./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/4NestedWith3Variables-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/4NestedWith3Variables-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b39ec4b52f8da315ff57d8e97152c727a55203720ed4bc216d0daa6b94e35d48 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:44:44,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:44:44,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:44:44,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:44:44,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:44:44,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:44:44,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:44:44,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:44:44,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:44:44,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:44:44,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:44:44,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:44:44,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:44:44,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:44:44,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:44:44,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:44:44,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:44:44,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:44:44,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:44:44,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:44:44,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:44:44,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:44:44,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:44:44,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:44:44,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:44:44,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:44:44,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:44:44,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:44:44,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:44:44,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:44:44,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:44:44,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:44:44,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:44:44,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:44:44,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:44:44,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:44:44,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:44:44,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:44:44,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:44:44,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:44:44,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:44:44,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-22 19:44:44,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:44:44,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:44:44,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:44:44,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:44:44,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:44:44,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:44:44,593 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:44:44,593 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-22 19:44:44,593 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-22 19:44:44,594 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-22 19:44:44,594 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-22 19:44:44,594 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-22 19:44:44,595 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-22 19:44:44,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:44:44,595 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:44:44,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:44:44,596 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-22 19:44:44,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:44:44,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-22 19:44:44,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:44:44,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:44:44,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:44:44,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:44:44,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:44:44,599 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-22 19:44:44,599 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b39ec4b52f8da315ff57d8e97152c727a55203720ed4bc216d0daa6b94e35d48 [2021-12-22 19:44:44,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:44:44,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:44:44,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:44:44,845 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:44:44,845 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:44:44,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/4NestedWith3Variables-1.c [2021-12-22 19:44:44,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4bc3930/801c02935f444c828a62e55e3bd76d35/FLAG0183e18a5 [2021-12-22 19:44:45,296 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:44:45,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/4NestedWith3Variables-1.c [2021-12-22 19:44:45,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4bc3930/801c02935f444c828a62e55e3bd76d35/FLAG0183e18a5 [2021-12-22 19:44:45,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4bc3930/801c02935f444c828a62e55e3bd76d35 [2021-12-22 19:44:45,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:44:45,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:44:45,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:44:45,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:44:45,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:44:45,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3c740f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45, skipping insertion in model container [2021-12-22 19:44:45,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:44:45,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:44:45,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:44:45,877 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:44:45,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:44:45,903 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:44:45,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45 WrapperNode [2021-12-22 19:44:45,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:44:45,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:44:45,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:44:45,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:44:45,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,934 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2021-12-22 19:44:45,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:44:45,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:44:45,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:44:45,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:44:45,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:44:45,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:44:45,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:44:45,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:44:45,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (1/1) ... [2021-12-22 19:44:45,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:44:45,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:44:46,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-22 19:44:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:44:46,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:44:46,088 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:44:46,090 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:44:46,163 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:44:46,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:44:46,170 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 19:44:46,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:46 BoogieIcfgContainer [2021-12-22 19:44:46,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:44:46,173 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-22 19:44:46,173 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-22 19:44:46,175 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-22 19:44:46,176 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:44:46,176 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.12 07:44:45" (1/3) ... [2021-12-22 19:44:46,177 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6dd3467b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:44:46, skipping insertion in model container [2021-12-22 19:44:46,177 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:44:46,177 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:45" (2/3) ... [2021-12-22 19:44:46,178 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6dd3467b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:44:46, skipping insertion in model container [2021-12-22 19:44:46,178 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:44:46,178 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:46" (3/3) ... [2021-12-22 19:44:46,179 INFO L388 chiAutomizerObserver]: Analyzing ICFG 4NestedWith3Variables-1.c [2021-12-22 19:44:46,217 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-22 19:44:46,218 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-22 19:44:46,218 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-22 19:44:46,218 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-22 19:44:46,218 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-22 19:44:46,219 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-22 19:44:46,219 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-22 19:44:46,219 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-22 19:44:46,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:44:46,250 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:44:46,250 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:44:46,250 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:44:46,254 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-22 19:44:46,254 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-12-22 19:44:46,254 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-22 19:44:46,254 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:44:46,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:44:46,255 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:44:46,256 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:44:46,256 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-22 19:44:46,256 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-12-22 19:44:46,260 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~a~0#1, main_~b~0#1, main_~q~0#1, main_~olda~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~q~0#1;havoc main_~olda~0#1;main_~q~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~a~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 7#L23true assume !!(-524287 <= main_~q~0#1 && main_~q~0#1 <= 524287); 10#L24true assume !!(-524287 <= main_~a~0#1 && main_~a~0#1 <= 524287); 6#L25true assume !!(-524287 <= main_~b~0#1 && main_~b~0#1 <= 524287); 5#L26-2true [2021-12-22 19:44:46,261 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-2true assume !!(main_~q~0#1 > 0);main_~q~0#1 := main_~q~0#1 + main_~a~0#1 - 1;main_~olda~0#1 := main_~a~0#1;main_~a~0#1 := 3 * main_~olda~0#1 - 4 * main_~b~0#1;main_~b~0#1 := 4 * main_~olda~0#1 + 3 * main_~b~0#1; 5#L26-2true [2021-12-22 19:44:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:44:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash 28695849, now seen corresponding path program 1 times [2021-12-22 19:44:46,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:44:46,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183481670] [2021-12-22 19:44:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:44:46,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:44:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,355 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:44:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,399 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:44:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:44:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash 57, now seen corresponding path program 1 times [2021-12-22 19:44:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:44:46,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966583444] [2021-12-22 19:44:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:44:46,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:44:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,416 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:44:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,424 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:44:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:44:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 889571345, now seen corresponding path program 1 times [2021-12-22 19:44:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:44:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059129560] [2021-12-22 19:44:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:44:46,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:44:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,447 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:44:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:44:46,466 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:44:46,588 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:44:46,603 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:44:46,604 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:44:46,604 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:44:46,604 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:44:46,604 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:46,605 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:44:46,605 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:44:46,605 INFO L133 ssoRankerPreferences]: Filename of dumped script: 4NestedWith3Variables-1.c_Iteration1_Loop [2021-12-22 19:44:46,605 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:44:46,605 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:44:46,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:44:46,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:44:46,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:44:46,731 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:44:46,748 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:44:46,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:44:46,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:44:46,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:44:46,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:44:46,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-22 19:44:46,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:44:46,795 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: [] [2021-12-22 19:44:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:44:46,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:44:46,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:44:46,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-22 19:44:46,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:44:46,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:44:46,850 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:44:46,850 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: [] [2021-12-22 19:44:46,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:44:46,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:44:46,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:44:46,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-22 19:44:46,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:44:46,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:44:46,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:44:46,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:44:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:44:46,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:44:46,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:44:46,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:44:46,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process