./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8393723b 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_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro --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 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:11:13,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:11:13,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:11:13,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:11:13,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:11:13,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:11:13,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:11:13,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:11:13,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:11:13,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:11:13,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:11:13,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:11:13,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:11:13,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:11:13,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:11:13,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:11:13,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:11:13,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:11:13,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:11:13,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:11:13,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:11:13,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:11:13,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:11:13,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:11:13,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:11:13,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:11:13,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:11:13,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:11:13,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:11:13,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:11:13,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:11:13,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:11:13,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:11:13,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:11:13,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:11:13,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:11:13,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:11:13,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:11:13,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:11:13,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:11:13,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:11:13,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-18 20:11:13,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:11:13,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:11:13,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:11:13,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:11:13,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:11:13,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:11:13,678 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:11:13,679 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-18 20:11:13,679 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-18 20:11:13,679 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-18 20:11:13,680 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-18 20:11:13,680 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-18 20:11:13,680 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-18 20:11:13,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:11:13,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:11:13,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:11:13,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:11:13,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-18 20:11:13,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-18 20:11:13,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-18 20:11:13,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:11:13,682 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-18 20:11:13,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:11:13,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-18 20:11:13,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:11:13,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:11:13,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:11:13,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:11:13,685 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-18 20:11:13,685 INFO L138 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_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2022-11-18 20:11:13,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:11:13,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:11:13,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:11:13,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:11:13,981 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:11:13,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2022-11-18 20:11:14,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/data/7d137cbd2/9bc3ccb33dc44545a13989bf407865bb/FLAGc3346e1bb [2022-11-18 20:11:14,468 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:11:14,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2022-11-18 20:11:14,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/data/7d137cbd2/9bc3ccb33dc44545a13989bf407865bb/FLAGc3346e1bb [2022-11-18 20:11:14,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/data/7d137cbd2/9bc3ccb33dc44545a13989bf407865bb [2022-11-18 20:11:14,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:11:14,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:11:14,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:14,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:11:14,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:11:14,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:14" (1/1) ... [2022-11-18 20:11:14,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2249e23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:14, skipping insertion in model container [2022-11-18 20:11:14,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:14" (1/1) ... [2022-11-18 20:11:14,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:11:14,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:11:15,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:15,049 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:11:15,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:15,075 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:11:15,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15 WrapperNode [2022-11-18 20:11:15,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:15,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:15,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:11:15,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:11:15,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,113 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-11-18 20:11:15,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:15,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:11:15,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:11:15,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:11:15,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:11:15,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:11:15,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:11:15,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:11:15,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (1/1) ... [2022-11-18 20:11:15,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:15,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:15,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-18 20:11:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-11-18 20:11:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-11-18 20:11:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-11-18 20:11:15,238 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-11-18 20:11:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:11:15,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:11:15,306 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:11:15,308 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:11:15,427 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:11:15,435 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:11:15,435 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 20:11:15,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:15 BoogieIcfgContainer [2022-11-18 20:11:15,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:11:15,438 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-18 20:11:15,438 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-18 20:11:15,442 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-18 20:11:15,443 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:11:15,443 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 08:11:14" (1/3) ... [2022-11-18 20:11:15,444 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b825809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:11:15, skipping insertion in model container [2022-11-18 20:11:15,445 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:11:15,445 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:15" (2/3) ... [2022-11-18 20:11:15,445 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b825809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:11:15, skipping insertion in model container [2022-11-18 20:11:15,445 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:11:15,446 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:15" (3/3) ... [2022-11-18 20:11:15,447 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2022-11-18 20:11:15,562 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-18 20:11:15,562 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-18 20:11:15,562 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-18 20:11:15,562 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-18 20:11:15,562 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-18 20:11:15,562 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-18 20:11:15,562 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-18 20:11:15,563 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-18 20:11:15,580 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) [2022-11-18 20:11:15,636 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:15,636 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:15,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:15,644 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-18 20:11:15,644 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:15,645 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-18 20:11:15,645 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) [2022-11-18 20:11:15,648 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:15,648 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:15,648 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:15,649 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-18 20:11:15,649 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:15,657 INFO L748 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 13#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;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 9#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 16#rec2ENTRYtrue [2022-11-18 20:11:15,658 INFO L750 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 16#rec2ENTRYtrue [2022-11-18 20:11:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2022-11-18 20:11:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392360004] [2022-11-18 20:11:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:15,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:15,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2022-11-18 20:11:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886215875] [2022-11-18 20:11:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:11:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886215875] [2022-11-18 20:11:16,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886215875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:16,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:16,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:11:16,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597319071] [2022-11-18 20:11:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:16,075 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-18 20:11:16,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:11:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:11:16,124 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:11:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:16,265 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-11-18 20:11:16,267 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2022-11-18 20:11:16,270 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:16,276 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2022-11-18 20:11:16,277 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-11-18 20:11:16,277 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2022-11-18 20:11:16,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2022-11-18 20:11:16,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:11:16,281 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-18 20:11:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2022-11-18 20:11:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-18 20:11:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:11:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-18 20:11:16,323 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-18 20:11:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:11:16,331 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-18 20:11:16,331 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-18 20:11:16,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2022-11-18 20:11:16,333 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:16,333 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:16,333 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:16,334 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-18 20:11:16,334 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:16,334 INFO L748 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 69#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 66#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 67#rec2ENTRY [2022-11-18 20:11:16,335 INFO L750 eck$LassoCheckResult]: Loop: 67#rec2ENTRY ~j := #in~j; 79#L18 assume !(~j <= 0); 73#L20 call #t~ret3 := rec1(~j);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume !(~i <= 0); 74#L14 call #t~ret0 := rec1(~i - 2);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#28#return; 71#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#30#return; 72#L14-2 call #t~ret2 := rec1(#t~ret1);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#32#return; 70#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 75#rec1FINAL assume true; 81#rec1EXIT >#34#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 67#rec2ENTRY [2022-11-18 20:11:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2022-11-18 20:11:16,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200214727] [2022-11-18 20:11:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,343 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2022-11-18 20:11:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439158369] [2022-11-18 20:11:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2022-11-18 20:11:16,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:16,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284495538] [2022-11-18 20:11:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:16,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:16,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:16,870 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:16,871 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:16,871 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:16,871 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:16,871 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:11:16,871 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:16,871 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:16,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:16,872 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2022-11-18 20:11:16,872 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:16,872 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:16,888 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:16,897 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:16,900 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:16,903 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:16,911 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:16,949 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:16,950 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:11:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:16,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:16,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:16,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:16,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-18 20:11:16,999 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:17,000 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:17,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,021 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:17,021 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:17,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-18 20:11:17,044 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:17,044 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:17,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,069 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:17,069 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:17,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-18 20:11:17,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:17,099 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:17,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:17,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:17,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-18 20:11:17,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:11:17,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-18 20:11:17,211 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:11:17,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,219 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:17,219 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:17,219 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:17,220 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:17,220 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:11:17,220 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,220 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:17,220 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:17,220 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2022-11-18 20:11:17,220 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:17,220 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:17,221 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:17,225 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:17,229 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:17,233 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:17,245 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:17,288 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:17,292 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:11:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,309 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 [2022-11-18 20:11:17,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-18 20:11:17,323 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:17,324 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:17,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:17,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:17,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:17,327 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:17,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:17,342 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:17,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,362 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 [2022-11-18 20:11:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-18 20:11:17,377 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:17,377 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:17,377 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:17,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:17,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:17,379 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:17,379 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:17,390 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:17,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,414 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 [2022-11-18 20:11:17,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-18 20:11:17,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:17,428 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:17,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:17,429 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:17,429 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:17,429 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:17,430 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:17,439 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:17,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,464 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 [2022-11-18 20:11:17,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-18 20:11:17,477 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:17,477 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:17,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:17,478 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:17,478 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:17,479 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:17,479 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:17,499 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:11:17,504 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-18 20:11:17,504 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-18 20:11:17,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,517 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:11:17,517 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:11:17,517 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:11:17,518 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2022-11-18 20:11:17,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-18 20:11:17,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:17,529 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:11:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:11:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:11:17,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:11:17,903 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2022-11-18 20:11:17,905 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:18,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,427 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 102 states and 148 transitions. Complement of second has 42 states. [2022-11-18 20:11:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2022-11-18 20:11:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2022-11-18 20:11:18,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2022-11-18 20:11:18,439 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:18,440 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2022-11-18 20:11:18,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:18,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2022-11-18 20:11:18,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:18,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2022-11-18 20:11:18,457 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:18,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2022-11-18 20:11:18,469 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2022-11-18 20:11:18,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2022-11-18 20:11:18,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2022-11-18 20:11:18,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:18,471 INFO L218 hiAutomatonCegarLoop]: Abstraction has 90 states and 136 transitions. [2022-11-18 20:11:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2022-11-18 20:11:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-11-18 20:11:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-18 20:11:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2022-11-18 20:11:18,493 INFO L240 hiAutomatonCegarLoop]: Abstraction has 63 states and 99 transitions. [2022-11-18 20:11:18,493 INFO L428 stractBuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2022-11-18 20:11:18,493 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-18 20:11:18,493 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2022-11-18 20:11:18,501 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:18,502 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:18,502 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:18,503 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:18,503 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-18 20:11:18,504 INFO L748 eck$LassoCheckResult]: Stem: 349#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 350#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 346#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 369#rec2ENTRY ~j := #in~j; 379#L18 assume !(~j <= 0); 372#L20 call #t~ret3 := rec1(~j);< 389#rec1ENTRY ~i := #in~i; 381#L12 assume !(~i <= 0); 353#L14 call #t~ret0 := rec1(~i - 2);< 370#rec1ENTRY [2022-11-18 20:11:18,504 INFO L750 eck$LassoCheckResult]: Loop: 370#rec1ENTRY ~i := #in~i; 383#L12 assume !(~i <= 0); 352#L14 call #t~ret0 := rec1(~i - 2);< 370#rec1ENTRY [2022-11-18 20:11:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2022-11-18 20:11:18,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:18,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62050605] [2022-11-18 20:11:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:18,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2022-11-18 20:11:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:18,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965479141] [2022-11-18 20:11:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2022-11-18 20:11:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:18,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841218910] [2022-11-18 20:11:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:18,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:18,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:18,611 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:18,611 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:18,611 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:18,611 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:18,612 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:11:18,612 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,612 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:18,612 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:18,612 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2022-11-18 20:11:18,612 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:18,613 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:18,613 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,616 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,618 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,621 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,623 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,629 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,656 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:18,656 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:11:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,672 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:18,672 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-18 20:11:18,700 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:18,700 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:18,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,714 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:18,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-18 20:11:18,744 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:18,744 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:18,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,754 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-18 20:11:18,761 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:18,761 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,783 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:18,783 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:18,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:18,797 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-18 20:11:18,819 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:18,819 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:18,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,840 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:18,840 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-11-18 20:11:18,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:11:18,882 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:18,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-11-18 20:11:18,923 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:11:18,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,932 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:18,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:18,932 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:18,932 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:18,932 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:11:18,932 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,932 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:18,932 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:18,932 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2022-11-18 20:11:18,932 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:18,933 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:18,933 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,938 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,941 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,943 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,946 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,952 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:18,995 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:18,995 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:11:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-11-18 20:11:19,004 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 [2022-11-18 20:11:19,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,017 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,017 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,017 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,017 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,022 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:19,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-11-18 20:11:19,031 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 [2022-11-18 20:11:19,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,049 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:19,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-11-18 20:11:19,062 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 [2022-11-18 20:11:19,075 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,075 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,075 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,075 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,075 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,076 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,076 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,082 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:19,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-11-18 20:11:19,091 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-18 20:11:19,105 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,105 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,105 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,105 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,106 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,106 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,106 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,116 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:19,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,120 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-11-18 20:11:19,123 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 [2022-11-18 20:11:19,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,133 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,133 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,133 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,133 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,140 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,144 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:11:19,152 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-18 20:11:19,152 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:11:19,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,153 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-11-18 20:11:19,156 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:11:19,156 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:11:19,156 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:11:19,156 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-18 20:11:19,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,180 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:11:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:11:19,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:19,271 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 [2022-11-18 20:11:19,272 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:19,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,354 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 109 states and 166 transitions. Complement of second has 13 states. [2022-11-18 20:11:19,357 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 [2022-11-18 20:11:19,358 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) [2022-11-18 20:11:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2022-11-18 20:11:19,359 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2022-11-18 20:11:19,359 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:19,360 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2022-11-18 20:11:19,360 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:19,360 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2022-11-18 20:11:19,360 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:19,360 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2022-11-18 20:11:19,363 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:19,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2022-11-18 20:11:19,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2022-11-18 20:11:19,367 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2022-11-18 20:11:19,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2022-11-18 20:11:19,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:19,369 INFO L218 hiAutomatonCegarLoop]: Abstraction has 97 states and 154 transitions. [2022-11-18 20:11:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2022-11-18 20:11:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-11-18 20:11:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2022-11-18 20:11:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2022-11-18 20:11:19,390 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 144 transitions. [2022-11-18 20:11:19,390 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2022-11-18 20:11:19,390 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-18 20:11:19,390 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2022-11-18 20:11:19,392 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:19,396 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:19,396 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:19,397 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:19,398 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-18 20:11:19,398 INFO L748 eck$LassoCheckResult]: Stem: 589#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 590#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 585#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 613#rec2ENTRY ~j := #in~j; 622#L18 assume !(~j <= 0); 625#L20 call #t~ret3 := rec1(~j);< 652#rec1ENTRY ~i := #in~i; 651#L12 assume !(~i <= 0); 595#L14 call #t~ret0 := rec1(~i - 2);< 630#rec1ENTRY ~i := #in~i; 628#L12 assume ~i <= 0;#res := 0; 616#rec1FINAL assume true; 617#rec1EXIT >#28#return; 599#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 614#rec1ENTRY [2022-11-18 20:11:19,398 INFO L750 eck$LassoCheckResult]: Loop: 614#rec1ENTRY ~i := #in~i; 650#L12 assume !(~i <= 0); 594#L14 call #t~ret0 := rec1(~i - 2);< 614#rec1ENTRY [2022-11-18 20:11:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2022-11-18 20:11:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192543643] [2022-11-18 20:11:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:19,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:19,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:19,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2022-11-18 20:11:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989985408] [2022-11-18 20:11:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:19,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:19,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2022-11-18 20:11:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292520137] [2022-11-18 20:11:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:11:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:11:19,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:19,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292520137] [2022-11-18 20:11:19,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292520137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:19,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:19,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:11:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098491081] [2022-11-18 20:11:19,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:19,602 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:19,602 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:19,602 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:19,602 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:19,603 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:11:19,603 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,603 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:19,603 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:19,603 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2022-11-18 20:11:19,603 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:19,603 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:19,605 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,607 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,613 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,615 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,617 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,620 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,655 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:19,655 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:11:19,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,659 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:19,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:19,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-11-18 20:11:19,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:19,691 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:19,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,701 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,708 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:19,708 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-11-18 20:11:19,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-11-18 20:11:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-11-18 20:11:19,742 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:11:19,742 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:19,805 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:11:19,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2022-11-18 20:11:19,808 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:19,808 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:19,809 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:19,809 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:19,809 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:11:19,809 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,809 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:19,809 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:19,809 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2022-11-18 20:11:19,809 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:19,809 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:19,810 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,821 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,827 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,830 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,833 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,835 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:19,872 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:19,872 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:11:19,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,874 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,880 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 [2022-11-18 20:11:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-11-18 20:11:19,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,893 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,893 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,893 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,893 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,893 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,893 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,902 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:19,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,908 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,915 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 [2022-11-18 20:11:19,928 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:19,928 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:19,928 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:19,928 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:19,928 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:19,929 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:19,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-11-18 20:11:19,947 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:11:19,949 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-18 20:11:19,949 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:11:19,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:19,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,950 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-11-18 20:11:19,955 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:11:19,955 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:11:19,955 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:11:19,955 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-18 20:11:19,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,965 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:11:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:11:20,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:20,120 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 [2022-11-18 20:11:20,120 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:11:20,231 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 133 states and 208 transitions. Complement of second has 14 states. [2022-11-18 20:11:20,232 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 [2022-11-18 20:11:20,233 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) [2022-11-18 20:11:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-18 20:11:20,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2022-11-18 20:11:20,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:20,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2022-11-18 20:11:20,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:20,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2022-11-18 20:11:20,236 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:20,236 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2022-11-18 20:11:20,244 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:20,248 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2022-11-18 20:11:20,249 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2022-11-18 20:11:20,249 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2022-11-18 20:11:20,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2022-11-18 20:11:20,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:20,249 INFO L218 hiAutomatonCegarLoop]: Abstraction has 121 states and 196 transitions. [2022-11-18 20:11:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2022-11-18 20:11:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2022-11-18 20:11:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 76 states have internal predecessors, (80), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2022-11-18 20:11:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2022-11-18 20:11:20,264 INFO L240 hiAutomatonCegarLoop]: Abstraction has 117 states and 186 transitions. [2022-11-18 20:11:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:11:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:11:20,265 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:11:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:20,322 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2022-11-18 20:11:20,322 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2022-11-18 20:11:20,325 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-18 20:11:20,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2022-11-18 20:11:20,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2022-11-18 20:11:20,329 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2022-11-18 20:11:20,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2022-11-18 20:11:20,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:20,329 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 194 transitions. [2022-11-18 20:11:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2022-11-18 20:11:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2022-11-18 20:11:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2022-11-18 20:11:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2022-11-18 20:11:20,341 INFO L240 hiAutomatonCegarLoop]: Abstraction has 105 states and 158 transitions. [2022-11-18 20:11:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:11:20,342 INFO L428 stractBuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2022-11-18 20:11:20,342 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-18 20:11:20,342 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2022-11-18 20:11:20,343 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-11-18 20:11:20,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:20,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:20,344 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:20,344 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:20,345 INFO L748 eck$LassoCheckResult]: Stem: 1161#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1162#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1157#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1185#rec2ENTRY ~j := #in~j; 1225#L18 assume !(~j <= 0); 1216#L20 call #t~ret3 := rec1(~j);< 1224#rec1ENTRY ~i := #in~i; 1223#L12 assume !(~i <= 0); 1169#L14 call #t~ret0 := rec1(~i - 2);< 1221#rec1ENTRY ~i := #in~i; 1219#L12 assume !(~i <= 0); 1164#L14 call #t~ret0 := rec1(~i - 2);< 1218#rec1ENTRY ~i := #in~i; 1220#L12 assume ~i <= 0;#res := 0; 1235#rec1FINAL assume true; 1198#rec1EXIT >#28#return; 1188#L14-1 [2022-11-18 20:11:20,345 INFO L750 eck$LassoCheckResult]: Loop: 1188#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1189#rec1ENTRY ~i := #in~i; 1207#L12 assume ~i <= 0;#res := 0; 1192#rec1FINAL assume true; 1194#rec1EXIT >#30#return; 1166#L14-2 call #t~ret2 := rec1(#t~ret1);< 1186#rec1ENTRY ~i := #in~i; 1231#L12 assume !(~i <= 0); 1168#L14 call #t~ret0 := rec1(~i - 2);< 1186#rec1ENTRY ~i := #in~i; 1231#L12 assume ~i <= 0;#res := 0; 1230#rec1FINAL assume true; 1229#rec1EXIT >#28#return; 1188#L14-1 [2022-11-18 20:11:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2022-11-18 20:11:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:20,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404259862] [2022-11-18 20:11:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2022-11-18 20:11:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:20,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127025793] [2022-11-18 20:11:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-18 20:11:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:11:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:11:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127025793] [2022-11-18 20:11:20,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127025793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799819652] [2022-11-18 20:11:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:20,435 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:20,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:11:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:11:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:20,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:20,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799819652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:20,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:11:20,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-18 20:11:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75124993] [2022-11-18 20:11:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:20,495 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-18 20:11:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:11:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:11:20,496 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:11:20,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:20,580 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2022-11-18 20:11:20,580 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2022-11-18 20:11:20,582 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:20,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2022-11-18 20:11:20,586 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2022-11-18 20:11:20,586 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2022-11-18 20:11:20,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2022-11-18 20:11:20,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:20,586 INFO L218 hiAutomatonCegarLoop]: Abstraction has 115 states and 165 transitions. [2022-11-18 20:11:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2022-11-18 20:11:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-11-18 20:11:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.109375) internal successors, (71), 69 states have internal predecessors, (71), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2022-11-18 20:11:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2022-11-18 20:11:20,597 INFO L240 hiAutomatonCegarLoop]: Abstraction has 112 states and 162 transitions. [2022-11-18 20:11:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:11:20,598 INFO L428 stractBuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2022-11-18 20:11:20,598 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-18 20:11:20,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2022-11-18 20:11:20,608 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-18 20:11:20,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:20,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:20,609 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:20,609 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-18 20:11:20,610 INFO L748 eck$LassoCheckResult]: Stem: 1445#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1446#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;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1441#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1462#rec2ENTRY ~j := #in~j; 1525#L18 assume !(~j <= 0); 1448#L20 call #t~ret3 := rec1(~j);< 1511#rec1ENTRY ~i := #in~i; 1509#L12 assume !(~i <= 0); 1471#L14 call #t~ret0 := rec1(~i - 2);< 1506#rec1ENTRY ~i := #in~i; 1505#L12 assume !(~i <= 0); 1469#L14 call #t~ret0 := rec1(~i - 2);< 1504#rec1ENTRY ~i := #in~i; 1507#L12 assume ~i <= 0;#res := 0; 1521#rec1FINAL assume true; 1518#rec1EXIT >#28#return; 1476#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1477#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1480#rec1FINAL assume true; 1481#rec1EXIT >#30#return; 1463#L14-2 call #t~ret2 := rec1(#t~ret1);< 1473#rec1ENTRY ~i := #in~i; 1524#L12 assume ~i <= 0;#res := 0; 1522#rec1FINAL assume true; 1484#rec1EXIT >#32#return; 1485#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1520#rec1FINAL assume true; 1517#rec1EXIT >#28#return; 1465#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1494#rec1ENTRY [2022-11-18 20:11:20,610 INFO L750 eck$LassoCheckResult]: Loop: 1494#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1466#L14 call #t~ret0 := rec1(~i - 2);< 1494#rec1ENTRY [2022-11-18 20:11:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2022-11-18 20:11:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:20,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601533035] [2022-11-18 20:11:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2022-11-18 20:11:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33290201] [2022-11-18 20:11:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,645 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:20,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2022-11-18 20:11:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294538917] [2022-11-18 20:11:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:11:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:11:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:11:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:11:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:11:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294538917] [2022-11-18 20:11:20,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294538917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360187293] [2022-11-18 20:11:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:20,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:11:20,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:11:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:11:21,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360187293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:21,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:21,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-11-18 20:11:21,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810232613] [2022-11-18 20:11:21,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:21,063 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:21,063 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:21,064 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:21,064 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:21,064 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:11:21,064 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,064 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:21,064 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:21,064 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2022-11-18 20:11:21,064 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:21,065 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:21,066 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,069 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,071 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,075 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,077 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,079 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,109 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:21,109 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:11:21,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,115 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,120 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-11-18 20:11:21,144 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:21,144 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:21,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2022-11-18 20:11:21,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,148 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,152 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-11-18 20:11:21,164 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:21,164 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:21,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2022-11-18 20:11:21,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,168 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-11-18 20:11:21,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,183 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:21,184 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:21,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2022-11-18 20:11:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,187 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-11-18 20:11:21,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,190 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,203 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:21,203 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:21,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2022-11-18 20:11:21,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,207 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,216 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-11-18 20:11:21,228 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:21,228 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:21,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,232 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2022-11-18 20:11:21,235 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:21,235 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,282 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:11:21,288 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:21,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-11-18 20:11:21,335 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:11:21,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,339 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:21,339 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:21,340 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:21,340 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:21,340 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:11:21,340 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,340 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:21,340 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:21,340 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2022-11-18 20:11:21,340 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:21,340 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:21,341 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,346 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,350 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,353 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,356 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,359 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:21,402 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:21,402 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:11:21,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,404 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-11-18 20:11:21,408 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 [2022-11-18 20:11:21,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,420 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,420 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,420 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,420 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,421 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,421 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,430 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:21,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2022-11-18 20:11:21,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,434 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-11-18 20:11:21,441 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 [2022-11-18 20:11:21,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,454 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:21,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,458 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-11-18 20:11:21,461 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 [2022-11-18 20:11:21,471 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,472 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,472 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,472 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,472 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,472 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,499 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:21,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,504 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,511 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 [2022-11-18 20:11:21,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-11-18 20:11:21,524 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,524 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,524 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,525 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,525 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,525 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,543 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:21,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,552 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-11-18 20:11:21,556 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 [2022-11-18 20:11:21,568 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,569 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,569 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,569 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,569 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,569 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,591 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:11:21,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,602 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-11-18 20:11:21,603 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 [2022-11-18 20:11:21,613 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:21,613 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:21,614 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:21,614 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:21,614 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:21,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:21,614 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:21,639 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:11:21,641 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-18 20:11:21,641 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:11:21,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:21,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,647 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,651 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:11:21,651 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:11:21,651 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:11:21,652 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-18 20:11:21,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-11-18 20:11:21,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:21,656 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:11:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:21,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:22,071 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 [2022-11-18 20:11:22,073 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,131 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2022-11-18 20:11:22,132 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 [2022-11-18 20:11:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-18 20:11:22,135 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:22,135 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:22,135 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-18 20:11:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:22,466 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 [2022-11-18 20:11:22,466 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,519 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2022-11-18 20:11:22,520 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 [2022-11-18 20:11:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-18 20:11:22,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:22,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:22,526 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-18 20:11:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:22,851 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 [2022-11-18 20:11:22,851 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 157 states and 219 transitions. Complement of second has 13 states. [2022-11-18 20:11:22,948 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 [2022-11-18 20:11:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2022-11-18 20:11:22,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:22,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:22,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-18 20:11:22,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:22,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2022-11-18 20:11:22,952 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:22,952 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2022-11-18 20:11:22,954 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2022-11-18 20:11:22,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2022-11-18 20:11:22,963 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2022-11-18 20:11:22,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2022-11-18 20:11:22,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2022-11-18 20:11:22,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:22,964 INFO L218 hiAutomatonCegarLoop]: Abstraction has 139 states and 201 transitions. [2022-11-18 20:11:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2022-11-18 20:11:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2022-11-18 20:11:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2022-11-18 20:11:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2022-11-18 20:11:22,999 INFO L240 hiAutomatonCegarLoop]: Abstraction has 120 states and 170 transitions. [2022-11-18 20:11:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:11:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:11:23,000 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:11:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:23,076 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-11-18 20:11:23,077 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2022-11-18 20:11:23,078 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-18 20:11:23,080 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2022-11-18 20:11:23,081 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2022-11-18 20:11:23,081 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2022-11-18 20:11:23,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2022-11-18 20:11:23,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:11:23,082 INFO L218 hiAutomatonCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-11-18 20:11:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2022-11-18 20:11:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2022-11-18 20:11:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:11:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-11-18 20:11:23,095 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-11-18 20:11:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:11:23,097 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-11-18 20:11:23,097 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-11-18 20:11:23,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2022-11-18 20:11:23,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-18 20:11:23,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:11:23,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:11:23,099 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:23,099 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-18 20:11:23,099 INFO L748 eck$LassoCheckResult]: Stem: 2781#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2782#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;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 2779#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 2789#rec2ENTRY ~j := #in~j; 2800#L18 assume !(~j <= 0); 2794#L20 call #t~ret3 := rec1(~j);< 2809#rec1ENTRY ~i := #in~i; 2820#L12 assume !(~i <= 0); 2787#L14 call #t~ret0 := rec1(~i - 2);< 2822#rec1ENTRY ~i := #in~i; 2823#L12 assume ~i <= 0;#res := 0; 2821#rec1FINAL assume true; 2799#rec1EXIT >#28#return; 2792#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2795#rec1ENTRY ~i := #in~i; 2806#L12 assume ~i <= 0;#res := 0; 2796#rec1FINAL assume true; 2798#rec1EXIT >#30#return; 2814#L14-2 call #t~ret2 := rec1(#t~ret1);< 2791#rec1ENTRY ~i := #in~i; 2816#L12 assume ~i <= 0;#res := 0; 2815#rec1FINAL assume true; 2813#rec1EXIT >#32#return; 2812#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2811#rec1FINAL assume true; 2810#rec1EXIT >#34#return; 2778#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2780#rec2ENTRY ~j := #in~j; 2802#L18 assume !(~j <= 0); 2803#L20 call #t~ret3 := rec1(~j);< 2807#rec1ENTRY [2022-11-18 20:11:23,099 INFO L750 eck$LassoCheckResult]: Loop: 2807#rec1ENTRY ~i := #in~i; 2804#L12 assume !(~i <= 0); 2805#L14 call #t~ret0 := rec1(~i - 2);< 2807#rec1ENTRY [2022-11-18 20:11:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2022-11-18 20:11:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101955670] [2022-11-18 20:11:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:11:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:11:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:11:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:11:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:11:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101955670] [2022-11-18 20:11:23,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101955670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196479131] [2022-11-18 20:11:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:23,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:23,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,263 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-18 20:11:23,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:11:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:11:23,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196479131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:23,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:23,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-11-18 20:11:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084464988] [2022-11-18 20:11:23,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:23,442 INFO L753 eck$LassoCheckResult]: stem already infeasible [2022-11-18 20:11:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2022-11-18 20:11:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422591470] [2022-11-18 20:11:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:23,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:11:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:11:23,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:11:23,477 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:23,477 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:23,477 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:23,477 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:23,477 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:11:23,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:23,478 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:23,478 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2022-11-18 20:11:23,478 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:23,478 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:23,479 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,482 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,488 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,490 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,492 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,494 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,523 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:23,524 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:11:23,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,525 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,535 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:23,535 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2022-11-18 20:11:23,563 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:11:23,563 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:11:23,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:23,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,569 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,572 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:11:23,572 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:23,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2022-11-18 20:11:23,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:23,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,604 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,608 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:11:23,608 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:11:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2022-11-18 20:11:23,641 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:11:23,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:23,645 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:11:23,645 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:11:23,645 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:11:23,645 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:11:23,646 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:11:23,646 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,646 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:11:23,646 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:11:23,646 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2022-11-18 20:11:23,646 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:11:23,646 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:11:23,647 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,657 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,660 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,662 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,664 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,676 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:11:23,710 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:11:23,711 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:11:23,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,712 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,723 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 [2022-11-18 20:11:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2022-11-18 20:11:23,736 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:11:23,736 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:11:23,737 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:11:23,737 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:11:23,737 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:11:23,738 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:11:23,738 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:11:23,755 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:11:23,757 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-18 20:11:23,757 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:11:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:11:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:23,759 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:23,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2022-11-18 20:11:23,761 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:11:23,761 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:11:23,762 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:11:23,762 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-18 20:11:23,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:23,765 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:11:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:24,091 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 [2022-11-18 20:11:24,092 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,157 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2022-11-18 20:11:24,157 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 [2022-11-18 20:11:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2022-11-18 20:11:24,158 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:24,158 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:24,159 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-18 20:11:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:24,468 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 [2022-11-18 20:11:24,468 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,533 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2022-11-18 20:11:24,533 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 [2022-11-18 20:11:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2022-11-18 20:11:24,534 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:24,534 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:24,535 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-18 20:11:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:24,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:24,862 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 [2022-11-18 20:11:24,863 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,944 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 78 states and 90 transitions. Complement of second has 13 states. [2022-11-18 20:11:24,945 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 [2022-11-18 20:11:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2022-11-18 20:11:24,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2022-11-18 20:11:24,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:24,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-18 20:11:24,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:24,947 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2022-11-18 20:11:24,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:11:24,947 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2022-11-18 20:11:24,948 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-18 20:11:24,948 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2022-11-18 20:11:24,949 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-18 20:11:24,949 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-18 20:11:24,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-18 20:11:24,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:11:24,949 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:11:24,949 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:11:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:11:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:11:24,950 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:11:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:24,951 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-11-18 20:11:24,951 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2022-11-18 20:11:24,951 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-18 20:11:24,951 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 20:11:24,951 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-18 20:11:24,951 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-18 20:11:24,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-18 20:11:24,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:11:24,952 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:11:24,952 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:11:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:11:24,952 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:11:24,952 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-11-18 20:11:24,953 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-18 20:11:24,953 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-18 20:11:24,953 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-18 20:11:24,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 08:11:24 BoogieIcfgContainer [2022-11-18 20:11:24,961 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-18 20:11:24,961 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:11:24,961 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:11:24,962 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:11:24,962 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:15" (3/4) ... [2022-11-18 20:11:24,965 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-18 20:11:24,965 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:11:24,966 INFO L158 Benchmark]: Toolchain (without parser) took 10098.93ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 88.1MB in the beginning and 106.7MB in the end (delta: -18.6MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2022-11-18 20:11:24,966 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:11:24,967 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.61ms. Allocated memory is still 125.8MB. Free memory was 87.8MB in the beginning and 103.4MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:11:24,967 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.22ms. Allocated memory is still 125.8MB. Free memory was 103.4MB in the beginning and 101.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:11:24,967 INFO L158 Benchmark]: Boogie Preprocessor took 20.47ms. Allocated memory is still 125.8MB. Free memory was 101.8MB in the beginning and 100.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:11:24,968 INFO L158 Benchmark]: RCFGBuilder took 299.80ms. Allocated memory is still 125.8MB. Free memory was 100.7MB in the beginning and 91.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:11:24,968 INFO L158 Benchmark]: BuchiAutomizer took 9522.75ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 91.8MB in the beginning and 106.7MB in the end (delta: -14.9MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. [2022-11-18 20:11:24,968 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 182.5MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:11:24,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.61ms. Allocated memory is still 125.8MB. Free memory was 87.8MB in the beginning and 103.4MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.22ms. Allocated memory is still 125.8MB. Free memory was 103.4MB in the beginning and 101.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.47ms. Allocated memory is still 125.8MB. Free memory was 101.8MB in the beginning and 100.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 299.80ms. Allocated memory is still 125.8MB. Free memory was 100.7MB in the beginning and 91.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 9522.75ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 91.8MB in the beginning and 106.7MB in the end (delta: -14.9MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 182.5MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.4s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 4.7s. Construction of modules took 0.5s. Büchi inclusion checks took 3.8s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 221 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 198 mSDsluCounter, 504 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 305 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353 IncrementalHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 199 mSDtfsCounter, 353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq148 hnf94 smp100 dnf100 smp100 tf112 neg94 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 49ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-18 20:11:24,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:25,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:25,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:25,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ebde26-2935-454e-a0ff-b84ada94a482/bin/uautomizer-TMbwUNV5ro/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