:29:35,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:29:35,166 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-12 02:29:35,167 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_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2023-11-12 02:29:35,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:29:35,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:29:35,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:29:35,473 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:29:35,474 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:29:35,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2023-11-12 02:29:38,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:29:38,833 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:29:38,833 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2023-11-12 02:29:38,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/data/38b89c277/d67898ef9d3c4b7d879eae63d873fbe5/FLAG8c9a52be4 [2023-11-12 02:29:38,860 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/data/38b89c277/d67898ef9d3c4b7d879eae63d873fbe5 [2023-11-12 02:29:38,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:29:38,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:29:38,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:38,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:29:38,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:29:38,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:38" (1/1) ... [2023-11-12 02:29:38,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3628eb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:38, skipping insertion in model container [2023-11-12 02:29:38,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:38" (1/1) ... [2023-11-12 02:29:38,910 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:29:39,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:39,104 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:29:39,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:39,136 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:29:39,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39 WrapperNode [2023-11-12 02:29:39,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:39,139 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:39,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:29:39,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:29:39,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,168 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 7 [2023-11-12 02:29:39,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:39,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:29:39,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:29:39,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:29:39,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:29:39,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:29:39,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:29:39,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:29:39,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (1/1) ... [2023-11-12 02:29:39,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:39,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:39,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:39,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-12 02:29:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2023-11-12 02:29:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2023-11-12 02:29:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2023-11-12 02:29:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2023-11-12 02:29:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:29:39,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:29:39,340 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:29:39,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:29:39,480 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:29:39,487 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:29:39,487 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:29:39,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:39 BoogieIcfgContainer [2023-11-12 02:29:39,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:29:39,490 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-12 02:29:39,491 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-12 02:29:39,494 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-12 02:29:39,495 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:29:39,496 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 12.11 02:29:38" (1/3) ... [2023-11-12 02:29:39,497 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43b00c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:29:39, skipping insertion in model container [2023-11-12 02:29:39,497 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:29:39,497 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:39" (2/3) ... [2023-11-12 02:29:39,497 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43b00c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:29:39, skipping insertion in model container [2023-11-12 02:29:39,498 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:29:39,498 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:39" (3/3) ... [2023-11-12 02:29:39,499 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2023-11-12 02:29:39,556 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-12 02:29:39,556 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-12 02:29:39,557 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-12 02:29:39,557 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-12 02:29:39,557 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-12 02:29:39,557 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-12 02:29:39,557 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-12 02:29:39,558 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-12 02:29:39,562 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:29:39,585 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:39,585 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:39,585 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:39,592 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:29:39,592 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:39,592 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-12 02:29:39,593 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:29:39,596 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:39,596 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:39,596 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:39,597 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:29:39,597 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:39,604 INFO L748 eck$LassoCheckResult]: Stem: 21#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 10#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 7#$Ultimate##0true [2023-11-12 02:29:39,605 INFO L750 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 4#$Ultimate##0true ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 7#$Ultimate##0true [2023-11-12 02:29:39,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2023-11-12 02:29:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:39,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123864690] [2023-11-12 02:29:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:39,700 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:39,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:39,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2023-11-12 02:29:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:39,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86435973] [2023-11-12 02:29:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:29:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:39,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:39,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86435973] [2023-11-12 02:29:39,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86435973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:39,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:39,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:39,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163250026] [2023-11-12 02:29:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:39,972 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:29:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:29:40,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:29:40,022 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:29:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:40,106 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2023-11-12 02:29:40,108 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2023-11-12 02:29:40,112 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:40,118 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2023-11-12 02:29:40,119 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-12 02:29:40,120 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2023-11-12 02:29:40,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2023-11-12 02:29:40,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:40,122 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-12 02:29:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2023-11-12 02:29:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 02:29:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:29:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-11-12 02:29:40,178 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-12 02:29:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:40,183 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-12 02:29:40,183 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-12 02:29:40,183 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2023-11-12 02:29:40,185 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:40,185 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:40,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:40,186 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:29:40,186 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:40,187 INFO L748 eck$LassoCheckResult]: Stem: 80#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 77#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 66#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 67#$Ultimate##0 [2023-11-12 02:29:40,187 INFO L750 eck$LassoCheckResult]: Loop: 67#$Ultimate##0 ~j := #in~j; 74#L18 assume !(~j <= 0); 72#L20 call #t~ret3 := rec1(~j);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume !(~i <= 0); 69#L14 call #t~ret0 := rec1(~i - 2);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#28#return; 70#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#30#return; 71#L14-2 call #t~ret2 := rec1(#t~ret1);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#32#return; 75#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 76#rec1FINAL assume true; 81#rec1EXIT >#34#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 67#$Ultimate##0 [2023-11-12 02:29:40,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2023-11-12 02:29:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:40,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061045533] [2023-11-12 02:29:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:40,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2023-11-12 02:29:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:40,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559398572] [2023-11-12 02:29:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2023-11-12 02:29:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177121293] [2023-11-12 02:29:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:40,289 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:40,762 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:40,763 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:40,763 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:40,764 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:40,764 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:29:40,764 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:40,764 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:40,764 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:40,764 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2023-11-12 02:29:40,765 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:40,765 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:40,782 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:40,791 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:40,794 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:40,798 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:40,809 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:40,857 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:40,858 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:29:40,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:40,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:40,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-12 02:29:40,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:40,882 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:40,910 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:40,910 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:40,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:40,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:40,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:40,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:40,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-12 02:29:40,941 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:40,941 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:40,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:40,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:40,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:40,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:40,960 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:40,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-12 02:29:40,988 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:40,988 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:40,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:40,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-12 02:29:41,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:41,008 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:41,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:41,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-12 02:29:41,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:29:41,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:41,069 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:29:41,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:41,079 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:41,080 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:41,080 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:41,080 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:41,080 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:29:41,080 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,080 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:41,080 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:41,080 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2023-11-12 02:29:41,081 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:41,081 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:41,082 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:41,088 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:41,090 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:41,094 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:41,103 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:41,142 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:41,147 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:29:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-12 02:29:41,161 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:41,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:41,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:41,175 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:41,176 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:41,176 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:41,178 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:41,178 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:41,196 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:41,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,215 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:41,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-12 02:29:41,227 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:41,228 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:41,228 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:41,228 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:41,228 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:41,229 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:41,229 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:41,239 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:41,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-12 02:29:41,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:41,268 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:41,268 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:41,269 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:41,269 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:41,269 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:41,270 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:41,270 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:41,290 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:41,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-11-12 02:29:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,306 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:41,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-12 02:29:41,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:41,318 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:41,318 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:41,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:41,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:41,320 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:41,320 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:41,330 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:29:41,335 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-12 02:29:41,335 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-12 02:29:41,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:41,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:41,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-12 02:29:41,373 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:29:41,374 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:29:41,374 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:29:41,374 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2023-11-12 02:29:41,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:41,386 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:29:41,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:41,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:29:41,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:41,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:29:41,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:29:41,748 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2023-11-12 02:29:41,751 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:41,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,135 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 102 states and 148 transitions. Complement of second has 42 states. [2023-11-12 02:29:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2023-11-12 02:29:42,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2023-11-12 02:29:42,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2023-11-12 02:29:42,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,143 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2023-11-12 02:29:42,144 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,144 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2023-11-12 02:29:42,151 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:42,157 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2023-11-12 02:29:42,157 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-11-12 02:29:42,157 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2023-11-12 02:29:42,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2023-11-12 02:29:42,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:42,158 INFO L218 hiAutomatonCegarLoop]: Abstraction has 90 states and 136 transitions. [2023-11-12 02:29:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2023-11-12 02:29:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2023-11-12 02:29:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2023-11-12 02:29:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2023-11-12 02:29:42,175 INFO L240 hiAutomatonCegarLoop]: Abstraction has 63 states and 99 transitions. [2023-11-12 02:29:42,175 INFO L428 stractBuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2023-11-12 02:29:42,176 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-12 02:29:42,176 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2023-11-12 02:29:42,178 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:42,178 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:42,178 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:42,179 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:42,179 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-12 02:29:42,179 INFO L748 eck$LassoCheckResult]: Stem: 385#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 378#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 346#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 355#$Ultimate##0 ~j := #in~j; 356#L18 assume !(~j <= 0); 350#L20 call #t~ret3 := rec1(~j);< 349#$Ultimate##0 ~i := #in~i; 351#L12 assume !(~i <= 0); 360#L14 call #t~ret0 := rec1(~i - 2);< 376#$Ultimate##0 [2023-11-12 02:29:42,179 INFO L750 eck$LassoCheckResult]: Loop: 376#$Ultimate##0 ~i := #in~i; 393#L12 assume !(~i <= 0); 359#L14 call #t~ret0 := rec1(~i - 2);< 376#$Ultimate##0 [2023-11-12 02:29:42,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2023-11-12 02:29:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:42,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035590302] [2023-11-12 02:29:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:42,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2023-11-12 02:29:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678078289] [2023-11-12 02:29:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2023-11-12 02:29:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31365896] [2023-11-12 02:29:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:42,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:42,250 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:42,250 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:42,250 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:42,251 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:42,251 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:29:42,251 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,251 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:42,251 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:42,251 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2023-11-12 02:29:42,251 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:42,251 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:42,252 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,255 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,257 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,259 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,261 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,267 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,304 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:42,304 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:29:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:42,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-12 02:29:42,335 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:42,335 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:42,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-12 02:29:42,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:42,352 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:42,370 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:42,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,374 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-12 02:29:42,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:42,380 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:42,392 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:42,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2023-11-12 02:29:42,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-12 02:29:42,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:42,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,414 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:42,415 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:42,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-12 02:29:42,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:42,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,474 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,478 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:29:42,478 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:42,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-12 02:29:42,513 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:29:42,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,522 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:42,522 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:42,522 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:42,522 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:42,523 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:29:42,523 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,523 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:42,523 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:42,523 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2023-11-12 02:29:42,523 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:42,523 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:42,524 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,527 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,531 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,533 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,535 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,541 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:42,575 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:42,576 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:29:42,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,581 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:42,594 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:42,594 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:42,594 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:42,594 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:42,594 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:42,595 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:42,595 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:42,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-12 02:29:42,607 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:42,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,634 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:42,647 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:42,647 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:42,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:42,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:42,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:42,648 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:42,649 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-12 02:29:42,663 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:42,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,673 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-12 02:29:42,686 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:42,699 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:42,699 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:42,700 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:42,700 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:42,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:42,701 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:42,701 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:42,711 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:42,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-12 02:29:42,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:42,728 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:42,728 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:42,728 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:42,728 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:42,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:42,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:42,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:42,735 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:42,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-12 02:29:42,744 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:42,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:42,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:42,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:42,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:42,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:42,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:42,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:42,773 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:29:42,775 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-12 02:29:42,775 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-12 02:29:42,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:42,776 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:42,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-12 02:29:42,779 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:29:42,779 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:29:42,779 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:29:42,780 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-12 02:29:42,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:42,783 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:29:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:42,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:29:42,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:42,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:42,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:42,887 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-11-12 02:29:42,887 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:42,944 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 109 states and 166 transitions. Complement of second has 13 states. [2023-11-12 02:29:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2023-11-12 02:29:42,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2023-11-12 02:29:42,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2023-11-12 02:29:42,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,947 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2023-11-12 02:29:42,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:42,947 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2023-11-12 02:29:42,952 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:42,957 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2023-11-12 02:29:42,957 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2023-11-12 02:29:42,957 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2023-11-12 02:29:42,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2023-11-12 02:29:42,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:42,959 INFO L218 hiAutomatonCegarLoop]: Abstraction has 97 states and 154 transitions. [2023-11-12 02:29:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2023-11-12 02:29:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2023-11-12 02:29:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2023-11-12 02:29:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2023-11-12 02:29:42,973 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 144 transitions. [2023-11-12 02:29:42,973 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2023-11-12 02:29:42,974 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-12 02:29:42,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2023-11-12 02:29:42,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:42,976 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:42,976 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:42,977 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:42,977 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-12 02:29:42,977 INFO L748 eck$LassoCheckResult]: Stem: 633#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 623#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 585#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 602#$Ultimate##0 ~j := #in~j; 603#L18 assume !(~j <= 0); 628#L20 call #t~ret3 := rec1(~j);< 632#$Ultimate##0 ~i := #in~i; 650#L12 assume !(~i <= 0); 608#L14 call #t~ret0 := rec1(~i - 2);< 648#$Ultimate##0 ~i := #in~i; 653#L12 assume ~i <= 0;#res := 0; 652#rec1FINAL assume true; 647#rec1EXIT >#28#return; 595#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 589#$Ultimate##0 [2023-11-12 02:29:42,978 INFO L750 eck$LassoCheckResult]: Loop: 589#$Ultimate##0 ~i := #in~i; 597#L12 assume !(~i <= 0); 591#L14 call #t~ret0 := rec1(~i - 2);< 589#$Ultimate##0 [2023-11-12 02:29:42,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2023-11-12 02:29:42,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:42,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532951613] [2023-11-12 02:29:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:42,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:42,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2023-11-12 02:29:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:42,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750596057] [2023-11-12 02:29:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:43,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:43,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:43,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2023-11-12 02:29:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:43,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815011806] [2023-11-12 02:29:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:43,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:29:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:29:43,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815011806] [2023-11-12 02:29:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815011806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:29:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160115750] [2023-11-12 02:29:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:43,184 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:43,184 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:43,184 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:43,184 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:43,184 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:29:43,184 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,185 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:43,185 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:43,185 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2023-11-12 02:29:43,185 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:43,185 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:43,186 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,189 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,196 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,199 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,201 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,204 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,242 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:43,242 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:29:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:43,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-12 02:29:43,284 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:43,284 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:43,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,294 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:43,298 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:43,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-12 02:29:43,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,340 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-12 02:29:43,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:29:43,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:43,434 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:29:43,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,444 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:43,444 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:43,444 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:43,444 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:43,444 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:29:43,445 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,445 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:43,445 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:43,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2023-11-12 02:29:43,445 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:43,445 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:43,446 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,449 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,456 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,459 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,461 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,463 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:43,502 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:43,502 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:29:43,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,509 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:43,522 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:43,522 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:43,522 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:43,522 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:43,522 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:43,523 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:43,523 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:43,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-12 02:29:43,535 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:43,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,545 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,552 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:43,564 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:43,564 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:43,565 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:43,565 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:43,565 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:43,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-12 02:29:43,566 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:43,566 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:43,575 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:29:43,578 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-12 02:29:43,578 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-12 02:29:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:43,583 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:43,585 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:29:43,585 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:29:43,585 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:29:43,585 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-12 02:29:43,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-12 02:29:43,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,594 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:29:43,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:43,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:29:43,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:43,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:43,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:43,759 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:43,760 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:29:43,848 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 133 states and 208 transitions. Complement of second has 14 states. [2023-11-12 02:29:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:29:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2023-11-12 02:29:43,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2023-11-12 02:29:43,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:43,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2023-11-12 02:29:43,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:43,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2023-11-12 02:29:43,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:43,851 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2023-11-12 02:29:43,855 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:43,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2023-11-12 02:29:43,861 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2023-11-12 02:29:43,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2023-11-12 02:29:43,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2023-11-12 02:29:43,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:43,862 INFO L218 hiAutomatonCegarLoop]: Abstraction has 121 states and 196 transitions. [2023-11-12 02:29:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2023-11-12 02:29:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-11-12 02:29:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 76 states have internal predecessors, (80), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2023-11-12 02:29:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2023-11-12 02:29:43,877 INFO L240 hiAutomatonCegarLoop]: Abstraction has 117 states and 186 transitions. [2023-11-12 02:29:43,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:43,878 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:29:43,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:43,960 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2023-11-12 02:29:43,960 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2023-11-12 02:29:43,967 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-11-12 02:29:43,974 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2023-11-12 02:29:43,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2023-11-12 02:29:43,982 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2023-11-12 02:29:43,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2023-11-12 02:29:43,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:43,983 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 194 transitions. [2023-11-12 02:29:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2023-11-12 02:29:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2023-11-12 02:29:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2023-11-12 02:29:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2023-11-12 02:29:44,002 INFO L240 hiAutomatonCegarLoop]: Abstraction has 105 states and 158 transitions. [2023-11-12 02:29:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:44,004 INFO L428 stractBuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2023-11-12 02:29:44,004 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-12 02:29:44,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2023-11-12 02:29:44,009 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-12 02:29:44,009 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:44,009 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:44,010 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:44,011 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:44,011 INFO L748 eck$LassoCheckResult]: Stem: 1209#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1197#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1157#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1194#$Ultimate##0 ~j := #in~j; 1225#L18 assume !(~j <= 0); 1217#L20 call #t~ret3 := rec1(~j);< 1224#$Ultimate##0 ~i := #in~i; 1223#L12 assume !(~i <= 0); 1178#L14 call #t~ret0 := rec1(~i - 2);< 1221#$Ultimate##0 ~i := #in~i; 1220#L12 assume !(~i <= 0); 1174#L14 call #t~ret0 := rec1(~i - 2);< 1219#$Ultimate##0 ~i := #in~i; 1206#L12 assume ~i <= 0;#res := 0; 1198#rec1FINAL assume true; 1199#rec1EXIT >#28#return; 1162#L14-1 [2023-11-12 02:29:44,011 INFO L750 eck$LassoCheckResult]: Loop: 1162#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1161#$Ultimate##0 ~i := #in~i; 1164#L12 assume ~i <= 0;#res := 0; 1253#rec1FINAL assume true; 1248#rec1EXIT >#30#return; 1175#L14-2 call #t~ret2 := rec1(#t~ret1);< 1195#$Ultimate##0 ~i := #in~i; 1251#L12 assume !(~i <= 0); 1177#L14 call #t~ret0 := rec1(~i - 2);< 1195#$Ultimate##0 ~i := #in~i; 1251#L12 assume ~i <= 0;#res := 0; 1250#rec1FINAL assume true; 1249#rec1EXIT >#28#return; 1162#L14-1 [2023-11-12 02:29:44,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2023-11-12 02:29:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896511738] [2023-11-12 02:29:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,019 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:44,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:44,026 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2023-11-12 02:29:44,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:44,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346435615] [2023-11-12 02:29:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:29:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:29:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:29:44,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346435615] [2023-11-12 02:29:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346435615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291085519] [2023-11-12 02:29:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:44,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:44,089 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:44,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-12 02:29:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:29:44,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:44,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:29:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291085519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:44,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:29:44,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-12 02:29:44,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883499902] [2023-11-12 02:29:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:44,155 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:29:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:44,156 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:29:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:44,216 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2023-11-12 02:29:44,216 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2023-11-12 02:29:44,219 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:44,224 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2023-11-12 02:29:44,224 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2023-11-12 02:29:44,227 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2023-11-12 02:29:44,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2023-11-12 02:29:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:44,228 INFO L218 hiAutomatonCegarLoop]: Abstraction has 115 states and 165 transitions. [2023-11-12 02:29:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2023-11-12 02:29:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2023-11-12 02:29:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.109375) internal successors, (71), 69 states have internal predecessors, (71), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2023-11-12 02:29:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2023-11-12 02:29:44,260 INFO L240 hiAutomatonCegarLoop]: Abstraction has 112 states and 162 transitions. [2023-11-12 02:29:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:44,263 INFO L428 stractBuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2023-11-12 02:29:44,263 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-12 02:29:44,263 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2023-11-12 02:29:44,265 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-12 02:29:44,265 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:44,265 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:44,268 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:44,268 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-12 02:29:44,268 INFO L748 eck$LassoCheckResult]: Stem: 1499#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1485#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1441#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1469#$Ultimate##0 ~j := #in~j; 1510#L18 assume !(~j <= 0); 1455#L20 call #t~ret3 := rec1(~j);< 1509#$Ultimate##0 ~i := #in~i; 1508#L12 assume !(~i <= 0); 1475#L14 call #t~ret0 := rec1(~i - 2);< 1507#$Ultimate##0 ~i := #in~i; 1505#L12 assume !(~i <= 0); 1472#L14 call #t~ret0 := rec1(~i - 2);< 1504#$Ultimate##0 ~i := #in~i; 1506#L12 assume ~i <= 0;#res := 0; 1486#rec1FINAL assume true; 1487#rec1EXIT >#28#return; 1479#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1480#$Ultimate##0 ~i := #in~i; 1517#L12 assume ~i <= 0;#res := 0; 1516#rec1FINAL assume true; 1514#rec1EXIT >#30#return; 1446#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#$Ultimate##0 ~i := #in~i; 1447#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1490#rec1EXIT >#32#return; 1491#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1519#rec1FINAL assume true; 1518#rec1EXIT >#28#return; 1476#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1496#$Ultimate##0 [2023-11-12 02:29:44,269 INFO L750 eck$LassoCheckResult]: Loop: 1496#$Ultimate##0 ~i := #in~i; 1521#L12 assume !(~i <= 0); 1473#L14 call #t~ret0 := rec1(~i - 2);< 1496#$Ultimate##0 [2023-11-12 02:29:44,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2023-11-12 02:29:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:44,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78443126] [2023-11-12 02:29:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:44,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2023-11-12 02:29:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227292206] [2023-11-12 02:29:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:44,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:44,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2023-11-12 02:29:44,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696080592] [2023-11-12 02:29:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:29:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:29:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:29:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:29:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 02:29:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696080592] [2023-11-12 02:29:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696080592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195866173] [2023-11-12 02:29:44,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:44,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:44,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:44,556 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:44,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-12 02:29:44,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:44,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:44,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:44,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 02:29:44,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 02:29:44,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195866173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:44,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:44,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-12 02:29:44,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530139959] [2023-11-12 02:29:44,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:44,814 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:44,814 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:44,814 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:44,815 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:44,815 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:29:44,815 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:44,815 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:44,815 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:44,816 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2023-11-12 02:29:44,816 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:44,816 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:44,817 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,819 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,822 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,825 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,827 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,829 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:44,865 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:44,865 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:29:44,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:44,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:44,868 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:44,872 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:44,872 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-12 02:29:44,912 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:44,912 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:44,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:44,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:44,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:44,918 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:44,929 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:44,929 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:44,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-12 02:29:44,959 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:44,959 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:44,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2023-11-12 02:29:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:44,964 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:44,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:44,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:44,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-12 02:29:45,004 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:45,004 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:45,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,013 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,020 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:45,020 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-12 02:29:45,052 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:45,052 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:45,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,062 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:45,066 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:45,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-12 02:29:45,108 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:45,108 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:45,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,118 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:45,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:45,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-12 02:29:45,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,161 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,165 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:29:45,165 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:45,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-12 02:29:45,198 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:29:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,203 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:45,203 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:45,203 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:45,203 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:45,203 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:29:45,203 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,203 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:45,203 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:45,203 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2023-11-12 02:29:45,204 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:45,204 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:45,205 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,209 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,213 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,216 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,218 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,221 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:45,259 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:45,259 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:29:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,261 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,269 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-12 02:29:45,282 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,282 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,282 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,283 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,283 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,283 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,283 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,290 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:45,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,294 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-12 02:29:45,297 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,307 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,307 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,308 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,309 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,310 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:45,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2023-11-12 02:29:45,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,315 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-12 02:29:45,317 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,327 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,327 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,327 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,328 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,328 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,338 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:45,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2023-11-12 02:29:45,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,342 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-12 02:29:45,345 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,356 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,356 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,357 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,362 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:45,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2023-11-12 02:29:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,367 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-12 02:29:45,369 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,380 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,380 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,381 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,381 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,403 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-12 02:29:45,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,416 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,424 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-12 02:29:45,436 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:45,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:45,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:45,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:45,436 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:45,438 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:45,438 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:45,443 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:29:45,445 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-12 02:29:45,445 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-12 02:29:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:45,449 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:45,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-12 02:29:45,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:29:45,452 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:29:45,452 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:29:45,452 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-12 02:29:45,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2023-11-12 02:29:45,459 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:29:45,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:45,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:45,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:45,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:45,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:45,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:45,936 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:45,936 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,000 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2023-11-12 02:29:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-11-12 02:29:46,003 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:46,004 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:46,004 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:29:46,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:46,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:46,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:46,398 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:46,398 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,459 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2023-11-12 02:29:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-11-12 02:29:46,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:46,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:46,465 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:29:46,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:46,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:46,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:46,808 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:46,808 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,901 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 157 states and 219 transitions. Complement of second has 13 states. [2023-11-12 02:29:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2023-11-12 02:29:46,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:46,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:46,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2023-11-12 02:29:46,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:46,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2023-11-12 02:29:46,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:46,906 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2023-11-12 02:29:46,908 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2023-11-12 02:29:46,912 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2023-11-12 02:29:46,912 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2023-11-12 02:29:46,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2023-11-12 02:29:46,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2023-11-12 02:29:46,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:46,913 INFO L218 hiAutomatonCegarLoop]: Abstraction has 139 states and 201 transitions. [2023-11-12 02:29:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2023-11-12 02:29:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2023-11-12 02:29:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2023-11-12 02:29:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2023-11-12 02:29:46,925 INFO L240 hiAutomatonCegarLoop]: Abstraction has 120 states and 170 transitions. [2023-11-12 02:29:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:29:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:29:46,926 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:29:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:46,983 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-11-12 02:29:46,983 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2023-11-12 02:29:46,985 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-11-12 02:29:46,986 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2023-11-12 02:29:46,986 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2023-11-12 02:29:46,986 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2023-11-12 02:29:46,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2023-11-12 02:29:46,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-12 02:29:46,987 INFO L218 hiAutomatonCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-11-12 02:29:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2023-11-12 02:29:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-11-12 02:29:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-12 02:29:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-12 02:29:46,992 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-12 02:29:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:29:46,993 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-12 02:29:46,993 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-12 02:29:46,993 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2023-11-12 02:29:46,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-11-12 02:29:46,994 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:29:46,994 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:29:46,995 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:46,996 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-12 02:29:46,996 INFO L748 eck$LassoCheckResult]: Stem: 2809#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2803#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 2779#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 2788#$Ultimate##0 ~j := #in~j; 2789#L18 assume !(~j <= 0); 2801#L20 call #t~ret3 := rec1(~j);< 2827#$Ultimate##0 ~i := #in~i; 2824#L12 assume !(~i <= 0); 2796#L14 call #t~ret0 := rec1(~i - 2);< 2826#$Ultimate##0 ~i := #in~i; 2831#L12 assume ~i <= 0;#res := 0; 2830#rec1FINAL assume true; 2805#rec1EXIT >#28#return; 2800#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2802#$Ultimate##0 ~i := #in~i; 2823#L12 assume ~i <= 0;#res := 0; 2822#rec1FINAL assume true; 2816#rec1EXIT >#30#return; 2814#L14-2 call #t~ret2 := rec1(#t~ret1);< 2799#$Ultimate##0 ~i := #in~i; 2818#L12 assume ~i <= 0;#res := 0; 2815#rec1FINAL assume true; 2813#rec1EXIT >#32#return; 2812#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2811#rec1FINAL assume true; 2810#rec1EXIT >#34#return; 2778#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2780#$Ultimate##0 ~j := #in~j; 2791#L18 assume !(~j <= 0); 2784#L20 call #t~ret3 := rec1(~j);< 2781#$Ultimate##0 [2023-11-12 02:29:46,996 INFO L750 eck$LassoCheckResult]: Loop: 2781#$Ultimate##0 ~i := #in~i; 2783#L12 assume !(~i <= 0); 2782#L14 call #t~ret0 := rec1(~i - 2);< 2781#$Ultimate##0 [2023-11-12 02:29:46,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2023-11-12 02:29:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:46,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600536688] [2023-11-12 02:29:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-12 02:29:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:29:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:29:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:29:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:29:47,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600536688] [2023-11-12 02:29:47,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600536688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:47,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292427493] [2023-11-12 02:29:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,112 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-12 02:29:47,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:47,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:47,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:47,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:29:47,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:29:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292427493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:47,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-12 02:29:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967331301] [2023-11-12 02:29:47,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:47,358 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-12 02:29:47,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:47,359 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2023-11-12 02:29:47,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:47,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631554339] [2023-11-12 02:29:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:47,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:47,362 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:29:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:29:47,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:29:47,398 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:47,399 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:47,399 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:47,399 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:47,399 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-12 02:29:47,399 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,400 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:47,400 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:47,400 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2023-11-12 02:29:47,400 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:47,400 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:47,402 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,405 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,411 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,414 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,417 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,420 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,456 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:47,457 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-12 02:29:47,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,458 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:47,468 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:47,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-12 02:29:47,496 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-12 02:29:47,496 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-12 02:29:47,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,501 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,505 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-12 02:29:47,505 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:47,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-12 02:29:47,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:47,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,537 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-12 02:29:47,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-12 02:29:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-12 02:29:47,575 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-12 02:29:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:47,580 INFO L210 LassoAnalysis]: Preferences: [2023-11-12 02:29:47,580 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-12 02:29:47,580 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-12 02:29:47,580 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-12 02:29:47,580 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-12 02:29:47,580 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,580 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-12 02:29:47,580 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-12 02:29:47,580 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2023-11-12 02:29:47,581 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-12 02:29:47,581 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-12 02:29:47,582 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,588 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,591 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,593 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,596 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,598 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-12 02:29:47,627 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-12 02:29:47,627 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-12 02:29:47,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,629 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,636 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-12 02:29:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2023-11-12 02:29:47,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-12 02:29:47,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-12 02:29:47,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-12 02:29:47,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-12 02:29:47,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-12 02:29:47,651 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-12 02:29:47,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-12 02:29:47,666 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-12 02:29:47,676 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-12 02:29:47,677 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-12 02:29:47,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:29:47,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:47,679 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:47,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2023-11-12 02:29:47,681 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-12 02:29:47,681 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-12 02:29:47,681 INFO L513 LassoAnalysis]: Proved termination. [2023-11-12 02:29:47,681 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-12 02:29:47,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:47,688 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-12 02:29:47,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:47,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:47,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,028 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:48,028 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,102 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2023-11-12 02:29:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2023-11-12 02:29:48,104 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:48,105 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:48,105 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:29:48,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:48,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:48,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,421 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:48,422 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,486 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2023-11-12 02:29:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2023-11-12 02:29:48,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:48,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:48,491 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-12 02:29:48,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:29:48,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:48,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,835 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-12 02:29:48,835 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,928 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 78 states and 90 transitions. Complement of second has 13 states. [2023-11-12 02:29:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-12 02:29:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:29:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2023-11-12 02:29:48,932 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2023-11-12 02:29:48,932 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:48,932 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2023-11-12 02:29:48,933 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:48,933 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2023-11-12 02:29:48,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-12 02:29:48,935 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2023-11-12 02:29:48,937 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-12 02:29:48,937 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2023-11-12 02:29:48,937 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-12 02:29:48,937 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-12 02:29:48,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-12 02:29:48,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:48,938 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:29:48,938 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:29:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:29:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:29:48,939 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:29:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:48,939 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-11-12 02:29:48,939 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-11-12 02:29:48,940 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-12 02:29:48,940 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 02:29:48,940 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-12 02:29:48,940 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-12 02:29:48,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-12 02:29:48,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:48,940 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:29:48,941 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:29:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:29:48,942 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:29:48,942 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-12 02:29:48,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-12 02:29:48,942 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-12 02:29:48,942 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-12 02:29:48,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.11 02:29:48 BoogieIcfgContainer [2023-11-12 02:29:48,952 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-12 02:29:48,952 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:29:48,952 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:29:48,953 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:29:48,953 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:39" (3/4) ... [2023-11-12 02:29:48,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 02:29:48,956 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:29:48,957 INFO L158 Benchmark]: Toolchain (without parser) took 10085.76ms. Allocated memory was 153.1MB in the beginning and 243.3MB in the end (delta: 90.2MB). Free memory was 113.4MB in the beginning and 197.0MB in the end (delta: -83.6MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2023-11-12 02:29:48,960 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 153.1MB. Free memory was 99.0MB in the beginning and 98.8MB in the end (delta: 151.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:29:48,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.07ms. Allocated memory is still 153.1MB. Free memory was 113.0MB in the beginning and 104.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 02:29:48,961 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.77ms. Allocated memory is still 153.1MB. Free memory was 103.7MB in the beginning and 102.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:29:48,961 INFO L158 Benchmark]: Boogie Preprocessor took 20.31ms. Allocated memory is still 153.1MB. Free memory was 102.5MB in the beginning and 101.6MB in the end (delta: 923.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:29:48,962 INFO L158 Benchmark]: RCFGBuilder took 298.92ms. Allocated memory is still 153.1MB. Free memory was 101.6MB in the beginning and 92.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 02:29:48,962 INFO L158 Benchmark]: BuchiAutomizer took 9461.28ms. Allocated memory was 153.1MB in the beginning and 243.3MB in the end (delta: 90.2MB). Free memory was 92.5MB in the beginning and 197.0MB in the end (delta: -104.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:29:48,962 INFO L158 Benchmark]: Witness Printer took 4.28ms. Allocated memory is still 243.3MB. Free memory is still 197.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:29:48,965 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 153.1MB. Free memory was 99.0MB in the beginning and 98.8MB in the end (delta: 151.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.07ms. Allocated memory is still 153.1MB. Free memory was 113.0MB in the beginning and 104.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.77ms. Allocated memory is still 153.1MB. Free memory was 103.7MB in the beginning and 102.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.31ms. Allocated memory is still 153.1MB. Free memory was 102.5MB in the beginning and 101.6MB in the end (delta: 923.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 298.92ms. Allocated memory is still 153.1MB. Free memory was 101.6MB in the beginning and 92.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 9461.28ms. Allocated memory was 153.1MB in the beginning and 243.3MB in the end (delta: 90.2MB). Free memory was 92.5MB in the beginning and 197.0MB in the end (delta: -104.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.28ms. Allocated memory is still 243.3MB. Free memory is still 197.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.4s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 4.8s. Construction of modules took 0.3s. Büchi inclusion checks took 3.9s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 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 [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 221 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 198 mSDsluCounter, 528 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 330 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 317 IncrementalHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 198 mSDtfsCounter, 317 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf93 smp100 dnf100 smp100 tf113 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 48ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-12 02:29:48,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:49,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:49,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-12 02:29:49,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3e27cf-8508-4213-b3cb-22f825ac2974/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE