./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:03:39,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:03:39,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:03:39,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:03:39,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:03:39,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:03:39,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:03:39,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:03:39,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:03:39,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:03:39,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:03:39,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:03:39,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:03:39,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:03:39,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:03:39,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:03:39,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:03:39,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:03:39,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:03:39,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:03:39,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:03:39,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:03:39,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:03:39,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:03:39,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:03:39,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:03:39,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:03:39,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:03:39,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:03:39,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:03:39,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:03:39,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:03:39,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:03:39,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:03:39,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:03:39,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:03:39,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:03:39,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:03:39,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:03:39,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:03:39,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:03:39,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 09:03:39,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:03:39,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:03:39,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:03:39,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:03:39,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:03:39,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:03:39,820 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:03:39,820 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:03:39,821 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:03:39,821 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:03:39,822 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:03:39,823 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:03:39,823 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:03:39,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:03:39,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:03:39,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:03:39,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:03:39,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:03:39,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:03:39,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:03:39,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:03:39,826 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:03:39,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:03:39,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:03:39,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:03:39,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:03:39,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:03:39,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:03:39,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:03:39,832 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:03:39,832 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_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2021-10-28 09:03:40,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:03:40,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:03:40,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:03:40,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:03:40,165 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:03:40,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-10-28 09:03:40,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/data/2293ea72d/dd3f4f03e49c4df08427fe9abe66165d/FLAG60e8a7f52 [2021-10-28 09:03:40,753 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:03:40,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-10-28 09:03:40,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/data/2293ea72d/dd3f4f03e49c4df08427fe9abe66165d/FLAG60e8a7f52 [2021-10-28 09:03:41,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/data/2293ea72d/dd3f4f03e49c4df08427fe9abe66165d [2021-10-28 09:03:41,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:03:41,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:03:41,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:03:41,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:03:41,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:03:41,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee08873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41, skipping insertion in model container [2021-10-28 09:03:41,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:03:41,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:03:41,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:03:41,405 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:03:41,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:03:41,461 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:03:41,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41 WrapperNode [2021-10-28 09:03:41,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:03:41,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:03:41,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:03:41,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:03:41,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:03:41,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:03:41,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:03:41,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:03:41,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:03:41,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:03:41,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:03:41,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:03:41,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (1/1) ... [2021-10-28 09:03:41,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:41,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:41,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:03:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-28 09:03:41,618 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-28 09:03:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-28 09:03:41,619 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-28 09:03:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:03:41,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:03:41,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:03:41,789 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:03:41,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:41 BoogieIcfgContainer [2021-10-28 09:03:41,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:03:41,793 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:03:41,793 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:03:41,815 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:03:41,816 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:03:41,816 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:03:41" (1/3) ... [2021-10-28 09:03:41,817 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@45f01527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:03:41, skipping insertion in model container [2021-10-28 09:03:41,818 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:03:41,818 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:41" (2/3) ... [2021-10-28 09:03:41,818 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@45f01527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:03:41, skipping insertion in model container [2021-10-28 09:03:41,819 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:03:41,819 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:41" (3/3) ... [2021-10-28 09:03:41,820 INFO L389 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2021-10-28 09:03:41,927 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:03:41,937 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:03:41,937 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:03:41,938 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:03:41,938 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:03:41,938 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:03:41,938 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:03:41,938 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:03:41,969 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-10-28 09:03:42,024 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:42,024 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:42,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:42,041 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:03:42,042 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:42,042 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:03:42,042 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-10-28 09:03:42,046 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:42,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:42,046 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:42,047 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:03:42,047 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:42,058 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 10#L25true call main_#t~ret6 := rec2(main_~x~0);< 16#rec2ENTRYtrue [2021-10-28 09:03:42,059 INFO L793 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j - 1);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#33#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3);< 16#rec2ENTRYtrue [2021-10-28 09:03:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2021-10-28 09:03:42,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:42,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617679963] [2021-10-28 09:03:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:42,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,172 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,207 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2021-10-28 09:03:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:42,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607573801] [2021-10-28 09:03:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:42,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,249 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,270 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2021-10-28 09:03:42,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:42,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111049055] [2021-10-28 09:03:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:42,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,297 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:42,313 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:42,628 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:42,629 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:42,629 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:42,629 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:42,630 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:42,630 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:42,630 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:42,630 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:42,631 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-10-28 09:03:42,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:42,631 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:42,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:42,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:42,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:42,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:42,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:42,724 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:42,725 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:42,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:42,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:42,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:42,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:42,736 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:42,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:03:42,769 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:42,769 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:42,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-10-28 09:03:42,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:42,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:42,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:42,821 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:42,822 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:42,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:03:42,856 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:42,856 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:42,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:42,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:42,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:42,905 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:42,905 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:42,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:03:42,932 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:42,932 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:42,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:42,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:42,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:42,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:03:42,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:42,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:43,008 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:43,008 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:43,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:43,059 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:43,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:03:43,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:43,197 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:03:43,235 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:03:43,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,278 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:43,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:43,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:43,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:43,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:03:43,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:43,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:43,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-10-28 09:03:43,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:43,279 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:43,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:43,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:43,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:43,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:43,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:43,362 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:43,367 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:03:43,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,377 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 [2021-10-28 09:03:43,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:43,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:43,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:03:43,390 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:43,390 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:43,390 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:43,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:43,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:43,405 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:43,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-10-28 09:03:43,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,434 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,437 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 [2021-10-28 09:03:43,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:43,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:43,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:43,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:43,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:43,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:43,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:43,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:03:43,467 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:43,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,521 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 [2021-10-28 09:03:43,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:43,533 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:43,533 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:43,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:43,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:43,534 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:43,534 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:43,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:03:43,556 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:43,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:03:43,612 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 [2021-10-28 09:03:43,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:43,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:43,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:43,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:43,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:43,626 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:43,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:43,644 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:03:43,651 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:03:43,651 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:03:43,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:43,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:43,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:03:43,676 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:03:43,678 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:03:43,678 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:03:43,679 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2021-10-28 09:03:43,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:43,725 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:03:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:03:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:03:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:43,973 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2021-10-28 09:03:43,974 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:44,598 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6). Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 194 states and 279 transitions. Complement of second has 61 states. [2021-10-28 09:03:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2021-10-28 09:03:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2021-10-28 09:03:44,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2021-10-28 09:03:44,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:44,608 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2021-10-28 09:03:44,609 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:44,609 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2021-10-28 09:03:44,610 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:44,611 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2021-10-28 09:03:44,650 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:44,668 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2021-10-28 09:03:44,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-10-28 09:03:44,671 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2021-10-28 09:03:44,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2021-10-28 09:03:44,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:44,672 INFO L681 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2021-10-28 09:03:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2021-10-28 09:03:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2021-10-28 09:03:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2021-10-28 09:03:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2021-10-28 09:03:44,735 INFO L704 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2021-10-28 09:03:44,735 INFO L587 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2021-10-28 09:03:44,735 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:03:44,735 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2021-10-28 09:03:44,740 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:44,740 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:44,740 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:44,741 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:44,741 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:03:44,741 INFO L791 eck$LassoCheckResult]: Stem: 350#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 347#L25 call main_#t~ret6 := rec2(main_~x~0);< 363#rec2ENTRY ~j := #in~j; 379#L18 assume !(~j <= 0); 352#L20 call #t~ret3 := rec1(~j - 1);< 383#rec1ENTRY ~i := #in~i; 380#L12 assume !(~i <= 0); 365#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-10-28 09:03:44,741 INFO L793 eck$LassoCheckResult]: Loop: 371#rec1ENTRY ~i := #in~i; 385#L12 assume !(~i <= 0); 368#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-10-28 09:03:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2021-10-28 09:03:44,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:44,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411091096] [2021-10-28 09:03:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:44,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,752 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,760 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2021-10-28 09:03:44,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:44,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037717259] [2021-10-28 09:03:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:44,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,766 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,772 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2021-10-28 09:03:44,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:44,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644490821] [2021-10-28 09:03:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:44,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,790 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:44,806 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:44,897 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:44,897 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:44,897 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:44,898 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:44,898 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:44,898 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:44,898 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:44,898 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:44,898 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-10-28 09:03:44,898 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:44,899 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:44,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:44,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:44,961 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:44,961 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:44,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:44,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:44,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:03:44,972 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:44,972 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:44,995 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:44,996 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:45,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 09:03:45,025 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:45,025 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,044 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:45,044 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:45,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:03:45,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:45,101 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,110 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:45,110 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:45,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:03:45,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:45,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,156 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:45,156 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:45,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:03:45,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:45,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:45,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:45,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,222 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:03:45,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:45,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 09:03:45,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:45,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:45,370 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:03:45,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,373 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:45,374 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:45,374 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:45,374 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:45,374 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:03:45,374 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,374 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:45,374 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:45,374 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-10-28 09:03:45,374 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:45,374 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:45,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:45,451 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:45,452 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:03:45,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,464 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 [2021-10-28 09:03:45,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 09:03:45,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:45,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:45,472 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:45,472 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:45,472 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:45,473 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:45,473 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:45,475 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:45,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-10-28 09:03:45,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,500 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 09:03:45,501 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 [2021-10-28 09:03:45,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:45,509 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:45,509 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:45,509 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:45,509 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:45,510 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:45,510 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:45,511 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:45,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,534 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 09:03:45,535 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 [2021-10-28 09:03:45,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:45,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:45,543 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:45,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:45,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:45,544 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:45,544 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:45,546 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:45,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-10-28 09:03:45,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,581 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 09:03:45,583 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 [2021-10-28 09:03:45,590 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:45,591 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:45,591 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:45,591 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:45,591 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:45,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:45,592 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:45,619 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:45,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:45,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,660 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,664 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 [2021-10-28 09:03:45,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:45,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:45,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:45,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:45,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:45,679 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:45,679 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:45,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 09:03:45,703 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:03:45,707 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:03:45,707 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:03:45,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:45,708 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 09:03:45,711 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:03:45,711 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:03:45,711 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:03:45,711 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-28 09:03:45,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-10-28 09:03:45,745 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:03:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:03:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:03:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:45,918 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 09:03:45,919 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-28 09:03:45,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 105 states and 149 transitions. Complement of second has 13 states. [2021-10-28 09:03:45,978 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 [2021-10-28 09:03:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-28 09:03:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2021-10-28 09:03:45,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-28 09:03:45,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:45,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2021-10-28 09:03:45,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:45,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-28 09:03:45,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:45,981 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2021-10-28 09:03:45,991 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:46,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2021-10-28 09:03:46,001 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2021-10-28 09:03:46,002 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-10-28 09:03:46,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2021-10-28 09:03:46,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:46,004 INFO L681 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2021-10-28 09:03:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2021-10-28 09:03:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-10-28 09:03:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.22) internal successors, (61), 57 states have internal predecessors, (61), 27 states have call successors, (27), 15 states have call predecessors, (27), 12 states have return successors, (41), 16 states have call predecessors, (41), 22 states have call successors, (41) [2021-10-28 09:03:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2021-10-28 09:03:46,024 INFO L704 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2021-10-28 09:03:46,024 INFO L587 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2021-10-28 09:03:46,024 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:03:46,024 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2021-10-28 09:03:46,028 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:46,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:46,029 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:46,030 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:46,030 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:03:46,030 INFO L791 eck$LassoCheckResult]: Stem: 577#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 572#L25 call main_#t~ret6 := rec2(main_~x~0);< 593#rec2ENTRY ~j := #in~j; 644#L18 assume !(~j <= 0); 597#L20 call #t~ret3 := rec1(~j - 1);< 614#rec1ENTRY ~i := #in~i; 608#L12 assume !(~i <= 0); 585#L14 call #t~ret0 := rec1(~i - 2);< 611#rec1ENTRY ~i := #in~i; 635#L12 assume ~i <= 0;#res := 0; 634#rec1FINAL assume true; 631#rec1EXIT >#27#return; 584#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 594#rec1ENTRY [2021-10-28 09:03:46,030 INFO L793 eck$LassoCheckResult]: Loop: 594#rec1ENTRY ~i := #in~i; 630#L12 assume !(~i <= 0); 579#L14 call #t~ret0 := rec1(~i - 2);< 594#rec1ENTRY [2021-10-28 09:03:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2021-10-28 09:03:46,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:46,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095284417] [2021-10-28 09:03:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:46,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:46,061 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:46,079 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2021-10-28 09:03:46,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:46,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185868371] [2021-10-28 09:03:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:46,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:46,087 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:46,092 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2021-10-28 09:03:46,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:46,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094329518] [2021-10-28 09:03:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:46,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:46,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:03:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:03:46,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:46,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094329518] [2021-10-28 09:03:46,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094329518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:46,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:46,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:03:46,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956628496] [2021-10-28 09:03:46,259 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:46,259 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:46,260 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:46,260 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:46,260 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:46,260 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,260 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:46,260 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:46,261 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-10-28 09:03:46,261 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:46,261 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:46,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,320 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:46,320 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:46,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,324 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:46,329 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 09:03:46,360 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:46,360 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:46,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:46,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,394 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 09:03:46,395 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:46,395 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:46,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:46,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,434 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 09:03:46,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:46,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:46,481 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:03:46,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-10-28 09:03:46,484 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:46,484 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:46,484 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:46,484 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:46,484 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:03:46,484 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,484 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:46,484 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:46,484 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-10-28 09:03:46,485 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:46,485 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:46,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:46,560 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:46,560 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:03:46,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,576 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:46,592 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 [2021-10-28 09:03:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 09:03:46,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:46,601 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:46,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:46,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:46,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:46,602 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:46,602 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:46,615 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:46,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-28 09:03:46,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,637 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 09:03:46,638 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 [2021-10-28 09:03:46,646 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:46,646 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:46,646 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:46,646 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:46,646 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:46,647 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:46,647 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:46,663 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:03:46,666 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:03:46,666 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:03:46,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:46,676 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:46,678 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:03:46,678 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:03:46,678 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:03:46,679 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-28 09:03:46,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 09:03:46,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:46,708 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:03:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:03:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:03:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:46,981 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 09:03:46,981 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 09:03:47,076 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 134 states and 193 transitions. Complement of second has 14 states. [2021-10-28 09:03:47,081 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 [2021-10-28 09:03:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 09:03:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-10-28 09:03:47,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2021-10-28 09:03:47,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:47,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2021-10-28 09:03:47,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:47,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2021-10-28 09:03:47,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:47,084 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2021-10-28 09:03:47,089 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:47,099 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2021-10-28 09:03:47,099 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-28 09:03:47,099 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2021-10-28 09:03:47,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2021-10-28 09:03:47,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:47,099 INFO L681 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2021-10-28 09:03:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2021-10-28 09:03:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-10-28 09:03:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.234375) internal successors, (79), 73 states have internal predecessors, (79), 33 states have call successors, (33), 19 states have call predecessors, (33), 16 states have return successors, (53), 20 states have call predecessors, (53), 28 states have call successors, (53) [2021-10-28 09:03:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2021-10-28 09:03:47,117 INFO L704 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2021-10-28 09:03:47,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:03:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:03:47,123 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-28 09:03:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:47,172 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2021-10-28 09:03:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:03:47,173 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2021-10-28 09:03:47,175 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-10-28 09:03:47,179 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2021-10-28 09:03:47,179 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2021-10-28 09:03:47,179 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2021-10-28 09:03:47,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2021-10-28 09:03:47,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:47,180 INFO L681 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2021-10-28 09:03:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2021-10-28 09:03:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-10-28 09:03:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 63 states have internal predecessors, (67), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (45), 20 states have call predecessors, (45), 26 states have call successors, (45) [2021-10-28 09:03:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2021-10-28 09:03:47,191 INFO L704 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2021-10-28 09:03:47,191 INFO L587 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2021-10-28 09:03:47,191 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:03:47,191 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2021-10-28 09:03:47,192 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:03:47,192 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:47,193 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:47,193 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:47,194 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:47,194 INFO L791 eck$LassoCheckResult]: Stem: 1133#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1127#L25 call main_#t~ret6 := rec2(main_~x~0);< 1149#rec2ENTRY ~j := #in~j; 1193#L18 assume !(~j <= 0); 1135#L20 call #t~ret3 := rec1(~j - 1);< 1192#rec1ENTRY ~i := #in~i; 1191#L12 assume !(~i <= 0); 1152#L14 call #t~ret0 := rec1(~i - 2);< 1190#rec1ENTRY ~i := #in~i; 1188#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1187#rec1ENTRY ~i := #in~i; 1189#L12 assume ~i <= 0;#res := 0; 1226#rec1FINAL assume true; 1170#rec1EXIT >#27#return; 1161#L14-1 [2021-10-28 09:03:47,194 INFO L793 eck$LassoCheckResult]: Loop: 1161#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1162#rec1ENTRY ~i := #in~i; 1182#L12 assume ~i <= 0;#res := 0; 1218#rec1FINAL assume true; 1214#rec1EXIT >#29#return; 1150#L14-2 call #t~ret2 := rec1(#t~ret1);< 1159#rec1ENTRY ~i := #in~i; 1217#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1159#rec1ENTRY ~i := #in~i; 1217#L12 assume ~i <= 0;#res := 0; 1165#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1161#L14-1 [2021-10-28 09:03:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2021-10-28 09:03:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003702585] [2021-10-28 09:03:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,202 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,209 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2021-10-28 09:03:47,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878602612] [2021-10-28 09:03:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:03:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:03:47,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:47,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878602612] [2021-10-28 09:03:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878602612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998572648] [2021-10-28 09:03:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:47,292 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:47,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:03:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:03:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:47,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998572648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:47,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:03:47,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-10-28 09:03:47,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435226084] [2021-10-28 09:03:47,386 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:03:47,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:03:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:03:47,387 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:03:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:47,444 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2021-10-28 09:03:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:03:47,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2021-10-28 09:03:47,449 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:47,453 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2021-10-28 09:03:47,454 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2021-10-28 09:03:47,454 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2021-10-28 09:03:47,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2021-10-28 09:03:47,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:47,455 INFO L681 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-10-28 09:03:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2021-10-28 09:03:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-10-28 09:03:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 69 states have internal predecessors, (73), 35 states have call successors, (35), 19 states have call predecessors, (35), 16 states have return successors, (49), 24 states have call predecessors, (49), 30 states have call successors, (49) [2021-10-28 09:03:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2021-10-28 09:03:47,486 INFO L704 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2021-10-28 09:03:47,486 INFO L587 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2021-10-28 09:03:47,486 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:03:47,486 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2021-10-28 09:03:47,488 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 09:03:47,488 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:47,488 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:47,491 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:47,491 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:47,491 INFO L791 eck$LassoCheckResult]: Stem: 1410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1404#L25 call main_#t~ret6 := rec2(main_~x~0);< 1426#rec2ENTRY ~j := #in~j; 1472#L18 assume !(~j <= 0); 1412#L20 call #t~ret3 := rec1(~j - 1);< 1471#rec1ENTRY ~i := #in~i; 1470#L12 assume !(~i <= 0); 1438#L14 call #t~ret0 := rec1(~i - 2);< 1468#rec1ENTRY ~i := #in~i; 1448#L12 assume ~i <= 0;#res := 0; 1437#rec1FINAL assume true; 1439#rec1EXIT >#27#return; 1431#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1432#rec1ENTRY ~i := #in~i; 1491#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1485#rec1EXIT >#29#return; 1427#L14-2 call #t~ret2 := rec1(#t~ret1);< 1428#rec1ENTRY ~i := #in~i; 1495#L12 assume ~i <= 0;#res := 0; 1494#rec1FINAL assume true; 1493#rec1EXIT >#31#return; 1411#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1414#rec1FINAL assume true; 1465#rec1EXIT >#33#return; 1403#L20-1 [2021-10-28 09:03:47,492 INFO L793 eck$LassoCheckResult]: Loop: 1403#L20-1 call #t~ret4 := rec2(#t~ret3);< 1407#rec2ENTRY ~j := #in~j; 1444#L18 assume !(~j <= 0); 1446#L20 call #t~ret3 := rec1(~j - 1);< 1451#rec1ENTRY ~i := #in~i; 1492#L12 assume !(~i <= 0); 1459#L14 call #t~ret0 := rec1(~i - 2);< 1451#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1490#rec1FINAL assume true; 1488#rec1EXIT >#27#return; 1486#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1432#rec1ENTRY ~i := #in~i; 1491#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1485#rec1EXIT >#29#return; 1487#L14-2 call #t~ret2 := rec1(#t~ret1);< 1428#rec1ENTRY ~i := #in~i; 1495#L12 assume ~i <= 0;#res := 0; 1494#rec1FINAL assume true; 1493#rec1EXIT >#31#return; 1464#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1479#rec1FINAL assume true; 1457#rec1EXIT >#33#return; 1403#L20-1 [2021-10-28 09:03:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2021-10-28 09:03:47,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967926169] [2021-10-28 09:03:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,515 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,534 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,534 INFO L85 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2021-10-28 09:03:47,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535919640] [2021-10-28 09:03:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,544 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:47,554 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2021-10-28 09:03:47,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124647827] [2021-10-28 09:03:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:03:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:03:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:47,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:03:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:03:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-28 09:03:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:03:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:03:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:03:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-28 09:03:47,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:47,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124647827] [2021-10-28 09:03:47,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124647827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:47,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234975792] [2021-10-28 09:03:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:47,832 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:03:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:03:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-28 09:03:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234975792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:48,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-28 09:03:48,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124493657] [2021-10-28 09:03:48,429 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:48,429 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:48,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:48,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:48,430 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:48,430 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:48,430 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:48,430 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:48,430 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-10-28 09:03:48,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:48,430 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:48,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:48,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:48,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:48,476 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:48,476 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:48,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:48,478 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:48,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 09:03:48,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:48,479 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:48,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:48,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:48,513 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:48,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 09:03:48,515 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:48,515 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:52,550 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:03:52,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:52,557 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:52,557 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:52,557 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:52,557 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:52,557 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:03:52,557 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:52,557 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:52,557 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:52,557 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-10-28 09:03:52,557 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:52,557 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:52,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:52,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:52,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:52,598 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:52,598 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:03:52,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:52,600 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 09:03:52,602 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 [2021-10-28 09:03:52,609 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:52,610 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:52,610 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:52,610 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:52,610 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:52,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:52,610 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:52,611 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:52,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-10-28 09:03:52,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:52,633 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 09:03:52,634 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:03:52,641 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:52,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:52,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:52,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:52,642 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:52,642 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:52,642 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:52,643 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:52,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-10-28 09:03:52,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:52,688 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 09:03:52,691 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 [2021-10-28 09:03:52,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:52,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:52,700 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:52,700 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:52,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:52,704 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:52,704 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:52,715 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:03:52,719 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:03:52,719 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:03:52,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:52,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:52,722 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:52,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-28 09:03:52,725 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:03:52,725 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:03:52,725 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:03:52,725 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2021-10-28 09:03:52,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-10-28 09:03:52,746 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:03:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:52,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:03:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:53,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:03:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 09:03:53,605 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-28 09:03:53,606 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:03:54,002 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Result 584 states and 903 transitions. Complement of second has 45 states. [2021-10-28 09:03:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-28 09:03:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:03:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-28 09:03:54,004 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2021-10-28 09:03:54,005 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:54,005 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2021-10-28 09:03:54,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:54,006 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2021-10-28 09:03:54,007 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:54,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2021-10-28 09:03:54,020 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-28 09:03:54,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2021-10-28 09:03:54,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2021-10-28 09:03:54,033 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-10-28 09:03:54,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2021-10-28 09:03:54,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:54,033 INFO L681 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2021-10-28 09:03:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2021-10-28 09:03:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2021-10-28 09:03:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 202 states have (on average 1.1435643564356435) internal successors, (231), 225 states have internal predecessors, (231), 125 states have call successors, (129), 57 states have call predecessors, (129), 56 states have return successors, (174), 100 states have call predecessors, (174), 116 states have call successors, (174) [2021-10-28 09:03:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2021-10-28 09:03:54,068 INFO L704 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2021-10-28 09:03:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:03:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:03:54,069 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-28 09:03:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:54,268 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2021-10-28 09:03:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:03:54,269 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2021-10-28 09:03:54,285 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-28 09:03:54,295 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2021-10-28 09:03:54,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2021-10-28 09:03:54,298 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2021-10-28 09:03:54,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2021-10-28 09:03:54,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:54,308 INFO L681 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2021-10-28 09:03:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2021-10-28 09:03:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2021-10-28 09:03:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 168 states have (on average 1.1011904761904763) internal successors, (185), 182 states have internal predecessors, (185), 100 states have call successors, (102), 49 states have call predecessors, (102), 46 states have return successors, (128), 82 states have call predecessors, (128), 84 states have call successors, (128) [2021-10-28 09:03:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2021-10-28 09:03:54,338 INFO L704 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2021-10-28 09:03:54,338 INFO L587 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2021-10-28 09:03:54,338 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:03:54,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2021-10-28 09:03:54,346 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-28 09:03:54,346 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:54,346 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:54,347 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:54,348 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:03:54,348 INFO L791 eck$LassoCheckResult]: Stem: 3392#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3390#L25 call main_#t~ret6 := rec2(main_~x~0);< 3417#rec2ENTRY ~j := #in~j; 3486#L18 assume !(~j <= 0); 3483#L20 call #t~ret3 := rec1(~j - 1);< 3484#rec1ENTRY ~i := #in~i; 3500#L12 assume !(~i <= 0); 3496#L14 call #t~ret0 := rec1(~i - 2);< 3499#rec1ENTRY ~i := #in~i; 3507#L12 assume ~i <= 0;#res := 0; 3545#rec1FINAL assume true; 3543#rec1EXIT >#27#return; 3537#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3538#rec1ENTRY ~i := #in~i; 3541#L12 assume ~i <= 0;#res := 0; 3540#rec1FINAL assume true; 3536#rec1EXIT >#29#return; 3530#L14-2 call #t~ret2 := rec1(#t~ret1);< 3534#rec1ENTRY ~i := #in~i; 3539#L12 assume ~i <= 0;#res := 0; 3535#rec1FINAL assume true; 3533#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3548#rec1FINAL assume true; 3547#rec1EXIT >#33#return; 3446#L20-1 call #t~ret4 := rec2(#t~ret3);< 3445#rec2ENTRY ~j := #in~j; 3447#L18 assume !(~j <= 0); 3553#L20 call #t~ret3 := rec1(~j - 1);< 3469#rec1ENTRY ~i := #in~i; 3578#L12 assume !(~i <= 0); 3398#L14 call #t~ret0 := rec1(~i - 2);< 3433#rec1ENTRY [2021-10-28 09:03:54,348 INFO L793 eck$LassoCheckResult]: Loop: 3433#rec1ENTRY ~i := #in~i; 3569#L12 assume !(~i <= 0); 3397#L14 call #t~ret0 := rec1(~i - 2);< 3433#rec1ENTRY [2021-10-28 09:03:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2021-10-28 09:03:54,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:54,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80338245] [2021-10-28 09:03:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:54,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:54,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:03:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:03:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:54,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:03:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:03:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 09:03:54,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:54,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80338245] [2021-10-28 09:03:54,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80338245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:54,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488439479] [2021-10-28 09:03:54,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:03:54,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:54,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:54,472 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:54,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:03:54,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:03:54,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:03:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:03:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 09:03:54,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488439479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:54,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:54,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-28 09:03:54,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951305980] [2021-10-28 09:03:54,751 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:03:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2021-10-28 09:03:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:54,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11971634] [2021-10-28 09:03:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:54,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:54,758 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:54,763 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:54,795 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:54,795 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:54,795 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:54,795 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:54,795 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:54,796 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:54,796 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:54,796 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:54,796 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-10-28 09:03:54,796 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:54,796 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:54,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,807 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:54,832 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:54,832 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:54,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:54,833 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:54,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:54,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:54,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-28 09:03:54,864 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:03:54,864 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:03:54,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:54,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:54,904 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:54,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:54,906 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:54,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-28 09:03:54,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:54,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:54,979 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:54,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:54,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:54,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-28 09:03:55,040 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:03:55,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:55,047 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:55,047 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:55,047 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:55,047 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:55,047 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:03:55,047 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:55,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:55,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:55,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-10-28 09:03:55,048 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:55,048 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:55,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:55,088 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:55,089 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:03:55,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:55,090 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:55,096 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 [2021-10-28 09:03:55,106 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:55,106 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:55,106 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:55,106 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:55,106 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:55,107 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:55,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:55,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-28 09:03:55,123 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:03:55,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2021-10-28 09:03:55,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:55,145 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:55,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-28 09:03:55,146 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 [2021-10-28 09:03:55,153 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:03:55,153 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:03:55,154 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:03:55,154 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:03:55,154 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:03:55,154 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:03:55,154 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:03:55,157 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:03:55,158 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:03:55,158 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:03:55,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:55,160 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-28 09:03:55,164 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:03:55,164 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:03:55,164 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:03:55,164 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-28 09:03:55,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-10-28 09:03:55,185 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:03:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:03:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:03:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:55,762 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 09:03:55,762 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:55,847 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 348 states and 455 transitions. Complement of second has 14 states. [2021-10-28 09:03:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 09:03:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-10-28 09:03:55,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-28 09:03:55,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:55,849 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:03:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:03:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:56,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:03:56,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:56,381 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 09:03:56,382 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:56,449 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 348 states and 455 transitions. Complement of second has 14 states. [2021-10-28 09:03:56,450 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 [2021-10-28 09:03:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-10-28 09:03:56,451 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-28 09:03:56,451 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:56,451 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:03:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:03:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:03:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:56,976 INFO L152 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 [2021-10-28 09:03:56,976 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:57,073 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 485 states and 616 transitions. Complement of second has 16 states. [2021-10-28 09:03:57,074 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 [2021-10-28 09:03:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:03:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-10-28 09:03:57,074 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-28 09:03:57,075 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:57,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2021-10-28 09:03:57,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:57,076 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2021-10-28 09:03:57,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:03:57,077 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2021-10-28 09:03:57,086 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2021-10-28 09:03:57,095 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2021-10-28 09:03:57,096 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2021-10-28 09:03:57,096 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2021-10-28 09:03:57,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2021-10-28 09:03:57,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:57,097 INFO L681 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2021-10-28 09:03:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2021-10-28 09:03:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2021-10-28 09:03:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 211 states have internal predecessors, (220), 102 states have call successors, (104), 57 states have call predecessors, (104), 54 states have return successors, (132), 82 states have call predecessors, (132), 86 states have call successors, (132) [2021-10-28 09:03:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2021-10-28 09:03:57,116 INFO L704 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2021-10-28 09:03:57,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:03:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:03:57,118 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 09:03:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:57,213 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2021-10-28 09:03:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:03:57,214 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2021-10-28 09:03:57,222 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-28 09:03:57,225 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2021-10-28 09:03:57,225 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2021-10-28 09:03:57,226 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2021-10-28 09:03:57,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2021-10-28 09:03:57,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:03:57,226 INFO L681 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-10-28 09:03:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2021-10-28 09:03:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-10-28 09:03:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2021-10-28 09:03:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2021-10-28 09:03:57,233 INFO L704 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-10-28 09:03:57,233 INFO L587 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-10-28 09:03:57,233 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:03:57,233 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2021-10-28 09:03:57,234 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-28 09:03:57,235 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:03:57,235 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:03:57,235 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:57,235 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:03:57,236 INFO L791 eck$LassoCheckResult]: Stem: 6151#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6150#L25 call main_#t~ret6 := rec2(main_~x~0);< 6161#rec2ENTRY ~j := #in~j; 6208#L18 assume !(~j <= 0); 6205#L20 call #t~ret3 := rec1(~j - 1);< 6207#rec1ENTRY ~i := #in~i; 6206#L12 assume !(~i <= 0); 6180#L14 call #t~ret0 := rec1(~i - 2);< 6186#rec1ENTRY ~i := #in~i; 6183#L12 assume !(~i <= 0); 6179#L14 [2021-10-28 09:03:57,236 INFO L793 eck$LassoCheckResult]: Loop: 6179#L14 call #t~ret0 := rec1(~i - 2);< 6181#rec1ENTRY ~i := #in~i; 6183#L12 assume !(~i <= 0); 6179#L14 [2021-10-28 09:03:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:57,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2021-10-28 09:03:57,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:57,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032207834] [2021-10-28 09:03:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:57,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,245 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,250 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2021-10-28 09:03:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:57,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855746735] [2021-10-28 09:03:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:57,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,258 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,261 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2021-10-28 09:03:57,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:57,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996296663] [2021-10-28 09:03:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:57,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,271 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:03:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:03:57,276 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:03:57,316 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:03:57,316 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:03:57,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:03:57,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:03:57,317 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:03:57,317 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:57,317 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:03:57,317 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:03:57,317 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-10-28 09:03:57,317 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:03:57,317 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:03:57,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:57,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:57,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:57,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:57,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:03:57,363 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:03:57,364 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:03:57,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:57,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:57,365 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:57,374 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:03:57,374 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:57,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-28 09:03:57,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:57,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:03:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:57,444 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:57,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:03:57,446 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:03:57,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-28 09:04:04,832 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:04:04,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:04,835 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:04:04,836 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:04:04,836 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:04:04,836 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:04:04,836 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:04:04,836 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:04,836 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:04:04,836 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:04:04,836 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-10-28 09:04:04,836 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:04:04,836 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:04:04,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:04,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:04,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:04,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:04,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:04,886 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:04:04,887 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:04:04,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:04,888 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:04,901 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 [2021-10-28 09:04:04,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:04:04,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:04:04,911 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:04:04,911 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:04:04,911 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:04:04,913 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:04:04,913 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:04:04,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-28 09:04:04,923 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:04:04,935 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:04:04,935 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:04:04,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:04,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:04,940 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:04,942 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:04:04,943 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:04:04,943 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:04:04,943 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2021-10-28 09:04:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-28 09:04:04,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:04,969 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:04:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:04:05,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:04:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:05,069 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 09:04:05,069 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 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) [2021-10-28 09:04:05,105 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. 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 100 states and 124 transitions. Complement of second has 11 states. [2021-10-28 09:04:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 09:04:05,108 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) [2021-10-28 09:04:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-28 09:04:05,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2021-10-28 09:04:05,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:05,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2021-10-28 09:04:05,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:05,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:04:05,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:05,110 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2021-10-28 09:04:05,112 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-28 09:04:05,114 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2021-10-28 09:04:05,114 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2021-10-28 09:04:05,114 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2021-10-28 09:04:05,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2021-10-28 09:04:05,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:04:05,115 INFO L681 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2021-10-28 09:04:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2021-10-28 09:04:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-28 09:04:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 58 states have internal predecessors, (60), 23 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (30), 17 states have call predecessors, (30), 21 states have call successors, (30) [2021-10-28 09:04:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-10-28 09:04:05,120 INFO L704 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-10-28 09:04:05,121 INFO L587 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-10-28 09:04:05,121 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:04:05,121 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2021-10-28 09:04:05,122 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-28 09:04:05,122 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:04:05,122 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:04:05,124 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:05,124 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:04:05,125 INFO L791 eck$LassoCheckResult]: Stem: 6407#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6418#rec2ENTRY ~j := #in~j; 6426#L18 assume !(~j <= 0); 6427#L20 call #t~ret3 := rec1(~j - 1);< 6445#rec1ENTRY ~i := #in~i; 6444#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6430#rec1ENTRY ~i := #in~i; 6491#L12 assume !(~i <= 0); 6414#L14 call #t~ret0 := rec1(~i - 2);< 6434#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6494#rec1FINAL assume true; 6492#rec1EXIT >#27#return; 6424#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6480#rec1ENTRY ~i := #in~i; 6484#L12 assume ~i <= 0;#res := 0; 6482#rec1FINAL assume true; 6479#rec1EXIT >#29#return; 6419#L14-2 call #t~ret2 := rec1(#t~ret1);< 6420#rec1ENTRY ~i := #in~i; 6476#L12 assume ~i <= 0;#res := 0; 6475#rec1FINAL assume true; 6473#rec1EXIT >#31#return; 6408#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6417#rec1FINAL assume true; 6442#rec1EXIT >#27#return; 6409#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6421#rec1ENTRY [2021-10-28 09:04:05,125 INFO L793 eck$LassoCheckResult]: Loop: 6421#rec1ENTRY ~i := #in~i; 6490#L12 assume !(~i <= 0); 6413#L14 call #t~ret0 := rec1(~i - 2);< 6440#rec1ENTRY ~i := #in~i; 6429#L12 assume !(~i <= 0); 6416#L14 call #t~ret0 := rec1(~i - 2);< 6431#rec1ENTRY ~i := #in~i; 6428#L12 assume ~i <= 0;#res := 0; 6422#rec1FINAL assume true; 6423#rec1EXIT >#27#return; 6424#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6480#rec1ENTRY ~i := #in~i; 6484#L12 assume ~i <= 0;#res := 0; 6482#rec1FINAL assume true; 6479#rec1EXIT >#29#return; 6419#L14-2 call #t~ret2 := rec1(#t~ret1);< 6420#rec1ENTRY ~i := #in~i; 6476#L12 assume ~i <= 0;#res := 0; 6475#rec1FINAL assume true; 6473#rec1EXIT >#31#return; 6408#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6417#rec1FINAL assume true; 6442#rec1EXIT >#27#return; 6410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6421#rec1ENTRY [2021-10-28 09:04:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2021-10-28 09:04:05,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:05,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842426963] [2021-10-28 09:04:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:05,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:05,138 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:04:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:05,146 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:04:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2021-10-28 09:04:05,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:05,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861295045] [2021-10-28 09:04:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:05,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:05,157 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:04:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:05,164 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:04:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2021-10-28 09:04:05,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:05,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877165703] [2021-10-28 09:04:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:05,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:04:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:04:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:04:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:04:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 09:04:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:04:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 09:04:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:04:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-10-28 09:04:05,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:05,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877165703] [2021-10-28 09:04:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877165703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:05,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365682961] [2021-10-28 09:04:05,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:04:05,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:05,345 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:05,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 09:04:05,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:04:05,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:04:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:04:05,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365682961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:05,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-28 09:04:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210563207] [2021-10-28 09:04:06,048 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:04:06,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:04:06,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:04:06,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:04:06,049 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:04:06,049 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,049 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:04:06,049 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:04:06,049 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-10-28 09:04:06,049 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:04:06,049 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:04:06,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,099 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:04:06,099 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:04:06,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,101 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:04:06,118 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:04:06,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-28 09:04:06,142 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:04:06,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:04:06,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:06,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,181 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:04:06,185 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:04:06,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-28 09:04:06,195 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:04:06,196 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:04:06,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:06,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,218 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-28 09:04:06,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:04:06,221 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:04:06,230 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:04:06,230 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:04:06,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-10-28 09:04:06,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,252 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-28 09:04:06,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:04:06,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:04:06,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-10-28 09:04:06,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,283 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-28 09:04:06,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:04:06,284 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:04:06,294 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:04:06,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:06,315 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:04:06,315 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:04:06,315 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:04:06,315 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:04:06,315 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:04:06,315 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,315 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:04:06,315 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:04:06,316 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-10-28 09:04:06,316 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:04:06,316 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:04:06,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:04:06,370 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:04:06,370 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:04:06,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,372 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-28 09:04:06,373 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 [2021-10-28 09:04:06,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:04:06,380 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:04:06,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:04:06,381 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:04:06,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:04:06,381 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:04:06,382 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:04:06,406 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:04:06,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-10-28 09:04:06,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,438 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-28 09:04:06,440 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 [2021-10-28 09:04:06,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:04:06,447 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:04:06,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:04:06,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:04:06,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:04:06,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:04:06,448 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:04:06,462 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:04:06,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:06,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,502 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,508 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 [2021-10-28 09:04:06,518 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:04:06,518 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:04:06,518 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:04:06,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:04:06,519 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:04:06,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:04:06,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:04:06,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-28 09:04:06,543 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:04:06,547 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:04:06,547 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:04:06,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:04:06,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:06,549 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:06,551 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:04:06,551 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:04:06,551 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:04:06,551 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-28 09:04:06,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-28 09:04:06,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-28 09:04:06,575 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:04:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:04:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:06,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:04:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 09:04:07,372 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-28 09:04:07,372 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:07,444 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 100 states and 122 transitions. Complement of second has 7 states. [2021-10-28 09:04:07,445 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 [2021-10-28 09:04:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-28 09:04:07,446 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-28 09:04:07,446 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:07,446 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:04:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:04:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:04:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 09:04:08,143 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-28 09:04:08,143 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:08,213 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 100 states and 122 transitions. Complement of second has 7 states. [2021-10-28 09:04:08,213 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 [2021-10-28 09:04:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-28 09:04:08,215 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-28 09:04:08,216 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:08,216 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:04:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:08,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:04:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:04:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 09:04:09,019 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-28 09:04:09,019 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:09,308 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 257 states and 303 transitions. Complement of second has 31 states. [2021-10-28 09:04:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-28 09:04:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2021-10-28 09:04:09,309 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-28 09:04:09,310 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:09,310 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:04:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:04:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:04:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 09:04:10,070 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-28 09:04:10,071 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:10,619 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 409 states and 515 transitions. Complement of second has 80 states. [2021-10-28 09:04:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2021-10-28 09:04:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:04:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2021-10-28 09:04:10,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-28 09:04:10,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:10,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2021-10-28 09:04:10,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:10,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2021-10-28 09:04:10,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:04:10,627 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2021-10-28 09:04:10,636 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2021-10-28 09:04:10,641 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2021-10-28 09:04:10,641 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2021-10-28 09:04:10,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2021-10-28 09:04:10,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2021-10-28 09:04:10,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:04:10,642 INFO L681 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2021-10-28 09:04:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2021-10-28 09:04:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2021-10-28 09:04:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 126 states have (on average 1.126984126984127) internal successors, (142), 138 states have internal predecessors, (142), 51 states have call successors, (52), 34 states have call predecessors, (52), 39 states have return successors, (76), 43 states have call predecessors, (76), 49 states have call successors, (76) [2021-10-28 09:04:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2021-10-28 09:04:10,657 INFO L704 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2021-10-28 09:04:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:04:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:04:10,658 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 09:04:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:10,706 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-28 09:04:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:04:10,707 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2021-10-28 09:04:10,707 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:04:10,708 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-10-28 09:04:10,708 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 09:04:10,708 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 09:04:10,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 09:04:10,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:04:10,708 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:04:10,708 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:04:10,709 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:04:10,709 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:04:10,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:04:10,709 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:04:10,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 09:04:10,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:04:10 BoogieIcfgContainer [2021-10-28 09:04:10,715 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:04:10,716 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:04:10,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:04:10,717 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:04:10,717 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:41" (3/4) ... [2021-10-28 09:04:10,720 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:04:10,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:04:10,722 INFO L168 Benchmark]: Toolchain (without parser) took 29589.58 ms. Allocated memory was 88.1 MB in the beginning and 188.7 MB in the end (delta: 100.7 MB). Free memory was 54.7 MB in the beginning and 100.4 MB in the end (delta: -45.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,722 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:10,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.24 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 54.4 MB in the beginning and 105.3 MB in the end (delta: -50.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.94 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 103.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:10,724 INFO L168 Benchmark]: Boogie Preprocessor took 20.42 ms. Allocated memory is still 127.9 MB. Free memory was 103.8 MB in the beginning and 103.0 MB in the end (delta: 770.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:10,724 INFO L168 Benchmark]: RCFGBuilder took 263.20 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 94.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,725 INFO L168 Benchmark]: BuchiAutomizer took 28922.42 ms. Allocated memory was 127.9 MB in the beginning and 188.7 MB in the end (delta: 60.8 MB). Free memory was 94.9 MB in the beginning and 100.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 57.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,725 INFO L168 Benchmark]: Witness Printer took 3.93 ms. Allocated memory is still 188.7 MB. Free memory is still 100.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:10,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.24 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 54.4 MB in the beginning and 105.3 MB in the end (delta: -50.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.94 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 103.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.42 ms. Allocated memory is still 127.9 MB. Free memory was 103.8 MB in the beginning and 103.0 MB in the end (delta: 770.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 263.20 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 94.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 28922.42 ms. Allocated memory was 127.9 MB in the beginning and 188.7 MB in the end (delta: 60.8 MB). Free memory was 94.9 MB in the beginning and 100.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 57.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.93 ms. Allocated memory is still 188.7 MB. Free memory is still 100.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@29ccd64 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 28.8s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 18.8s. Construction of modules took 1.0s. Büchi inclusion checks took 8.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 325 SDslu, 551 SDs, 0 SdLazy, 1046 SolverSat, 301 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf97 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 36ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 12.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 09:04:10,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:10,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-28 09:04:11,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:11,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:11,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ea34b7-008b-47f5-8017-8ceba482b081/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...