./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:38,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:38,858 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-06 22:58:38,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:38,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:38,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:38,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:38,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:38,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:38,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:38,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:38,897 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-06 22:58:38,897 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-06 22:58:38,898 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-06 22:58:38,899 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-06 22:58:38,899 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-06 22:58:38,900 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-06 22:58:38,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:38,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-06 22:58:38,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:38,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:38,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-06 22:58:38,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-06 22:58:38,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-06 22:58:38,905 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:38,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:58:38,906 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-06 22:58:38,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:38,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:38,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:38,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:38,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:38,909 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-06 22:58:38,910 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_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2023-11-06 22:58:39,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:39,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:39,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:39,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:39,261 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:39,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2023-11-06 22:58:42,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:42,607 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:42,608 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2023-11-06 22:58:42,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/data/0a4afbd15/5a1587eb190b46baa377a3ef778c2a1c/FLAG6eefa7077 [2023-11-06 22:58:42,631 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/data/0a4afbd15/5a1587eb190b46baa377a3ef778c2a1c [2023-11-06 22:58:42,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:42,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:42,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:42,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:42,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:42,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0ce131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42, skipping insertion in model container [2023-11-06 22:58:42,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:42,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:42,800 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:58:42,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:42,825 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:58:42,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42 WrapperNode [2023-11-06 22:58:42,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:42,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:42,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:58:42,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:58:42,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,850 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 7 [2023-11-06 22:58:42,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:42,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:58:42,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:58:42,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:58:42,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,863 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,863 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:58:42,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:58:42,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:58:42,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:58:42,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (1/1) ... [2023-11-06 22:58:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:42,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:42,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:42,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-06 22:58:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2023-11-06 22:58:42,954 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2023-11-06 22:58:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2023-11-06 22:58:42,955 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2023-11-06 22:58:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:58:42,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:58:43,021 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:58:43,024 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:58:43,127 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:58:43,133 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:58:43,134 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:58:43,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43 BoogieIcfgContainer [2023-11-06 22:58:43,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:58:43,137 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-06 22:58:43,138 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-06 22:58:43,141 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-06 22:58:43,142 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:58:43,143 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.11 10:58:42" (1/3) ... [2023-11-06 22:58:43,144 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5899215e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.11 10:58:43, skipping insertion in model container [2023-11-06 22:58:43,144 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:58:43,144 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:42" (2/3) ... [2023-11-06 22:58:43,145 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5899215e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.11 10:58:43, skipping insertion in model container [2023-11-06 22:58:43,145 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:58:43,145 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43" (3/3) ... [2023-11-06 22:58:43,147 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2023-11-06 22:58:43,199 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-06 22:58:43,200 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-06 22:58:43,200 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-06 22:58:43,200 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-06 22:58:43,200 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-06 22:58:43,201 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-06 22:58:43,201 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-06 22:58:43,201 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-06 22:58:43,206 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) [2023-11-06 22:58:43,227 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:43,227 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:43,227 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:43,233 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-06 22:58:43,233 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:43,233 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-06 22:58:43,234 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) [2023-11-06 22:58:43,237 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:43,237 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:43,237 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:43,238 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-06 22:58:43,238 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:43,244 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 [2023-11-06 22:58:43,245 INFO L750 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j - 1);< 4#$Ultimate##0true ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3);< 7#$Ultimate##0true [2023-11-06 22:58:43,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2023-11-06 22:58:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:43,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058552351] [2023-11-06 22:58:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:43,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2023-11-06 22:58:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:43,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559554717] [2023-11-06 22:58:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,371 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:43,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1203131828, now seen corresponding path program 1 times [2023-11-06 22:58:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68685960] [2023-11-06 22:58:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:43,405 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:43,648 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:43,649 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:43,651 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:43,653 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:43,653 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:43,653 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,653 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:43,654 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:43,654 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2023-11-06 22:58:43,655 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:43,655 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:43,673 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:43,687 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:43,693 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:43,699 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:43,713 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:43,782 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:43,783 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:43,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-06 22:58:43,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:43,804 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:43,830 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:43,830 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:43,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:43,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:43,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:43,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:43,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-06 22:58:43,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:43,877 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:43,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:43,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-06 22:58:43,895 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:43,895 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:43,917 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:43,917 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:43,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:43,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:43,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,936 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:43,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:43,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-06 22:58:43,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:43,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:43,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,980 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:43,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:43,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-06 22:58:44,005 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:44,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2023-11-06 22:58:44,010 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:44,010 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:44,010 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:44,010 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:44,010 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:44,011 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,011 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:44,011 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:44,011 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2023-11-06 22:58:44,011 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:44,011 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:44,013 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:44,019 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:44,022 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:44,024 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:44,053 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:44,088 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:44,093 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:44,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:44,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-06 22:58:44,110 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 [2023-11-06 22:58:44,125 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:44,125 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:44,126 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:44,126 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:44,126 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:44,129 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:44,129 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:44,140 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:44,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:44,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:44,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:44,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-06 22:58:44,163 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 [2023-11-06 22:58:44,177 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:44,177 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:44,177 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:44,178 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:44,178 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:44,179 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:44,179 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:44,200 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:44,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:44,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:44,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:44,218 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 [2023-11-06 22:58:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-06 22:58:44,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:44,232 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:44,232 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:44,232 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:44,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:44,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:44,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:44,243 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:44,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:44,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:44,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:44,267 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 [2023-11-06 22:58:44,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:44,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:44,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:44,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:44,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:44,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:44,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:44,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-06 22:58:44,292 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:44,307 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-06 22:58:44,308 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-06 22:58:44,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:44,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:44,351 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:44,351 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:44,351 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:44,352 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2023-11-06 22:58:44,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-06 22:58:44,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:44,364 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:44,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:44,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:58:44,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:44,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:58:44,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:44,692 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2023-11-06 22:58:44,695 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. 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 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:58:45,131 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. 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 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 195 states and 280 transitions. Complement of second has 61 states. [2023-11-06 22:58:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-06 22:58:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:58:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2023-11-06 22:58:45,146 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-06 22:58:45,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:45,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-06 22:58:45,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:45,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 16 letters. [2023-11-06 22:58:45,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:45,151 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 195 states and 280 transitions. [2023-11-06 22:58:45,166 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:45,176 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 195 states to 83 states and 121 transitions. [2023-11-06 22:58:45,177 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2023-11-06 22:58:45,177 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2023-11-06 22:58:45,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 121 transitions. [2023-11-06 22:58:45,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:45,179 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 121 transitions. [2023-11-06 22:58:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 121 transitions. [2023-11-06 22:58:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2023-11-06 22:58:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2023-11-06 22:58:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2023-11-06 22:58:45,221 INFO L240 hiAutomatonCegarLoop]: Abstraction has 56 states and 84 transitions. [2023-11-06 22:58:45,222 INFO L428 stractBuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2023-11-06 22:58:45,222 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-06 22:58:45,222 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2023-11-06 22:58:45,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:45,224 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:45,224 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:45,225 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:45,225 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:58:45,225 INFO L748 eck$LassoCheckResult]: Stem: 391#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 384#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; 351#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 360#$Ultimate##0 ~j := #in~j; 362#L18 assume !(~j <= 0); 355#L20 call #t~ret3 := rec1(~j - 1);< 354#$Ultimate##0 ~i := #in~i; 356#L12 assume !(~i <= 0); 367#L14 call #t~ret0 := rec1(~i - 2);< 382#$Ultimate##0 [2023-11-06 22:58:45,226 INFO L750 eck$LassoCheckResult]: Loop: 382#$Ultimate##0 ~i := #in~i; 397#L12 assume !(~i <= 0); 370#L14 call #t~ret0 := rec1(~i - 2);< 382#$Ultimate##0 [2023-11-06 22:58:45,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2023-11-06 22:58:45,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:45,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661200805] [2023-11-06 22:58:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:45,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2023-11-06 22:58:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:45,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953772250] [2023-11-06 22:58:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:45,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2023-11-06 22:58:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:45,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339235626] [2023-11-06 22:58:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:45,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:45,346 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:45,347 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:45,347 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:45,347 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:45,347 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:45,347 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,347 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:45,348 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:45,348 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2023-11-06 22:58:45,348 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:45,348 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:45,349 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,352 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,354 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,357 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,359 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,362 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,394 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:45,395 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:45,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,396 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,405 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,406 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-06 22:58:45,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:45,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:45,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,452 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,453 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-06 22:58:45,481 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:45,482 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:45,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-06 22:58:45,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,519 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:45,519 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:45,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,542 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-06 22:58:45,568 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:45,568 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:45,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,584 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,584 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-06 22:58:45,609 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:45,610 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:45,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:45,631 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-06 22:58:45,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:45,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:45,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-06 22:58:45,744 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:45,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,748 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:45,748 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:45,748 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:45,748 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:45,748 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:45,748 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,749 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:45,749 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:45,749 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2023-11-06 22:58:45,749 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:45,749 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:45,750 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,760 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,762 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,765 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,770 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,776 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:45,824 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:45,824 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,832 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-06 22:58:45,838 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 [2023-11-06 22:58:45,851 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:45,851 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:45,851 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:45,851 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:45,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:45,852 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:45,852 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:45,865 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:45,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,875 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,892 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 [2023-11-06 22:58:45,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-06 22:58:45,904 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:45,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:45,905 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:45,905 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:45,905 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:45,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:45,906 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:45,915 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:45,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,921 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-06 22:58:45,930 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 [2023-11-06 22:58:45,945 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:45,946 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:45,946 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:45,946 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:45,946 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:45,947 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:45,947 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:45,969 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:45,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:45,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:45,978 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:45,986 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 [2023-11-06 22:58:45,998 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:45,998 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:45,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:45,999 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:45,999 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:45,999 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:45,999 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:46,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-06 22:58:46,017 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:46,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,030 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 [2023-11-06 22:58:46,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:46,043 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:46,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:46,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:46,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:46,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:46,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:46,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-06 22:58:46,054 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:46,057 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-06 22:58:46,057 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-06 22:58:46,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,076 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,078 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:46,079 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:46,079 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:46,079 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-06 22:58:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-06 22:58:46,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,088 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:46,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:46,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:46,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:46,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:46,191 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 [2023-11-06 22:58:46,191 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32 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) [2023-11-06 22:58:46,245 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32. 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 106 states and 150 transitions. Complement of second has 13 states. [2023-11-06 22:58:46,246 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 [2023-11-06 22:58:46,247 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) [2023-11-06 22:58:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2023-11-06 22:58:46,247 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 3 letters. [2023-11-06 22:58:46,248 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:46,248 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2023-11-06 22:58:46,248 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:46,248 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 6 letters. [2023-11-06 22:58:46,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:46,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 106 states and 150 transitions. [2023-11-06 22:58:46,253 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:46,258 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 106 states to 94 states and 138 transitions. [2023-11-06 22:58:46,258 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2023-11-06 22:58:46,258 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-11-06 22:58:46,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 138 transitions. [2023-11-06 22:58:46,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:46,260 INFO L218 hiAutomatonCegarLoop]: Abstraction has 94 states and 138 transitions. [2023-11-06 22:58:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 138 transitions. [2023-11-06 22:58:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2023-11-06 22:58:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 58 states have internal predecessors, (62), 27 states have call successors, (27), 15 states have call predecessors, (27), 12 states have return successors, (41), 16 states have call predecessors, (41), 22 states have call successors, (41) [2023-11-06 22:58:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2023-11-06 22:58:46,274 INFO L240 hiAutomatonCegarLoop]: Abstraction has 90 states and 130 transitions. [2023-11-06 22:58:46,274 INFO L428 stractBuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2023-11-06 22:58:46,274 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-06 22:58:46,275 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 130 transitions. [2023-11-06 22:58:46,277 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:46,277 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:46,277 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:46,278 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:46,278 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:58:46,278 INFO L748 eck$LassoCheckResult]: Stem: 629#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 619#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; 579#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 615#$Ultimate##0 ~j := #in~j; 593#L18 assume !(~j <= 0); 585#L20 call #t~ret3 := rec1(~j - 1);< 584#$Ultimate##0 ~i := #in~i; 586#L12 assume !(~i <= 0); 596#L14 call #t~ret0 := rec1(~i - 2);< 626#$Ultimate##0 ~i := #in~i; 643#L12 assume ~i <= 0;#res := 0; 641#rec1FINAL assume true; 640#rec1EXIT >#28#return; 603#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 617#$Ultimate##0 [2023-11-06 22:58:46,278 INFO L750 eck$LassoCheckResult]: Loop: 617#$Ultimate##0 ~i := #in~i; 638#L12 assume !(~i <= 0); 598#L14 call #t~ret0 := rec1(~i - 2);< 617#$Ultimate##0 [2023-11-06 22:58:46,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2023-11-06 22:58:46,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:46,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937105564] [2023-11-06 22:58:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:46,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:46,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:46,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:46,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2023-11-06 22:58:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:46,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875698646] [2023-11-06 22:58:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:46,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:46,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:46,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2023-11-06 22:58:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:46,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967800163] [2023-11-06 22:58:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:58:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:58:46,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:46,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967800163] [2023-11-06 22:58:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967800163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:46,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:46,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:58:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529547285] [2023-11-06 22:58:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:46,531 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:46,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:46,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:46,532 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:46,532 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:46,532 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,532 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:46,532 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:46,533 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2023-11-06 22:58:46,533 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:46,533 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:46,535 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,537 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,544 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,547 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,549 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,551 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,604 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:46,604 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:46,623 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:46,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-06 22:58:46,654 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:46,654 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:46,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,663 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,667 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:46,667 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:46,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-06 22:58:46,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,702 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:46,702 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:46,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-06 22:58:46,804 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:46,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,813 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:46,813 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:46,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:46,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:46,813 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:46,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:46,814 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:46,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2023-11-06 22:58:46,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:46,814 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:46,815 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,819 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,826 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,829 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,831 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,834 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:46,867 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:46,868 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,869 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,874 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-06 22:58:46,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:46,887 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:46,887 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:46,887 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:46,887 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:46,888 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:46,888 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:46,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-06 22:58:46,903 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:46,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,917 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 [2023-11-06 22:58:46,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-06 22:58:46,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:46,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:46,930 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:46,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:46,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:46,932 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:46,932 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:46,953 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:46,956 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-06 22:58:46,956 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-06 22:58:46,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,959 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,962 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:46,962 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:46,962 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:46,962 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-06 22:58:46,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-06 22:58:46,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:46,971 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:47,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:58:47,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:47,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2023-11-06 22:58:47,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:47,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:47,167 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 [2023-11-06 22:58:47,167 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47 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) [2023-11-06 22:58:47,288 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47. 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 135 states and 194 transitions. Complement of second has 14 states. [2023-11-06 22:58:47,288 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 [2023-11-06 22:58:47,290 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) [2023-11-06 22:58:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2023-11-06 22:58:47,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 3 letters. [2023-11-06 22:58:47,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:47,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 17 letters. Loop has 3 letters. [2023-11-06 22:58:47,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:47,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 6 letters. [2023-11-06 22:58:47,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:47,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 194 transitions. [2023-11-06 22:58:47,296 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:47,302 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 123 states and 182 transitions. [2023-11-06 22:58:47,302 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2023-11-06 22:58:47,303 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2023-11-06 22:58:47,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 182 transitions. [2023-11-06 22:58:47,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:47,303 INFO L218 hiAutomatonCegarLoop]: Abstraction has 123 states and 182 transitions. [2023-11-06 22:58:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states and 182 transitions. [2023-11-06 22:58:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2023-11-06 22:58:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 74 states have internal predecessors, (80), 33 states have call successors, (33), 19 states have call predecessors, (33), 16 states have return successors, (53), 20 states have call predecessors, (53), 28 states have call successors, (53) [2023-11-06 22:58:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2023-11-06 22:58:47,318 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 166 transitions. [2023-11-06 22:58:47,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:47,322 INFO L87 Difference]: Start difference. First operand 114 states and 166 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) [2023-11-06 22:58:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:47,370 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2023-11-06 22:58:47,370 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 176 transitions. [2023-11-06 22:58:47,374 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-11-06 22:58:47,378 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 122 states and 174 transitions. [2023-11-06 22:58:47,378 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2023-11-06 22:58:47,379 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2023-11-06 22:58:47,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 174 transitions. [2023-11-06 22:58:47,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:47,379 INFO L218 hiAutomatonCegarLoop]: Abstraction has 122 states and 174 transitions. [2023-11-06 22:58:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 174 transitions. [2023-11-06 22:58:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2023-11-06 22:58:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 64 states have internal predecessors, (68), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (45), 20 states have call predecessors, (45), 26 states have call successors, (45) [2023-11-06 22:58:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2023-11-06 22:58:47,392 INFO L240 hiAutomatonCegarLoop]: Abstraction has 102 states and 144 transitions. [2023-11-06 22:58:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:47,393 INFO L428 stractBuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2023-11-06 22:58:47,394 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-06 22:58:47,394 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 144 transitions. [2023-11-06 22:58:47,395 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-06 22:58:47,395 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:47,396 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:47,396 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,397 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,397 INFO L748 eck$LassoCheckResult]: Stem: 1194#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1177#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1142#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1173#$Ultimate##0 ~j := #in~j; 1206#L18 assume !(~j <= 0); 1160#L20 call #t~ret3 := rec1(~j - 1);< 1205#$Ultimate##0 ~i := #in~i; 1204#L12 assume !(~i <= 0); 1183#L14 call #t~ret0 := rec1(~i - 2);< 1202#$Ultimate##0 ~i := #in~i; 1200#L12 assume !(~i <= 0); 1196#L14 call #t~ret0 := rec1(~i - 2);< 1199#$Ultimate##0 ~i := #in~i; 1201#L12 assume ~i <= 0;#res := 0; 1239#rec1FINAL assume true; 1240#rec1EXIT >#28#return; 1149#L14-1 [2023-11-06 22:58:47,397 INFO L750 eck$LassoCheckResult]: Loop: 1149#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1147#$Ultimate##0 ~i := #in~i; 1150#L12 assume ~i <= 0;#res := 0; 1178#rec1FINAL assume true; 1179#rec1EXIT >#30#return; 1187#L14-2 call #t~ret2 := rec1(#t~ret1);< 1175#$Ultimate##0 ~i := #in~i; 1237#L12 assume !(~i <= 0); 1186#L14 call #t~ret0 := rec1(~i - 2);< 1175#$Ultimate##0 ~i := #in~i; 1237#L12 assume ~i <= 0;#res := 0; 1236#rec1FINAL assume true; 1235#rec1EXIT >#28#return; 1149#L14-1 [2023-11-06 22:58:47,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2023-11-06 22:58:47,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681602716] [2023-11-06 22:58:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,412 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:47,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2023-11-06 22:58:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439359719] [2023-11-06 22:58:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-06 22:58:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:58:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:58:47,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:47,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439359719] [2023-11-06 22:58:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439359719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:47,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794269558] [2023-11-06 22:58:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:47,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:47,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:47,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:58:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:58:47,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:47,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794269558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:47,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:47,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-06 22:58:47,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092200911] [2023-11-06 22:58:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:47,569 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-06 22:58:47,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:47,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:47,570 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. cyclomatic complexity: 49 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) [2023-11-06 22:58:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:47,620 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2023-11-06 22:58:47,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 118 states and 162 transitions. [2023-11-06 22:58:47,624 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:47,632 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 118 states to 118 states and 162 transitions. [2023-11-06 22:58:47,632 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2023-11-06 22:58:47,633 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2023-11-06 22:58:47,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 162 transitions. [2023-11-06 22:58:47,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:47,633 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 162 transitions. [2023-11-06 22:58:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 162 transitions. [2023-11-06 22:58:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2023-11-06 22:58:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 19 states have call predecessors, (35), 16 states have return successors, (49), 24 states have call predecessors, (49), 30 states have call successors, (49) [2023-11-06 22:58:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2023-11-06 22:58:47,657 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 158 transitions. [2023-11-06 22:58:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:47,664 INFO L428 stractBuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2023-11-06 22:58:47,664 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-06 22:58:47,664 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 158 transitions. [2023-11-06 22:58:47,667 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-11-06 22:58:47,667 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:47,667 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:47,671 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,671 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,672 INFO L748 eck$LassoCheckResult]: Stem: 1480#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1467#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; 1420#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1444#$Ultimate##0 ~j := #in~j; 1490#L18 assume !(~j <= 0); 1437#L20 call #t~ret3 := rec1(~j - 1);< 1489#$Ultimate##0 ~i := #in~i; 1488#L12 assume !(~i <= 0); 1451#L14 call #t~ret0 := rec1(~i - 2);< 1485#$Ultimate##0 ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1532#rec1FINAL assume true; 1528#rec1EXIT >#28#return; 1513#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1455#$Ultimate##0 ~i := #in~i; 1517#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1512#rec1EXIT >#30#return; 1427#L14-2 call #t~ret2 := rec1(#t~ret1);< 1426#$Ultimate##0 ~i := #in~i; 1429#L12 assume ~i <= 0;#res := 0; 1468#rec1FINAL assume true; 1469#rec1EXIT >#32#return; 1436#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1439#rec1FINAL assume true; 1482#rec1EXIT >#34#return; 1419#L20-1 [2023-11-06 22:58:47,672 INFO L750 eck$LassoCheckResult]: Loop: 1419#L20-1 call #t~ret4 := rec2(#t~ret3);< 1423#$Ultimate##0 ~j := #in~j; 1434#L18 assume !(~j <= 0); 1453#L20 call #t~ret3 := rec1(~j - 1);< 1477#$Ultimate##0 ~i := #in~i; 1518#L12 assume !(~i <= 0); 1448#L14 call #t~ret0 := rec1(~i - 2);< 1477#$Ultimate##0 ~i := #in~i; 1518#L12 assume ~i <= 0;#res := 0; 1516#rec1FINAL assume true; 1514#rec1EXIT >#28#return; 1445#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1455#$Ultimate##0 ~i := #in~i; 1517#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1512#rec1EXIT >#30#return; 1428#L14-2 call #t~ret2 := rec1(#t~ret1);< 1426#$Ultimate##0 ~i := #in~i; 1429#L12 assume ~i <= 0;#res := 0; 1468#rec1FINAL assume true; 1469#rec1EXIT >#32#return; 1472#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1494#rec1FINAL assume true; 1481#rec1EXIT >#34#return; 1419#L20-1 [2023-11-06 22:58:47,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1231361643, now seen corresponding path program 1 times [2023-11-06 22:58:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838013819] [2023-11-06 22:58:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:47,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1591101301, now seen corresponding path program 1 times [2023-11-06 22:58:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717275842] [2023-11-06 22:58:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,732 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:47,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:47,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash 774680821, now seen corresponding path program 1 times [2023-11-06 22:58:47,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965798220] [2023-11-06 22:58:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-06 22:58:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:58:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 22:58:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:58:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-06 22:58:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:58:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 22:58:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:58:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-06 22:58:48,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:48,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965798220] [2023-11-06 22:58:48,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965798220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:48,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297136026] [2023-11-06 22:58:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:48,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:48,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:48,122 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:58:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:58:48,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-06 22:58:48,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-06 22:58:48,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297136026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:48,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:48,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2023-11-06 22:58:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382506697] [2023-11-06 22:58:48,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:48,799 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:48,799 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:48,799 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:48,800 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:48,800 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:48,800 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:48,800 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:48,800 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:48,800 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2023-11-06 22:58:48,800 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:48,800 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:48,801 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:48,815 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:48,818 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:48,856 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:48,856 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:48,865 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:48,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:48,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-06 22:58:48,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:48,935 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,943 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:48,943 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:48,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-06 22:58:51,043 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:51,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2023-11-06 22:58:51,047 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:51,047 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:51,047 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:51,047 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:51,047 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:51,047 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:51,047 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:51,047 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:51,047 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2023-11-06 22:58:51,047 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:51,047 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:51,049 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:51,065 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:51,067 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:51,110 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:51,110 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:51,111 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:51,122 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 [2023-11-06 22:58:51,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:51,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:51,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:51,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:51,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:51,138 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:51,138 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-06 22:58:51,165 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:51,169 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-06 22:58:51,170 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-06 22:58:51,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:51,171 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:51,175 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:51,176 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:51,176 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:51,176 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2023-11-06 22:58:51,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-06 22:58:51,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:51,185 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:51,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:51,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:51,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:51,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:58:51,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:58:51,726 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-06 22:58:51,726 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:52,158 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Result 585 states and 904 transitions. Complement of second has 45 states. [2023-11-06 22:58:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2023-11-06 22:58:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 53 transitions. [2023-11-06 22:58:52,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 24 letters. [2023-11-06 22:58:52,161 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:52,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 50 letters. Loop has 24 letters. [2023-11-06 22:58:52,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:52,162 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 48 letters. [2023-11-06 22:58:52,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:52,163 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 904 transitions. [2023-11-06 22:58:52,176 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2023-11-06 22:58:52,186 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 433 states and 650 transitions. [2023-11-06 22:58:52,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2023-11-06 22:58:52,187 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2023-11-06 22:58:52,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 433 states and 650 transitions. [2023-11-06 22:58:52,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:52,187 INFO L218 hiAutomatonCegarLoop]: Abstraction has 433 states and 650 transitions. [2023-11-06 22:58:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states and 650 transitions. [2023-11-06 22:58:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 384. [2023-11-06 22:58:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 226 states have internal predecessors, (232), 125 states have call successors, (129), 57 states have call predecessors, (129), 56 states have return successors, (174), 100 states have call predecessors, (174), 116 states have call successors, (174) [2023-11-06 22:58:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 535 transitions. [2023-11-06 22:58:52,218 INFO L240 hiAutomatonCegarLoop]: Abstraction has 384 states and 535 transitions. [2023-11-06 22:58:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:58:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:58:52,220 INFO L87 Difference]: Start difference. First operand 384 states and 535 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-06 22:58:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:52,445 INFO L93 Difference]: Finished difference Result 443 states and 646 transitions. [2023-11-06 22:58:52,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 443 states and 646 transitions. [2023-11-06 22:58:52,454 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2023-11-06 22:58:52,462 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 443 states to 350 states and 496 transitions. [2023-11-06 22:58:52,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2023-11-06 22:58:52,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2023-11-06 22:58:52,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 350 states and 496 transitions. [2023-11-06 22:58:52,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:52,463 INFO L218 hiAutomatonCegarLoop]: Abstraction has 350 states and 496 transitions. [2023-11-06 22:58:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states and 496 transitions. [2023-11-06 22:58:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 315. [2023-11-06 22:58:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 183 states have internal predecessors, (186), 100 states have call successors, (102), 49 states have call predecessors, (102), 46 states have return successors, (128), 82 states have call predecessors, (128), 84 states have call successors, (128) [2023-11-06 22:58:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2023-11-06 22:58:52,481 INFO L240 hiAutomatonCegarLoop]: Abstraction has 315 states and 416 transitions. [2023-11-06 22:58:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:58:52,482 INFO L428 stractBuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2023-11-06 22:58:52,482 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-06 22:58:52,482 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 315 states and 416 transitions. [2023-11-06 22:58:52,485 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2023-11-06 22:58:52,485 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:52,485 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:52,487 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:52,487 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:58:52,487 INFO L748 eck$LassoCheckResult]: Stem: 3626#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 3602#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 3561#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 3590#$Ultimate##0 ~j := #in~j; 3646#L18 assume !(~j <= 0); 3577#L20 call #t~ret3 := rec1(~j - 1);< 3644#$Ultimate##0 ~i := #in~i; 3653#L12 assume !(~i <= 0); 3596#L14 call #t~ret0 := rec1(~i - 2);< 3652#$Ultimate##0 ~i := #in~i; 3657#L12 assume ~i <= 0;#res := 0; 3764#rec1FINAL assume true; 3762#rec1EXIT >#28#return; 3749#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3599#$Ultimate##0 ~i := #in~i; 3753#L12 assume ~i <= 0;#res := 0; 3752#rec1FINAL assume true; 3748#rec1EXIT >#30#return; 3566#L14-2 call #t~ret2 := rec1(#t~ret1);< 3565#$Ultimate##0 ~i := #in~i; 3568#L12 assume ~i <= 0;#res := 0; 3763#rec1FINAL assume true; 3761#rec1EXIT >#32#return; 3576#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3578#rec1FINAL assume true; 3627#rec1EXIT >#34#return; 3558#L20-1 call #t~ret4 := rec2(#t~ret3);< 3560#$Ultimate##0 ~j := #in~j; 3573#L18 assume !(~j <= 0); 3618#L20 call #t~ret3 := rec1(~j - 1);< 3630#$Ultimate##0 ~i := #in~i; 3740#L12 assume !(~i <= 0); 3617#L14 call #t~ret0 := rec1(~i - 2);< 3620#$Ultimate##0 [2023-11-06 22:58:52,487 INFO L750 eck$LassoCheckResult]: Loop: 3620#$Ultimate##0 ~i := #in~i; 3713#L12 assume !(~i <= 0); 3700#L14 call #t~ret0 := rec1(~i - 2);< 3620#$Ultimate##0 [2023-11-06 22:58:52,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1565705522, now seen corresponding path program 2 times [2023-11-06 22:58:52,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:52,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752262590] [2023-11-06 22:58:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:52,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-06 22:58:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:58:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 22:58:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:58:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:58:52,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:52,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752262590] [2023-11-06 22:58:52,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752262590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:52,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712710131] [2023-11-06 22:58:52,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:52,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:52,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:52,634 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:52,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:58:52,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:52,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:58:52,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:58:52,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:58:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712710131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:52,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2023-11-06 22:58:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505298221] [2023-11-06 22:58:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:52,852 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-06 22:58:52,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2023-11-06 22:58:52,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639223365] [2023-11-06 22:58:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:52,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:52,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:52,886 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:52,886 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:52,886 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:52,886 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:52,886 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:52,886 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:52,887 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:52,887 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:52,887 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2023-11-06 22:58:52,887 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:52,887 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:52,888 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,890 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,892 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,897 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,899 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,901 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:52,925 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:52,926 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:52,927 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:52,936 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:52,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:52,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-06 22:58:52,969 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:52,970 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:52,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:52,979 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:52,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:52,986 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:52,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-06 22:58:53,017 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:53,018 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:53,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,027 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-06 22:58:53,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:53,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:53,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,064 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:53,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:53,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-06 22:58:53,101 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:53,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,105 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:53,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:53,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:53,106 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:53,106 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:53,106 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,106 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:53,106 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:53,106 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2023-11-06 22:58:53,106 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:53,106 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:53,107 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,109 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,112 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,114 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,120 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,122 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:53,154 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:53,154 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:53,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,155 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-06 22:58:53,163 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 [2023-11-06 22:58:53,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:53,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:53,176 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:53,176 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:53,176 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:53,177 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:53,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:53,201 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:53,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,211 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,214 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 [2023-11-06 22:58:53,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-06 22:58:53,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:53,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:53,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:53,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:53,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:53,227 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:53,227 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:53,249 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:53,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,259 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,268 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 [2023-11-06 22:58:53,280 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:53,280 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:53,280 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:53,280 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:53,280 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:53,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:53,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:53,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-06 22:58:53,290 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:53,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,295 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,298 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 [2023-11-06 22:58:53,310 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:53,311 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:53,311 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:53,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:53,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:53,312 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:53,312 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:53,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-06 22:58:53,321 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:53,338 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-06 22:58:53,338 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-06 22:58:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:53,345 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-06 22:58:53,348 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:53,348 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:53,348 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:53,348 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-06 22:58:53,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,352 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:53,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:53,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:58:53,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:53,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:53,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:53,690 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 [2023-11-06 22:58:53,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:53,780 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2023-11-06 22:58:53,780 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 [2023-11-06 22:58:53,783 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2023-11-06 22:58:53,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2023-11-06 22:58:53,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:53,784 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-06 22:58:53,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:53,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:58:53,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:54,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:54,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:54,132 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 [2023-11-06 22:58:54,132 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:54,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:54,232 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2023-11-06 22:58:54,233 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 [2023-11-06 22:58:54,234 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2023-11-06 22:58:54,235 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2023-11-06 22:58:54,235 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:54,235 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-06 22:58:54,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:54,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:58:54,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:54,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:54,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:54,579 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 [2023-11-06 22:58:54,579 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:54,677 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 486 states and 617 transitions. Complement of second has 16 states. [2023-11-06 22:58:54,678 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 [2023-11-06 22:58:54,679 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:58:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2023-11-06 22:58:54,679 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2023-11-06 22:58:54,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:54,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 36 letters. Loop has 3 letters. [2023-11-06 22:58:54,683 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:54,684 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 6 letters. [2023-11-06 22:58:54,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:54,684 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 486 states and 617 transitions. [2023-11-06 22:58:54,693 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2023-11-06 22:58:54,701 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 486 states to 396 states and 527 transitions. [2023-11-06 22:58:54,701 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2023-11-06 22:58:54,702 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2023-11-06 22:58:54,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 527 transitions. [2023-11-06 22:58:54,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:54,702 INFO L218 hiAutomatonCegarLoop]: Abstraction has 396 states and 527 transitions. [2023-11-06 22:58:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states and 527 transitions. [2023-11-06 22:58:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2023-11-06 22:58:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 196 states have (on average 1.1275510204081634) internal successors, (221), 212 states have internal predecessors, (221), 102 states have call successors, (104), 57 states have call predecessors, (104), 54 states have return successors, (132), 82 states have call predecessors, (132), 86 states have call successors, (132) [2023-11-06 22:58:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2023-11-06 22:58:54,721 INFO L240 hiAutomatonCegarLoop]: Abstraction has 352 states and 457 transitions. [2023-11-06 22:58:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:58:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:58:54,723 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:58:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:54,813 INFO L93 Difference]: Finished difference Result 379 states and 514 transitions. [2023-11-06 22:58:54,814 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 514 transitions. [2023-11-06 22:58:54,820 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2023-11-06 22:58:54,822 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 105 states and 143 transitions. [2023-11-06 22:58:54,823 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2023-11-06 22:58:54,823 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 99 [2023-11-06 22:58:54,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2023-11-06 22:58:54,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:54,824 INFO L218 hiAutomatonCegarLoop]: Abstraction has 105 states and 143 transitions. [2023-11-06 22:58:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2023-11-06 22:58:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2023-11-06 22:58:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2023-11-06 22:58:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2023-11-06 22:58:54,829 INFO L240 hiAutomatonCegarLoop]: Abstraction has 87 states and 107 transitions. [2023-11-06 22:58:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:58:54,830 INFO L428 stractBuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2023-11-06 22:58:54,830 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-06 22:58:54,830 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 107 transitions. [2023-11-06 22:58:54,831 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2023-11-06 22:58:54,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:54,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:54,832 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:54,832 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:58:54,833 INFO L748 eck$LassoCheckResult]: Stem: 6465#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 6454#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 6434#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6451#$Ultimate##0 ~j := #in~j; 6493#L18 assume !(~j <= 0); 6467#L20 call #t~ret3 := rec1(~j - 1);< 6492#$Ultimate##0 ~i := #in~i; 6491#L12 assume !(~i <= 0); 6462#L14 call #t~ret0 := rec1(~i - 2);< 6468#$Ultimate##0 ~i := #in~i; 6459#L12 assume !(~i <= 0); 6460#L14 [2023-11-06 22:58:54,833 INFO L750 eck$LassoCheckResult]: Loop: 6460#L14 call #t~ret0 := rec1(~i - 2);< 6499#$Ultimate##0 ~i := #in~i; 6459#L12 assume !(~i <= 0); 6460#L14 [2023-11-06 22:58:54,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1203085824, now seen corresponding path program 3 times [2023-11-06 22:58:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:54,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685471054] [2023-11-06 22:58:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:54,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,837 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:54,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,841 INFO L85 PathProgramCache]: Analyzing trace with hash 55742, now seen corresponding path program 4 times [2023-11-06 22:58:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:54,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843167142] [2023-11-06 22:58:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:54,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:54,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash 372328287, now seen corresponding path program 4 times [2023-11-06 22:58:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:54,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683557675] [2023-11-06 22:58:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:54,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:54,896 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:54,896 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:54,896 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:54,896 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:54,896 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:54,896 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:54,896 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:54,897 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:54,897 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2023-11-06 22:58:54,897 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:54,897 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:54,898 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:54,900 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:54,902 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:54,908 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:54,910 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:54,944 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:54,944 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:54,945 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:54,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:54,954 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:54,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-06 22:58:54,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:54,982 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:54,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:54,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:54,986 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:54,995 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:54,995 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:55,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-06 22:58:55,014 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:55,014 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:55,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:55,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:55,019 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:55,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:55,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-06 22:58:55,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:55,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:55,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:55,062 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:55,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:55,069 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:55,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2023-11-06 22:58:57,069 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:57,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:57,073 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:57,073 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:57,073 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:57,073 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:57,073 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:57,073 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:57,073 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:57,073 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:57,073 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2023-11-06 22:58:57,073 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:57,073 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:57,074 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,089 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,094 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,097 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,133 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:57,133 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:57,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:57,134 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,142 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 [2023-11-06 22:58:57,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:57,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:57,155 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:57,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:57,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:57,156 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:57,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:57,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2023-11-06 22:58:57,169 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:57,174 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-06 22:58:57,174 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-06 22:58:57,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:57,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:57,176 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,182 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:57,182 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:57,182 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:57,182 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2023-11-06 22:58:57,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2023-11-06 22:58:57,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:57,187 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:57,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:57,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:57,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:57,267 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 [2023-11-06 22:58:57,267 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23 Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-06 22:58:57,302 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 101 states and 125 transitions. Complement of second has 11 states. [2023-11-06 22:58:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-06 22:58:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-06 22:58:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2023-11-06 22:58:57,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 3 letters. [2023-11-06 22:58:57,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:57,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 14 letters. Loop has 3 letters. [2023-11-06 22:58:57,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:57,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 6 letters. [2023-11-06 22:58:57,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:57,305 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 125 transitions. [2023-11-06 22:58:57,307 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2023-11-06 22:58:57,309 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 95 states and 118 transitions. [2023-11-06 22:58:57,309 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2023-11-06 22:58:57,309 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2023-11-06 22:58:57,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 118 transitions. [2023-11-06 22:58:57,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:58:57,310 INFO L218 hiAutomatonCegarLoop]: Abstraction has 95 states and 118 transitions. [2023-11-06 22:58:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 118 transitions. [2023-11-06 22:58:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-06 22:58:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 59 states have internal predecessors, (61), 23 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (30), 17 states have call predecessors, (30), 21 states have call successors, (30) [2023-11-06 22:58:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2023-11-06 22:58:57,314 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 115 transitions. [2023-11-06 22:58:57,314 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2023-11-06 22:58:57,314 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-06 22:58:57,315 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 115 transitions. [2023-11-06 22:58:57,316 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2023-11-06 22:58:57,316 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:58:57,316 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:58:57,318 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:57,318 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-06 22:58:57,318 INFO L748 eck$LassoCheckResult]: Stem: 6732#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 6717#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; 6693#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6702#$Ultimate##0 ~j := #in~j; 6703#L18 assume !(~j <= 0); 6730#L20 call #t~ret3 := rec1(~j - 1);< 6731#$Ultimate##0 ~i := #in~i; 6754#L12 assume !(~i <= 0); 6710#L14 call #t~ret0 := rec1(~i - 2);< 6751#$Ultimate##0 ~i := #in~i; 6756#L12 assume !(~i <= 0); 6696#L14 call #t~ret0 := rec1(~i - 2);< 6695#$Ultimate##0 ~i := #in~i; 6697#L12 assume ~i <= 0;#res := 0; 6784#rec1FINAL assume true; 6782#rec1EXIT >#28#return; 6715#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6716#$Ultimate##0 ~i := #in~i; 6752#L12 assume ~i <= 0;#res := 0; 6749#rec1FINAL assume true; 6746#rec1EXIT >#30#return; 6713#L14-2 call #t~ret2 := rec1(#t~ret1);< 6714#$Ultimate##0 ~i := #in~i; 6755#L12 assume ~i <= 0;#res := 0; 6747#rec1FINAL assume true; 6744#rec1EXIT >#32#return; 6704#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6712#rec1FINAL assume true; 6738#rec1EXIT >#28#return; 6705#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6740#$Ultimate##0 [2023-11-06 22:58:57,319 INFO L750 eck$LassoCheckResult]: Loop: 6740#$Ultimate##0 ~i := #in~i; 6750#L12 assume !(~i <= 0); 6709#L14 call #t~ret0 := rec1(~i - 2);< 6759#$Ultimate##0 ~i := #in~i; 6761#L12 assume !(~i <= 0); 6711#L14 call #t~ret0 := rec1(~i - 2);< 6760#$Ultimate##0 ~i := #in~i; 6722#L12 assume ~i <= 0;#res := 0; 6718#rec1FINAL assume true; 6719#rec1EXIT >#28#return; 6715#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6716#$Ultimate##0 ~i := #in~i; 6752#L12 assume ~i <= 0;#res := 0; 6749#rec1FINAL assume true; 6746#rec1EXIT >#30#return; 6713#L14-2 call #t~ret2 := rec1(#t~ret1);< 6714#$Ultimate##0 ~i := #in~i; 6755#L12 assume ~i <= 0;#res := 0; 6747#rec1FINAL assume true; 6744#rec1EXIT >#32#return; 6704#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6712#rec1FINAL assume true; 6738#rec1EXIT >#28#return; 6706#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6740#$Ultimate##0 [2023-11-06 22:58:57,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2023-11-06 22:58:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853326531] [2023-11-06 22:58:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:57,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:57,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:57,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 245881341, now seen corresponding path program 1 times [2023-11-06 22:58:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:57,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299570355] [2023-11-06 22:58:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:57,342 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:58:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:58:57,355 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:58:57,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2071488077, now seen corresponding path program 2 times [2023-11-06 22:58:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:57,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297619080] [2023-11-06 22:58:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:58:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:58:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 22:58:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:58:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 22:58:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:58:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 22:58:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:58:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-06 22:58:57,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:57,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297619080] [2023-11-06 22:58:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297619080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844628452] [2023-11-06 22:58:57,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:57,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:57,509 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-06 22:58:57,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:57,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:57,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:57,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 22:58:57,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-06 22:58:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844628452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:57,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:57,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-06 22:58:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458395869] [2023-11-06 22:58:57,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:57,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:57,988 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:57,988 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:57,988 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:57,988 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:57,988 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-06 22:58:57,988 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:57,989 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:57,989 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:57,989 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2023-11-06 22:58:57,989 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:57,989 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:57,990 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:57,993 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,002 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,004 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,006 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,008 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,051 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:58,051 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-06 22:58:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,053 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2023-11-06 22:58:58,061 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,073 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:58,073 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,076 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2023-11-06 22:58:58,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,079 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,110 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:58,110 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:58,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,116 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-06 22:58:58,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,119 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,134 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:58,134 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:58,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,138 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-06 22:58:58,170 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:58,170 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:58,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,176 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-06 22:58:58,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,207 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-06 22:58:58,207 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-06 22:58:58,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,212 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,218 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-06 22:58:58,218 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-06 22:58:58,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2023-11-06 22:58:58,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,234 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-06 22:58:58,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-06 22:58:58,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-06 22:58:58,260 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-06 22:58:58,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,265 INFO L210 LassoAnalysis]: Preferences: [2023-11-06 22:58:58,265 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-06 22:58:58,265 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-06 22:58:58,265 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-06 22:58:58,265 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-06 22:58:58,265 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,265 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-06 22:58:58,266 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-06 22:58:58,266 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2023-11-06 22:58:58,266 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-06 22:58:58,266 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-06 22:58:58,266 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,269 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,271 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,273 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,275 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,278 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-06 22:58:58,312 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-06 22:58:58,312 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-06 22:58:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,314 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,322 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 [2023-11-06 22:58:58,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-06 22:58:58,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,335 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,335 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,349 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:58,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,354 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,358 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 [2023-11-06 22:58:58,370 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,370 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,371 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,371 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2023-11-06 22:58:58,393 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:58,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,398 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,402 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 [2023-11-06 22:58:58,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,414 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,414 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,414 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,414 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,415 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,415 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2023-11-06 22:58:58,429 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:58,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,434 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,438 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 [2023-11-06 22:58:58,450 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,450 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,450 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,450 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,451 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2023-11-06 22:58:58,473 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:58,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,478 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,482 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 [2023-11-06 22:58:58,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,494 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,494 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,494 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,494 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-06 22:58:58,508 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-06 22:58:58,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,513 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,518 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 [2023-11-06 22:58:58,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-06 22:58:58,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-06 22:58:58,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-06 22:58:58,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-06 22:58:58,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-06 22:58:58,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-06 22:58:58,531 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-06 22:58:58,531 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-06 22:58:58,533 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-06 22:58:58,535 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-06 22:58:58,535 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-06 22:58:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:58:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:58,536 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-06 22:58:58,539 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-06 22:58:58,539 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-06 22:58:58,539 INFO L513 LassoAnalysis]: Proved termination. [2023-11-06 22:58:58,539 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-11-06 22:58:58,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Ended with exit code 0 [2023-11-06 22:58:58,542 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-06 22:58:58,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:58,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:58:58,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:58,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:58:58,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:58:59,052 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-06 22:58:59,052 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:59,123 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2023-11-06 22:58:59,124 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 [2023-11-06 22:58:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-11-06 22:58:59,125 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2023-11-06 22:58:59,125 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:59,125 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-06 22:58:59,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:59,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:58:59,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:59,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:58:59,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:58:59,635 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-06 22:58:59,635 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:59,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:59,714 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2023-11-06 22:58:59,715 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 [2023-11-06 22:58:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:58:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-11-06 22:58:59,715 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2023-11-06 22:58:59,716 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:58:59,716 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-06 22:58:59,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:59,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:58:59,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:00,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:59:00,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:59:00,217 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 9 loop predicates [2023-11-06 22:59:00,218 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:59:00,533 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 258 states and 304 transitions. Complement of second has 31 states. [2023-11-06 22:59:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2023-11-06 22:59:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:59:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 39 transitions. [2023-11-06 22:59:00,534 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 39 transitions. Stem has 30 letters. Loop has 24 letters. [2023-11-06 22:59:00,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:59:00,535 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-06 22:59:00,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:00,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:59:00,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:00,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:59:00,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:59:01,006 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-06 22:59:01,006 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:59:01,547 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 410 states and 516 transitions. Complement of second has 80 states. [2023-11-06 22:59:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2023-11-06 22:59:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:59:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 50 transitions. [2023-11-06 22:59:01,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 24 letters. [2023-11-06 22:59:01,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:59:01,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 54 letters. Loop has 24 letters. [2023-11-06 22:59:01,552 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:59:01,552 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 48 letters. [2023-11-06 22:59:01,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-06 22:59:01,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 410 states and 516 transitions. [2023-11-06 22:59:01,560 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-06 22:59:01,565 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 410 states to 254 states and 346 transitions. [2023-11-06 22:59:01,565 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2023-11-06 22:59:01,565 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2023-11-06 22:59:01,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 346 transitions. [2023-11-06 22:59:01,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-06 22:59:01,566 INFO L218 hiAutomatonCegarLoop]: Abstraction has 254 states and 346 transitions. [2023-11-06 22:59:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 346 transitions. [2023-11-06 22:59:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2023-11-06 22:59:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 127 states have (on average 1.125984251968504) internal successors, (143), 139 states have internal predecessors, (143), 51 states have call successors, (52), 34 states have call predecessors, (52), 39 states have return successors, (76), 43 states have call predecessors, (76), 49 states have call successors, (76) [2023-11-06 22:59:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2023-11-06 22:59:01,577 INFO L240 hiAutomatonCegarLoop]: Abstraction has 217 states and 271 transitions. [2023-11-06 22:59:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:59:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:59:01,578 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-06 22:59:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:01,622 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-11-06 22:59:01,622 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 38 transitions. [2023-11-06 22:59:01,623 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-06 22:59:01,623 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2023-11-06 22:59:01,623 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-06 22:59:01,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-06 22:59:01,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-06 22:59:01,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:01,624 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:59:01,624 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:59:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:59:01,625 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:59:01,625 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-06 22:59:01,625 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-06 22:59:01,625 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-06 22:59:01,625 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-06 22:59:01,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.11 10:59:01 BoogieIcfgContainer [2023-11-06 22:59:01,633 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-06 22:59:01,633 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:59:01,633 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:59:01,634 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:59:01,634 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43" (3/4) ... [2023-11-06 22:59:01,636 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-06 22:59:01,637 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:59:01,638 INFO L158 Benchmark]: Toolchain (without parser) took 19001.86ms. Allocated memory was 172.0MB in the beginning and 251.7MB in the end (delta: 79.7MB). Free memory was 125.0MB in the beginning and 201.8MB in the end (delta: -76.8MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2023-11-06 22:59:01,638 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory was 64.6MB in the beginning and 64.2MB in the end (delta: 321.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:59:01,638 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.16ms. Allocated memory is still 172.0MB. Free memory was 125.0MB in the beginning and 115.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 22:59:01,639 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.51ms. Allocated memory is still 172.0MB. Free memory was 115.9MB in the beginning and 114.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:59:01,639 INFO L158 Benchmark]: Boogie Preprocessor took 18.98ms. Allocated memory is still 172.0MB. Free memory was 114.5MB in the beginning and 113.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:59:01,639 INFO L158 Benchmark]: RCFGBuilder took 265.28ms. Allocated memory is still 172.0MB. Free memory was 113.2MB in the beginning and 103.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:59:01,640 INFO L158 Benchmark]: BuchiAutomizer took 18495.34ms. Allocated memory was 172.0MB in the beginning and 251.7MB in the end (delta: 79.7MB). Free memory was 103.3MB in the beginning and 201.8MB in the end (delta: -98.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:59:01,640 INFO L158 Benchmark]: Witness Printer took 3.96ms. Allocated memory is still 251.7MB. Free memory is still 201.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:59:01,642 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 113.2MB. Free memory was 64.6MB in the beginning and 64.2MB in the end (delta: 321.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.16ms. Allocated memory is still 172.0MB. Free memory was 125.0MB in the beginning and 115.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.51ms. Allocated memory is still 172.0MB. Free memory was 115.9MB in the beginning and 114.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.98ms. Allocated memory is still 172.0MB. Free memory was 114.5MB in the beginning and 113.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 265.28ms. Allocated memory is still 172.0MB. Free memory was 113.2MB in the beginning and 103.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 18495.34ms. Allocated memory was 172.0MB in the beginning and 251.7MB in the end (delta: 79.7MB). Free memory was 103.3MB in the beginning and 201.8MB in the end (delta: -98.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.96ms. Allocated memory is still 251.7MB. Free memory is still 201.8MB. 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 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 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 deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@10d37311 and consists of 11 locations. One deterministic module has affine ranking function 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 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 18.4s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 10.8s. Construction of modules took 1.0s. Büchi inclusion checks took 6.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 381 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 354 mSDsluCounter, 851 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 549 mSDsCounter, 304 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 989 IncrementalHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 304 mSolverCounterUnsat, 302 mSDtfsCounter, 989 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq163 hnf92 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 46ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.3s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-06 22:59:01,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:01,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-06 22:59:02,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:02,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:02,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eace5de7-d684-4862-9701-6b66bd3cbc2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE