./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC --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 ff3652fa62b489d4e6a4a85c8349c06d13bd2232 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:28:29,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:28:29,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:28:30,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:28:30,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:28:30,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:28:30,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:28:30,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:28:30,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:28:30,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:28:30,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:28:30,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:28:30,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:28:30,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:28:30,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:28:30,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:28:30,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:28:30,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:28:30,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:28:30,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:28:30,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:28:30,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:28:30,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:28:30,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:28:30,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:28:30,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:28:30,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:28:30,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:28:30,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:28:30,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:28:30,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:28:30,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:28:30,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:28:30,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:28:30,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:28:30,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:28:30,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:28:30,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:28:30,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:28:30,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:28:30,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:28:30,077 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-11 00:28:30,121 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:28:30,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:28:30,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:28:30,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:28:30,130 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:28:30,130 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-11 00:28:30,130 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-11 00:28:30,130 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-11 00:28:30,130 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-11 00:28:30,131 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-11 00:28:30,132 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-11 00:28:30,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:28:30,132 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 00:28:30,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:28:30,133 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-11 00:28:30,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:28:30,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-11 00:28:30,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:28:30,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:28:30,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:28:30,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:28:30,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:28:30,136 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-11 00:28:30,137 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_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff3652fa62b489d4e6a4a85c8349c06d13bd2232 [2021-10-11 00:28:30,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:28:30,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:28:30,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:28:30,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:28:30,501 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:28:30,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2021-10-11 00:28:30,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/data/9bfb2c8ee/902ce06d50f74a0c985df1dcaa735096/FLAG2154bd947 [2021-10-11 00:28:31,138 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:28:31,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2021-10-11 00:28:31,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/data/9bfb2c8ee/902ce06d50f74a0c985df1dcaa735096/FLAG2154bd947 [2021-10-11 00:28:31,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/data/9bfb2c8ee/902ce06d50f74a0c985df1dcaa735096 [2021-10-11 00:28:31,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:28:31,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:28:31,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:28:31,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:28:31,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:28:31,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ad9c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31, skipping insertion in model container [2021-10-11 00:28:31,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:28:31,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:28:31,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:28:31,707 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:28:31,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:28:31,745 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:28:31,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31 WrapperNode [2021-10-11 00:28:31,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:28:31,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:28:31,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:28:31,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:28:31,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:28:31,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:28:31,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:28:31,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:28:31,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... [2021-10-11 00:28:31,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:28:31,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:28:31,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:28:31,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:28:31,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:31,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:28:31,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:28:32,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:28:32,087 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 00:28:32,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:32 BoogieIcfgContainer [2021-10-11 00:28:32,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:28:32,091 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-11 00:28:32,092 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-11 00:28:32,097 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-11 00:28:32,097 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:28:32,099 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 11.10 12:28:31" (1/3) ... [2021-10-11 00:28:32,100 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@74bdbb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 11.10 12:28:32, skipping insertion in model container [2021-10-11 00:28:32,101 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:28:32,101 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:31" (2/3) ... [2021-10-11 00:28:32,101 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@74bdbb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 11.10 12:28:32, skipping insertion in model container [2021-10-11 00:28:32,101 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:28:32,102 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:32" (3/3) ... [2021-10-11 00:28:32,105 INFO L389 chiAutomizerObserver]: Analyzing ICFG PodelskiRybalchenko-TACAS2011-Fig2.c [2021-10-11 00:28:32,171 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-11 00:28:32,171 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-11 00:28:32,171 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-11 00:28:32,172 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:28:32,172 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:28:32,172 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-11 00:28:32,172 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:28:32,172 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-11 00:28:32,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2021-10-11 00:28:32,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-11 00:28:32,199 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:28:32,199 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:28:32,204 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-11 00:28:32,205 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-11 00:28:32,205 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-11 00:28:32,205 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2021-10-11 00:28:32,206 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-11 00:28:32,206 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:28:32,206 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:28:32,206 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-11 00:28:32,207 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-11 00:28:32,213 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 3#L17-2true [2021-10-11 00:28:32,214 INFO L796 eck$LassoCheckResult]: Loop: 3#L17-2true assume !!(main_~x~0 >= 0);main_~y~0 := 1; 6#L19-2true assume !(main_~y~0 < main_~x~0); 5#L19-3true main_~x~0 := main_~x~0 - 1; 3#L17-2true [2021-10-11 00:28:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-11 00:28:32,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:32,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433770694] [2021-10-11 00:28:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,335 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,355 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2021-10-11 00:28:32,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:32,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209414591] [2021-10-11 00:28:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,386 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,396 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,400 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2021-10-11 00:28:32,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:32,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790958087] [2021-10-11 00:28:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,417 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:32,422 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:32,424 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:32,489 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:32,490 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:32,490 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:32,490 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:32,491 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:28:32,491 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:32,491 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:32,491 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:32,491 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2021-10-11 00:28:32,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:32,492 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:32,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:32,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:32,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:32,709 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:32,710 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:32,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:32,797 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:32,842 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:28:32,843 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:32,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:32,883 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:32,900 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:28:32,900 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:32,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:32,938 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:32,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:28:32,992 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,054 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:28:33,056 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:33,057 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:33,057 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:33,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:33,057 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:28:33,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:33,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:33,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2021-10-11 00:28:33,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:33,058 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:33,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,186 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:33,191 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:33,204 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:33,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:33,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:28:33,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:33,209 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:33,209 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:28:33,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:28:33,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,226 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:28:33,231 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-11 00:28:33,232 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:33,240 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:28:33,240 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:28:33,241 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:28:33,242 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,277 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:28:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:28:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:33,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:28:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:33,428 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-11 00:28:33,430 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2021-10-11 00:28:33,501 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 23 states and 35 transitions. Complement of second has 7 states. [2021-10-11 00:28:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-11 00:28:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-11 00:28:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-11 00:28:33,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 3 letters. [2021-10-11 00:28:33,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:33,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 3 letters. [2021-10-11 00:28:33,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:33,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-11 00:28:33,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:33,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 35 transitions. [2021-10-11 00:28:33,518 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-11 00:28:33,523 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2021-10-11 00:28:33,524 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2021-10-11 00:28:33,525 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-10-11 00:28:33,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-10-11 00:28:33,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:28:33,526 INFO L692 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-11 00:28:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-10-11 00:28:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2021-10-11 00:28:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 00:28:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2021-10-11 00:28:33,555 INFO L715 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2021-10-11 00:28:33,555 INFO L595 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2021-10-11 00:28:33,555 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-11 00:28:33,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 9 transitions. [2021-10-11 00:28:33,557 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-11 00:28:33,558 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:28:33,558 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:28:33,558 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-11 00:28:33,558 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-10-11 00:28:33,559 INFO L794 eck$LassoCheckResult]: Stem: 74#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 70#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 72#L19-2 [2021-10-11 00:28:33,559 INFO L796 eck$LassoCheckResult]: Loop: 72#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 72#L19-2 [2021-10-11 00:28:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-11 00:28:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639817301] [2021-10-11 00:28:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,580 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2021-10-11 00:28:33,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706557234] [2021-10-11 00:28:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2021-10-11 00:28:33,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:33,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005588296] [2021-10-11 00:28:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:33,633 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:33,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:33,649 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:33,649 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:33,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:33,650 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:33,650 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:28:33,650 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,650 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:33,650 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:33,651 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2021-10-11 00:28:33,651 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:33,651 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:33,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:33,721 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:33,721 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:33,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:33,735 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:33,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:28:33,750 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:33,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:33,789 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:33,871 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:28:33,871 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,019 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:28:34,034 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:34,034 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:34,035 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:34,035 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:34,035 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:28:34,035 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,035 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:34,035 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:34,035 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2021-10-11 00:28:34,035 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:34,035 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:34,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,151 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:34,151 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,168 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:34,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:34,170 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:34,170 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:34,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:28:34,174 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-11 00:28:34,174 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-11 00:28:34,197 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,238 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:34,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:34,240 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:28:34,240 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:34,240 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:34,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:28:34,247 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:28:34,247 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:28:34,261 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:28:34,271 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-11 00:28:34,271 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,281 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:28:34,285 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:28:34,286 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:28:34,286 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-10-11 00:28:34,309 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:28:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:28:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:34,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:28:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:34,349 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-11 00:28:34,349 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5 Second operand 2 states. [2021-10-11 00:28:34,369 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 13 states and 18 transitions. Complement of second has 5 states. [2021-10-11 00:28:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-11 00:28:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-11 00:28:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-11 00:28:34,370 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2021-10-11 00:28:34,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:34,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2021-10-11 00:28:34,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:34,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-11 00:28:34,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:34,371 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 18 transitions. [2021-10-11 00:28:34,374 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-11 00:28:34,375 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 13 transitions. [2021-10-11 00:28:34,375 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2021-10-11 00:28:34,375 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2021-10-11 00:28:34,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2021-10-11 00:28:34,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:28:34,376 INFO L692 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2021-10-11 00:28:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2021-10-11 00:28:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2021-10-11 00:28:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 00:28:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-10-11 00:28:34,377 INFO L715 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-10-11 00:28:34,377 INFO L595 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-10-11 00:28:34,377 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-11 00:28:34,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-10-11 00:28:34,379 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-11 00:28:34,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:28:34,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:28:34,380 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-10-11 00:28:34,380 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-10-11 00:28:34,380 INFO L794 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 118#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 119#L19-2 assume !(main_~y~0 < main_~x~0); 123#L19-3 main_~x~0 := main_~x~0 - 1; 120#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 121#L19-2 [2021-10-11 00:28:34,380 INFO L796 eck$LassoCheckResult]: Loop: 121#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 121#L19-2 [2021-10-11 00:28:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:34,381 INFO L82 PathProgramCache]: Analyzing trace with hash 29867642, now seen corresponding path program 2 times [2021-10-11 00:28:34,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:34,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230273590] [2021-10-11 00:28:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:34,401 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:34,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:34,407 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2021-10-11 00:28:34,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:34,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127614582] [2021-10-11 00:28:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:34,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:28:34,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:28:34,424 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:28:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash 925896921, now seen corresponding path program 1 times [2021-10-11 00:28:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:34,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788397868] [2021-10-11 00:28:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:34,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788397868] [2021-10-11 00:28:34,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85725210] [2021-10-11 00:28:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 00:28:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:28:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:34,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:34,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-11 00:28:34,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55446224] [2021-10-11 00:28:34,680 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:34,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:34,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:34,681 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:34,681 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:28:34,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,682 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:34,682 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:34,682 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2021-10-11 00:28:34,682 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:34,682 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:34,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:34,749 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:34,750 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:34,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:34,760 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,774 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:28:34,774 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:34,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:34,815 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:34,830 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:28:34,830 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:34,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:28:34,870 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:34,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:28:34,921 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,142 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:28:35,147 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:28:35,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:28:35,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:28:35,147 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:28:35,147 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:28:35,147 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,147 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:28:35,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:28:35,148 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2021-10-11 00:28:35,148 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:28:35,148 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:28:35,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:35,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:35,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:28:35,263 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:28:35,268 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:35,283 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:35,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:35,285 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:35,285 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:35,285 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:28:35,291 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-11 00:28:35,293 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,305 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:35,349 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:35,351 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:35,351 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:35,351 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:35,351 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,357 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-11 00:28:35,357 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-11 00:28:35,373 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:35,414 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:28:35,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:28:35,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:28:35,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:28:35,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:28:35,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:28:35,420 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:28:35,420 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,433 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:28:35,439 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-11 00:28:35,440 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421faeff-5b28-46d8-bf49-5fc5efac7c8d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:28:35,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:28:35,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:28:35,451 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:28:35,451 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:28:35,484 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:28:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:35,525 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-11 00:28:35,525 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2021-10-11 00:28:35,541 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2021-10-11 00:28:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-11 00:28:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-11 00:28:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-11 00:28:35,542 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2021-10-11 00:28:35,543 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:35,543 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:28:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:35,581 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-11 00:28:35,581 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2021-10-11 00:28:35,593 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2021-10-11 00:28:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-11 00:28:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-11 00:28:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-11 00:28:35,595 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2021-10-11 00:28:35,595 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:35,595 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:28:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:35,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:28:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:35,631 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-11 00:28:35,631 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2021-10-11 00:28:35,645 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 9 states and 11 transitions. Complement of second has 4 states. [2021-10-11 00:28:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-11 00:28:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-11 00:28:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-10-11 00:28:35,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 1 letters. [2021-10-11 00:28:35,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:35,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2021-10-11 00:28:35,648 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:35,648 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2021-10-11 00:28:35,648 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:28:35,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2021-10-11 00:28:35,649 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:28:35,649 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2021-10-11 00:28:35,649 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-11 00:28:35,649 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-11 00:28:35,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-11 00:28:35,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-11 00:28:35,650 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:35,650 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:28:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:28:35,655 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 7 states. [2021-10-11 00:28:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:35,658 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-11 00:28:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:28:35,658 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-11 00:28:35,658 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:28:35,659 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:28:35,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-11 00:28:35,659 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-11 00:28:35,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-11 00:28:35,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-11 00:28:35,659 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:35,659 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:35,660 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:35,660 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-11 00:28:35,660 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:28:35,660 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:28:35,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-11 00:28:35,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 11.10 12:28:35 BoogieIcfgContainer [2021-10-11 00:28:35,666 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-11 00:28:35,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:28:35,667 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:28:35,667 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:28:35,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:32" (3/4) ... [2021-10-11 00:28:35,671 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:28:35,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:28:35,673 INFO L168 Benchmark]: Toolchain (without parser) took 4169.42 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 100.7 MB in the beginning and 103.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,674 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 86.0 MB. Free memory was 42.3 MB in the beginning and 42.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:35,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.39 ms. Allocated memory is still 132.1 MB. Free memory was 100.4 MB in the beginning and 110.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.05 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 108.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:35,676 INFO L168 Benchmark]: Boogie Preprocessor took 20.89 ms. Allocated memory is still 132.1 MB. Free memory was 108.8 MB in the beginning and 108.0 MB in the end (delta: 799.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,676 INFO L168 Benchmark]: RCFGBuilder took 282.35 ms. Allocated memory is still 132.1 MB. Free memory was 108.0 MB in the beginning and 99.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,677 INFO L168 Benchmark]: BuchiAutomizer took 3574.71 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 99.6 MB in the beginning and 104.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,678 INFO L168 Benchmark]: Witness Printer took 4.42 ms. Allocated memory is still 159.4 MB. Free memory was 104.8 MB in the beginning and 103.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:35,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 86.0 MB. Free memory was 42.3 MB in the beginning and 42.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.39 ms. Allocated memory is still 132.1 MB. Free memory was 100.4 MB in the beginning and 110.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.05 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 108.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.89 ms. Allocated memory is still 132.1 MB. Free memory was 108.8 MB in the beginning and 108.0 MB in the end (delta: 799.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 282.35 ms. Allocated memory is still 132.1 MB. Free memory was 108.0 MB in the beginning and 99.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3574.71 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 99.6 MB in the beginning and 104.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.42 ms. Allocated memory is still 159.4 MB. Free memory was 104.8 MB in the beginning and 103.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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 4 terminating modules (1 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * y + x and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 6 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 21 SDslu, 6 SDs, 0 SdLazy, 39 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax204 hnf100 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf111 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 46ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...