./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/a.10.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 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-restricted-15/a.10.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 8289502743fb6ee3e9387ca4db850e54d4ebfec650d98779b674c3406acaae1b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:22:43,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:22:43,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:22:43,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:22:43,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:22:43,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:22:43,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:22:43,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:22:43,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:22:43,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:22:43,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:22:43,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:22:43,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:22:43,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:22:43,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:22:43,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:22:43,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:22:43,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:22:43,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:22:43,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:22:43,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:22:43,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:22:43,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:22:43,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:22:43,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:22:43,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:22:43,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:22:43,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:22:43,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:22:43,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:22:43,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:22:43,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:22:43,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:22:43,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:22:43,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:22:43,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:22:43,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:22:43,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:22:43,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:22:43,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:22:43,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:22:43,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-16 09:22:43,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:22:43,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:22:43,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:22:43,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:22:43,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:22:43,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:22:43,231 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:22:43,231 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:22:43,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:22:43,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:22:43,233 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:22:43,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:22:43,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:22:43,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:22:43,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:22:43,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:22:43,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:22:43,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:22:43,234 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:22:43,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8289502743fb6ee3e9387ca4db850e54d4ebfec650d98779b674c3406acaae1b [2021-12-16 09:22:43,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:22:43,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:22:43,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:22:43,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:22:43,462 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:22:43,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/a.10.c [2021-12-16 09:22:43,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71472052e/a248bfa087304e95a863553c0f0f121e/FLAG8a1013f92 [2021-12-16 09:22:43,855 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:22:43,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/a.10.c [2021-12-16 09:22:43,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71472052e/a248bfa087304e95a863553c0f0f121e/FLAG8a1013f92 [2021-12-16 09:22:43,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71472052e/a248bfa087304e95a863553c0f0f121e [2021-12-16 09:22:43,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:22:43,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:22:43,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:22:43,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:22:43,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:22:43,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:22:43" (1/1) ... [2021-12-16 09:22:43,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47395bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:43, skipping insertion in model container [2021-12-16 09:22:43,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:22:43" (1/1) ... [2021-12-16 09:22:43,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:22:43,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:22:43,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:22:44,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:22:44,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:22:44,021 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:22:44,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44 WrapperNode [2021-12-16 09:22:44,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:22:44,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:22:44,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:22:44,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:22:44,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,045 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-16 09:22:44,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:22:44,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:22:44,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:22:44,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:22:44,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:22:44,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:22:44,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:22:44,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:22:44,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (1/1) ... [2021-12-16 09:22:44,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:44,111 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) [2021-12-16 09:22:44,117 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 [2021-12-16 09:22:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:22:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:22:44,194 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:22:44,195 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:22:44,259 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:22:44,264 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:22:44,264 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 09:22:44,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:44 BoogieIcfgContainer [2021-12-16 09:22:44,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:22:44,268 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:22:44,268 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:22:44,271 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:22:44,271 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:44,272 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:22:43" (1/3) ... [2021-12-16 09:22:44,272 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@403ceccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:22:44, skipping insertion in model container [2021-12-16 09:22:44,272 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:44,273 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:44" (2/3) ... [2021-12-16 09:22:44,273 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@403ceccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:22:44, skipping insertion in model container [2021-12-16 09:22:44,273 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:44,273 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:44" (3/3) ... [2021-12-16 09:22:44,275 INFO L388 chiAutomizerObserver]: Analyzing ICFG a.10.c [2021-12-16 09:22:44,310 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:22:44,311 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:22:44,311 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:22:44,311 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:22:44,311 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:22:44,311 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:22:44,311 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:22:44,311 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:22:44,322 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-12-16 09:22:44,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:44,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:44,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:44,342 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:22:44,342 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:22:44,342 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:22:44,342 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-12-16 09:22:44,343 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:44,343 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:44,343 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:44,344 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:22:44,344 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:22:44,348 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#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_~c~0#1, main_~x~0#1, main_~y~0#1;havoc main_~c~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~c~0#1 := 0; 3#L12-2true [2021-12-16 09:22:44,349 INFO L793 eck$LassoCheckResult]: Loop: 3#L12-2true assume !!!(main_~x~0#1 == main_~y~0#1); 9#L12true assume !(main_~x~0#1 > main_~y~0#1);main_~x~0#1 := 1 + main_~x~0#1; 3#L12-2true [2021-12-16 09:22:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-16 09:22:44,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460414611] [2021-12-16 09:22:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:44,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,435 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 1 times [2021-12-16 09:22:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451828689] [2021-12-16 09:22:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,459 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,472 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2021-12-16 09:22:44,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921087346] [2021-12-16 09:22:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:44,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,483 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:44,493 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:44,575 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:44,576 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:44,576 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:44,576 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:44,576 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:22:44,576 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,576 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:44,577 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:44,577 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-12-16 09:22:44,577 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:44,577 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:44,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:44,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:44,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:44,709 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:44,709 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:22:44,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:44,716 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) [2021-12-16 09:22:44,717 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 [2021-12-16 09:22:44,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:44,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:44,740 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:22:44,740 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: [] [2021-12-16 09:22:44,756 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 [2021-12-16 09:22:44,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:44,759 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) [2021-12-16 09:22:44,759 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 [2021-12-16 09:22:44,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:44,761 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:44,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:22:44,777 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: [] [2021-12-16 09:22:44,792 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 [2021-12-16 09:22:44,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:44,794 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) [2021-12-16 09:22:44,794 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 [2021-12-16 09:22:44,798 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:44,798 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:44,829 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 [2021-12-16 09:22:44,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:44,831 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) [2021-12-16 09:22:44,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:22:44,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:44,839 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 [2021-12-16 09:22:44,960 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:22:44,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-16 09:22:44,964 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:44,964 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:44,964 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:44,964 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:44,964 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:22:44,964 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:44,964 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:44,964 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:44,964 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-12-16 09:22:44,964 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:44,964 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:44,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:44,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:44,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,047 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:45,050 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:22:45,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,052 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2021-12-16 09:22:45,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-16 09:22:45,055 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,062 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,062 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,062 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,062 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,070 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:22:45,071 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:22:45,075 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:22:45,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,094 INFO L229 MonitoredProcess]: Starting monitored process 7 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) [2021-12-16 09:22:45,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-16 09:22:45,102 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,112 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:22:45,113 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:22:45,122 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:22:45,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-16 09:22:45,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,138 INFO L229 MonitoredProcess]: Starting monitored process 8 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) [2021-12-16 09:22:45,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-16 09:22:45,141 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,147 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,147 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:22:45,148 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,148 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,148 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,149 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:22:45,149 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:22:45,158 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:22:45,175 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-16 09:22:45,175 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:22:45,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,177 INFO L229 MonitoredProcess]: Starting monitored process 9 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) [2021-12-16 09:22:45,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-16 09:22:45,179 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:22:45,179 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:22:45,179 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:22:45,179 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1, ULTIMATE.start_main_~x~0#1) = 1*ULTIMATE.start_main_~y~0#1 - 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:22:45,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-16 09:22:45,196 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:22:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:45,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:45,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 09:22:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:45,259 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 [2021-12-16 09:22:45,260 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-12-16 09:22:45,282 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Result 24 states and 31 transitions. Complement of second has 8 states. [2021-12-16 09:22:45,283 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 [2021-12-16 09:22:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-12-16 09:22:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-12-16 09:22:45,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 2 letters. Loop has 2 letters. [2021-12-16 09:22:45,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 2 letters. [2021-12-16 09:22:45,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 2 letters. Loop has 4 letters. [2021-12-16 09:22:45,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2021-12-16 09:22:45,289 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:45,291 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 8 states and 11 transitions. [2021-12-16 09:22:45,291 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-12-16 09:22:45,291 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-12-16 09:22:45,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2021-12-16 09:22:45,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:22:45,292 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:22:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2021-12-16 09:22:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-16 09:22:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-16 09:22:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-12-16 09:22:45,306 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:22:45,306 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:22:45,306 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 09:22:45,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-12-16 09:22:45,306 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:45,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:45,307 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:45,307 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:22:45,307 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:22:45,307 INFO L791 eck$LassoCheckResult]: Stem: 77#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 78#L-1 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_~c~0#1, main_~x~0#1, main_~y~0#1;havoc main_~c~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~c~0#1 := 0; 79#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 76#L12 assume main_~x~0#1 > main_~y~0#1;main_~y~0#1 := 1 + main_~y~0#1; 72#L12-2 [2021-12-16 09:22:45,307 INFO L793 eck$LassoCheckResult]: Loop: 72#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 73#L12 assume !(main_~x~0#1 > main_~y~0#1);main_~x~0#1 := 1 + main_~x~0#1; 72#L12-2 [2021-12-16 09:22:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-16 09:22:45,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559725324] [2021-12-16 09:22:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:45,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:45,311 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:45,313 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 2 times [2021-12-16 09:22:45,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:45,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728745657] [2021-12-16 09:22:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:45,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:45,316 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:45,318 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 889692235, now seen corresponding path program 1 times [2021-12-16 09:22:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331249094] [2021-12-16 09:22:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:45,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:45,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:22:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331249094] [2021-12-16 09:22:45,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331249094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:22:45,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:22:45,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 09:22:45,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005400747] [2021-12-16 09:22:45,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:22:45,365 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:45,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:45,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:45,365 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:45,365 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:22:45,365 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,365 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:45,365 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:45,365 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-12-16 09:22:45,365 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:45,365 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:45,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,398 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:45,399 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:22:45,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,399 INFO L229 MonitoredProcess]: Starting monitored process 10 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) [2021-12-16 09:22:45,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-16 09:22:45,404 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:45,404 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:45,419 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:22:45,419 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: [] [2021-12-16 09:22:45,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,438 INFO L229 MonitoredProcess]: Starting monitored process 11 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) [2021-12-16 09:22:45,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:45,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:45,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-16 09:22:45,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:22:45,463 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:22:45,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,482 INFO L229 MonitoredProcess]: Starting monitored process 12 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) [2021-12-16 09:22:45,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-16 09:22:45,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:45,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:45,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,547 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2021-12-16 09:22:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-16 09:22:45,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:22:45,549 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:45,696 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:22:45,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,702 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:45,702 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:45,702 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:45,702 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:45,702 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:22:45,702 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,702 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:45,702 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:45,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-12-16 09:22:45,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:45,703 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:45,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:45,742 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:45,742 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:22:45,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,743 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2021-12-16 09:22:45,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-16 09:22:45,746 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,754 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:22:45,754 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:22:45,769 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:22:45,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,785 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2021-12-16 09:22:45,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-16 09:22:45,788 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,794 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,794 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,794 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,794 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,796 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:22:45,796 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:22:45,811 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:22:45,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,828 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2021-12-16 09:22:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-16 09:22:45,830 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:45,836 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:45,836 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:22:45,836 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:45,836 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:45,836 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:45,837 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:22:45,837 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:22:45,843 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:22:45,846 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-16 09:22:45,846 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:22:45,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:45,847 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2021-12-16 09:22:45,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-16 09:22:45,851 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:22:45,851 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:22:45,851 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:22:45,851 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1, ULTIMATE.start_main_~y~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 1*ULTIMATE.start_main_~y~0#1 Supporting invariants [] [2021-12-16 09:22:45,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2021-12-16 09:22:45,868 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:22:45,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-12-16 09:22:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:45,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:45,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 09:22:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:45,980 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 [2021-12-16 09:22:45,981 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-16 09:22:45,990 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Result 12 states and 17 transitions. Complement of second has 5 states. [2021-12-16 09:22:45,990 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 [2021-12-16 09:22:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-16 09:22:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-12-16 09:22:45,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2021-12-16 09:22:45,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2021-12-16 09:22:45,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2021-12-16 09:22:45,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:45,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 17 transitions. [2021-12-16 09:22:45,993 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:45,993 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 17 transitions. [2021-12-16 09:22:45,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-12-16 09:22:45,994 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-16 09:22:45,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2021-12-16 09:22:45,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:22:45,994 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-12-16 09:22:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2021-12-16 09:22:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-16 09:22:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2021-12-16 09:22:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-12-16 09:22:45,995 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-12-16 09:22:45,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:22:45,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:22:45,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:22:46,000 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-16 09:22:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:22:46,014 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-12-16 09:22:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 09:22:46,016 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-12-16 09:22:46,017 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:46,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 10 states and 12 transitions. [2021-12-16 09:22:46,019 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-16 09:22:46,019 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-16 09:22:46,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 12 transitions. [2021-12-16 09:22:46,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:22:46,019 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-12-16 09:22:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 12 transitions. [2021-12-16 09:22:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 7. [2021-12-16 09:22:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-16 09:22:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2021-12-16 09:22:46,021 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-16 09:22:46,021 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-16 09:22:46,021 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-16 09:22:46,022 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2021-12-16 09:22:46,022 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:46,022 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:46,022 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:46,023 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:22:46,023 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:22:46,023 INFO L791 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 161#L-1 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_~c~0#1, main_~x~0#1, main_~y~0#1;havoc main_~c~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~c~0#1 := 0; 162#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 157#L12 [2021-12-16 09:22:46,023 INFO L793 eck$LassoCheckResult]: Loop: 157#L12 assume main_~x~0#1 > main_~y~0#1;main_~y~0#1 := 1 + main_~y~0#1; 156#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 157#L12 [2021-12-16 09:22:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-12-16 09:22:46,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766844603] [2021-12-16 09:22:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,029 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,035 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1406, now seen corresponding path program 1 times [2021-12-16 09:22:46,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455596183] [2021-12-16 09:22:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,046 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,056 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 28699749, now seen corresponding path program 2 times [2021-12-16 09:22:46,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59309698] [2021-12-16 09:22:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,063 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,066 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:46,079 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:46,079 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:46,079 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:46,079 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:46,079 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:22:46,079 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,079 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:46,079 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:46,080 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-12-16 09:22:46,080 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:46,080 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:46,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,113 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:46,113 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:22:46,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,114 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2021-12-16 09:22:46,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-16 09:22:46,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:46,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:46,138 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:22:46,138 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: [] [2021-12-16 09:22:46,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-12-16 09:22:46,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,157 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2021-12-16 09:22:46,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-16 09:22:46,159 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:46,159 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:46,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:46,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,197 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2021-12-16 09:22:46,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-16 09:22:46,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:22:46,201 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:46,485 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:22:46,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:46,491 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:46,492 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:46,492 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:46,492 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:46,492 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:22:46,492 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,492 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:46,492 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:46,492 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-12-16 09:22:46,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:46,492 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:46,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,531 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:46,531 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:22:46,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,535 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2021-12-16 09:22:46,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-16 09:22:46,538 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:46,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:46,544 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:22:46,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:46,544 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:46,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:46,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:22:46,545 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:22:46,549 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:22:46,550 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:22:46,550 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 09:22:46,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,551 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2021-12-16 09:22:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-16 09:22:46,553 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:22:46,553 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:22:46,553 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:22:46,553 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1, ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~y~0#1 + 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:22:46,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:46,570 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:22:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:46,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:22:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:46,656 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 [2021-12-16 09:22:46,656 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-16 09:22:46,671 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) Result 12 states and 14 transitions. Complement of second has 5 states. [2021-12-16 09:22:46,671 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 [2021-12-16 09:22:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-16 09:22:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-12-16 09:22:46,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-12-16 09:22:46,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:46,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:22:46,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:46,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-16 09:22:46,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:46,674 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2021-12-16 09:22:46,676 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:46,678 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 8 states and 9 transitions. [2021-12-16 09:22:46,678 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-12-16 09:22:46,678 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-12-16 09:22:46,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-12-16 09:22:46,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:22:46,691 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-16 09:22:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-12-16 09:22:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-12-16 09:22:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-12-16 09:22:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-12-16 09:22:46,693 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-16 09:22:46,693 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-16 09:22:46,693 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-16 09:22:46,693 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-12-16 09:22:46,694 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:22:46,694 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:46,694 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:46,694 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-12-16 09:22:46,694 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:22:46,694 INFO L791 eck$LassoCheckResult]: Stem: 215#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 216#L-1 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_~c~0#1, main_~x~0#1, main_~y~0#1;havoc main_~c~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~c~0#1 := 0; 211#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 212#L12 assume !(main_~x~0#1 > main_~y~0#1);main_~x~0#1 := 1 + main_~x~0#1; 213#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 214#L12 [2021-12-16 09:22:46,694 INFO L793 eck$LassoCheckResult]: Loop: 214#L12 assume main_~x~0#1 > main_~y~0#1;main_~y~0#1 := 1 + main_~y~0#1; 217#L12-2 assume !!!(main_~x~0#1 == main_~y~0#1); 214#L12 [2021-12-16 09:22:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 28699811, now seen corresponding path program 2 times [2021-12-16 09:22:46,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399715144] [2021-12-16 09:22:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,702 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,706 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1406, now seen corresponding path program 2 times [2021-12-16 09:22:46,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229418852] [2021-12-16 09:22:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,716 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:46,740 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1810715040, now seen corresponding path program 2 times [2021-12-16 09:22:46,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708768201] [2021-12-16 09:22:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:46,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:46,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:22:46,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708768201] [2021-12-16 09:22:46,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708768201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:22:46,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:22:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 09:22:46,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999186571] [2021-12-16 09:22:46,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:22:46,800 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:46,801 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:46,801 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:46,801 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:46,801 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:22:46,801 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,801 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:46,801 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:46,801 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-12-16 09:22:46,801 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:46,802 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:46,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:46,852 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:46,852 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:22:46,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,854 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2021-12-16 09:22:46,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-16 09:22:46,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:22:46,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:46,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:46,913 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2021-12-16 09:22:46,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-16 09:22:46,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:22:46,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:22:47,192 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:22:47,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-16 09:22:47,197 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:22:47,197 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:22:47,197 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:22:47,197 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:22:47,197 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:22:47,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:47,198 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:22:47,198 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:22:47,198 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-12-16 09:22:47,198 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:22:47,198 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:22:47,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:47,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:47,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:22:47,232 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:22:47,232 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:22:47,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:47,238 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2021-12-16 09:22:47,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-16 09:22:47,240 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:22:47,245 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:22:47,246 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:22:47,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:22:47,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:22:47,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:22:47,247 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:22:47,247 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:22:47,248 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:22:47,250 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-16 09:22:47,251 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:22:47,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:47,252 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2021-12-16 09:22:47,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-16 09:22:47,253 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:22:47,253 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:22:47,253 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:22:47,253 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1, ULTIMATE.start_main_~y~0#1) = 1*ULTIMATE.start_main_~x~0#1 - 1*ULTIMATE.start_main_~y~0#1 Supporting invariants [] [2021-12-16 09:22:47,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-12-16 09:22:47,269 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:22:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:47,318 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 [2021-12-16 09:22:47,319 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,321 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Result 8 states and 9 transitions. Complement of second has 3 states. [2021-12-16 09:22:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-12-16 09:22:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3 transitions. [2021-12-16 09:22:47,322 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 3 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:22:47,323 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:47,323 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:22:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:47,351 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-16 09:22:47,351 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,354 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Result 8 states and 9 transitions. Complement of second has 3 states. [2021-12-16 09:22:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-12-16 09:22:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3 transitions. [2021-12-16 09:22:47,355 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 3 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:22:47,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:47,361 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:22:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:22:47,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:22:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:22:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:22:47,390 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 2 loop predicates [2021-12-16 09:22:47,390 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,395 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Result 9 states and 10 transitions. Complement of second has 4 states. [2021-12-16 09:22:47,395 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 [2021-12-16 09:22:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-12-16 09:22:47,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:22:47,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:47,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:22:47,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:47,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 4 letters. [2021-12-16 09:22:47,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:22:47,397 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-12-16 09:22:47,397 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:22:47,397 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2021-12-16 09:22:47,397 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 09:22:47,397 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 09:22:47,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 09:22:47,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 09:22:47,398 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:22:47,398 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:22:47,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:22:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:22:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:22:47,398 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-16 09:22:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:22:47,399 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-12-16 09:22:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 09:22:47,399 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-12-16 09:22:47,399 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:22:47,399 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 09:22:47,399 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 09:22:47,399 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 09:22:47,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 09:22:47,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 09:22:47,400 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:22:47,400 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:22:47,400 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:22:47,400 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-16 09:22:47,400 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-16 09:22:47,400 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:22:47,400 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-16 09:22:47,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.12 09:22:47 BoogieIcfgContainer [2021-12-16 09:22:47,405 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-16 09:22:47,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 09:22:47,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 09:22:47,405 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 09:22:47,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:44" (3/4) ... [2021-12-16 09:22:47,407 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 09:22:47,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 09:22:47,408 INFO L158 Benchmark]: Toolchain (without parser) took 3538.46ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 57.2MB in the beginning and 83.4MB in the end (delta: -26.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:47,409 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:47,409 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.54ms. Allocated memory is still 94.4MB. Free memory was 57.1MB in the beginning and 71.0MB in the end (delta: -13.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 09:22:47,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.65ms. Allocated memory is still 94.4MB. Free memory was 71.0MB in the beginning and 69.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:47,409 INFO L158 Benchmark]: Boogie Preprocessor took 12.50ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 68.7MB in the end (delta: 949.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 09:22:47,410 INFO L158 Benchmark]: RCFGBuilder took 207.15ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 60.9MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-16 09:22:47,410 INFO L158 Benchmark]: BuchiAutomizer took 3136.84ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 60.9MB in the beginning and 83.8MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:47,410 INFO L158 Benchmark]: Witness Printer took 2.23ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 83.4MB in the end (delta: 363.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:47,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 151.54ms. Allocated memory is still 94.4MB. Free memory was 57.1MB in the beginning and 71.0MB in the end (delta: -13.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.65ms. Allocated memory is still 94.4MB. Free memory was 71.0MB in the beginning and 69.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.50ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 68.7MB in the end (delta: 949.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 207.15ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 60.9MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 3136.84ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 60.9MB in the beginning and 83.8MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.23ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 83.4MB in the end (delta: 363.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y + -1 * x and consists of 5 locations. One deterministic module has affine ranking function -1 * x + y and consists of 3 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function x + -1 * y and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics [2021-12-16 09:22:47,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-16 09:22:47,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 BüchiAutomizer plugin needed 3.0s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 8 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 37 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 29 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax185 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq171 hnf95 smp69 dnf100 smp100 tf112 neg94 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-16 09:22:47,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE