./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.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 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:58:45,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:58:45,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:58:45,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:58:45,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:58:45,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:58:45,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:58:45,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:58:45,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:58:45,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:58:45,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:58:45,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:58:45,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:58:45,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:58:45,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:58:45,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:58:45,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:58:45,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:58:45,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:58:45,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:58:45,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:58:45,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:58:45,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:58:45,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:58:45,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:58:45,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:58:45,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:58:45,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:58:45,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:58:45,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:58:45,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:58:45,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:58:45,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:58:45,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:58:45,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:58:45,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:58:45,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:58:45,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:58:45,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:58:45,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:58:45,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:58:45,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-14 22:58:45,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:58:45,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:58:45,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:58:45,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:58:45,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:58:45,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:58:45,218 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:58:45,218 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-14 22:58:45,219 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-14 22:58:45,219 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-14 22:58:45,219 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-14 22:58:45,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:58:45,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:58:45,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-14 22:58:45,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:58:45,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:58:45,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:58:45,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:58:45,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:58:45,223 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-14 22:58:45,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 [2021-12-14 22:58:45,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:58:45,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:58:45,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:58:45,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:58:45,403 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:58:45,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-12-14 22:58:45,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405330b39/5a0466ef01914d6fa72b38fd9cf475dc/FLAG11f2fbd1b [2021-12-14 22:58:45,795 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:58:45,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-12-14 22:58:45,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405330b39/5a0466ef01914d6fa72b38fd9cf475dc/FLAG11f2fbd1b [2021-12-14 22:58:46,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405330b39/5a0466ef01914d6fa72b38fd9cf475dc [2021-12-14 22:58:46,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:58:46,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:58:46,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:58:46,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:58:46,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:58:46,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561aba6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46, skipping insertion in model container [2021-12-14 22:58:46,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:58:46,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:58:46,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:58:46,382 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:58:46,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:58:46,401 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:58:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46 WrapperNode [2021-12-14 22:58:46,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:58:46,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:58:46,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:58:46,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:58:46,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,421 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-12-14 22:58:46,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:58:46,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:58:46,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:58:46,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:58:46,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:58:46,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:58:46,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:58:46,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:58:46,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (1/1) ... [2021-12-14 22:58:46,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:46,456 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) [2021-12-14 22:58:46,458 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 [2021-12-14 22:58:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:58:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:58:46,522 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:58:46,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:58:46,588 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:58:46,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:58:46,593 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 22:58:46,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:58:46 BoogieIcfgContainer [2021-12-14 22:58:46,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:58:46,596 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-14 22:58:46,596 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-14 22:58:46,598 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-14 22:58:46,598 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:58:46,598 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.12 10:58:46" (1/3) ... [2021-12-14 22:58:46,599 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40280c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 10:58:46, skipping insertion in model container [2021-12-14 22:58:46,599 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:58:46,599 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:58:46" (2/3) ... [2021-12-14 22:58:46,600 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40280c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 10:58:46, skipping insertion in model container [2021-12-14 22:58:46,600 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:58:46,600 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:58:46" (3/3) ... [2021-12-14 22:58:46,601 INFO L388 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-12-14 22:58:46,649 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-14 22:58:46,649 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-14 22:58:46,650 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-14 22:58:46,650 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-14 22:58:46,650 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-14 22:58:46,650 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-14 22:58:46,650 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-14 22:58:46,650 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-14 22:58:46,660 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:58:46,676 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:58:46,676 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:58:46,676 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:58:46,680 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-14 22:58:46,680 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:58:46,680 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-14 22:58:46,680 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:58:46,682 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:58:46,682 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:58:46,682 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:58:46,682 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-14 22:58:46,682 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:58:46,687 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_~k~0#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~j~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~n~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 11#L20true assume main_~k~0#1 >= 1;main_~i~0#1 := 0; 9#L22-2true [2021-12-14 22:58:46,687 INFO L793 eck$LassoCheckResult]: Loop: 9#L22-2true assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 6#L24-2true assume !(main_~j~0#1 <= main_~i~0#1); 10#L24-3true main_~i~0#1 := 1 + main_~i~0#1; 9#L22-2true [2021-12-14 22:58:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 22:58:46,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:46,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129237706] [2021-12-14 22:58:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:46,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:46,754 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:46,772 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash 43923, now seen corresponding path program 1 times [2021-12-14 22:58:46,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:46,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940272095] [2021-12-14 22:58:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:46,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:46,795 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:46,807 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash 889513810, now seen corresponding path program 1 times [2021-12-14 22:58:46,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206032436] [2021-12-14 22:58:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:46,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:46,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:58:46,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206032436] [2021-12-14 22:58:46,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206032436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:58:46,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:58:46,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:58:46,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074009972] [2021-12-14 22:58:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:58:46,951 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:46,951 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:46,952 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:46,952 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:46,952 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:58:46,952 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:46,952 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:46,952 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:46,952 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration1_Loop [2021-12-14 22:58:46,953 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:46,953 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:46,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:46,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:46,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,035 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:47,036 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:58:47,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,039 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) [2021-12-14 22:58:47,039 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 [2021-12-14 22:58:47,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,062 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-14 22:58:47,062 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: [] [2021-12-14 22:58:47,077 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 [2021-12-14 22:58:47,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,084 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) [2021-12-14 22:58:47,084 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 [2021-12-14 22:58:47,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,086 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,103 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-14 22:58:47,103 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: [] [2021-12-14 22:58:47,118 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 [2021-12-14 22:58:47,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,122 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) [2021-12-14 22:58:47,123 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 [2021-12-14 22:58:47,124 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,160 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 [2021-12-14 22:58:47,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,162 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) [2021-12-14 22:58:47,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:58:47,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,173 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 [2021-12-14 22:58:47,275 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:58:47,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:47,280 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:47,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:47,280 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:47,280 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:47,280 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:58:47,280 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,280 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:47,280 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:47,281 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration1_Loop [2021-12-14 22:58:47,281 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:47,281 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:47,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,344 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:47,348 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:58:47,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,350 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) [2021-12-14 22:58:47,351 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 [2021-12-14 22:58:47,353 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 [2021-12-14 22:58:47,360 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:47,360 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:47,360 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:47,360 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:47,364 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-14 22:58:47,365 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-14 22:58:47,379 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-14 22:58:47,399 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 [2021-12-14 22:58:47,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,410 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) [2021-12-14 22:58:47,411 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 [2021-12-14 22:58:47,412 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 [2021-12-14 22:58:47,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:47,420 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:47,420 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:47,420 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:47,422 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-14 22:58:47,423 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-14 22:58:47,438 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-14 22:58:47,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:47,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,453 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) [2021-12-14 22:58:47,454 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 [2021-12-14 22:58:47,455 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 [2021-12-14 22:58:47,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:47,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:58:47,462 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:47,462 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:47,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:47,464 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:58:47,464 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:58:47,481 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:58:47,484 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-14 22:58:47,484 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-14 22:58:47,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,487 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) [2021-12-14 22:58:47,487 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 [2021-12-14 22:58:47,490 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:58:47,490 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:58:47,490 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:58:47,490 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = -1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-12-14 22:58:47,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:47,507 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:58:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:47,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:58:47,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:47,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:58:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:47,626 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-14 22:58:47,626 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-12-14 22:58:47,675 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.5) 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) Result 36 states and 54 transitions. Complement of second has 9 states. [2021-12-14 22:58:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) 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) [2021-12-14 22:58:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 34 transitions. [2021-12-14 22:58:47,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 34 transitions. Stem has 3 letters. Loop has 3 letters. [2021-12-14 22:58:47,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:47,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 34 transitions. Stem has 6 letters. Loop has 3 letters. [2021-12-14 22:58:47,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:47,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 34 transitions. Stem has 3 letters. Loop has 6 letters. [2021-12-14 22:58:47,682 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:47,682 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 54 transitions. [2021-12-14 22:58:47,684 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-14 22:58:47,686 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 15 states and 20 transitions. [2021-12-14 22:58:47,686 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-14 22:58:47,687 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-14 22:58:47,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 20 transitions. [2021-12-14 22:58:47,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:58:47,687 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-12-14 22:58:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 20 transitions. [2021-12-14 22:58:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-14 22:58:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 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) [2021-12-14 22:58:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-12-14 22:58:47,703 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-12-14 22:58:47,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:58:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:58:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:58:47,705 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-12-14 22:58:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:58:47,718 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2021-12-14 22:58:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 22:58:47,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2021-12-14 22:58:47,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-14 22:58:47,720 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 8 states and 9 transitions. [2021-12-14 22:58:47,720 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-14 22:58:47,720 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-14 22:58:47,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-12-14 22:58:47,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 22:58:47,720 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-14 22:58:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-12-14 22:58:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-12-14 22:58:47,721 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) [2021-12-14 22:58:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-12-14 22:58:47,721 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-14 22:58:47,721 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-14 22:58:47,721 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-14 22:58:47,721 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-12-14 22:58:47,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-14 22:58:47,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:58:47,722 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:58:47,722 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-14 22:58:47,722 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-14 22:58:47,722 INFO L791 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 127#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_#t~nondet2#1, main_#t~nondet3#1, main_~k~0#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~j~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~n~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 130#L20 assume main_~k~0#1 >= 1;main_~i~0#1 := 0; 131#L22-2 [2021-12-14 22:58:47,722 INFO L793 eck$LassoCheckResult]: Loop: 131#L22-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 128#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 129#L24-2 assume !(main_~j~0#1 <= main_~i~0#1); 132#L24-3 main_~i~0#1 := 1 + main_~i~0#1; 131#L22-2 [2021-12-14 22:58:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 2 times [2021-12-14 22:58:47,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:47,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765005944] [2021-12-14 22:58:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:47,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,728 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1363376, now seen corresponding path program 1 times [2021-12-14 22:58:47,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:47,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72908529] [2021-12-14 22:58:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:47,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,732 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,735 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1805126097, now seen corresponding path program 1 times [2021-12-14 22:58:47,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670405657] [2021-12-14 22:58:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:47,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,740 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:47,747 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:47,783 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:47,783 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:47,783 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:47,783 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:47,783 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:58:47,784 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,784 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:47,784 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:47,784 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration2_Loop [2021-12-14 22:58:47,784 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:47,784 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:47,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:47,825 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:47,825 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:58:47,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,827 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) [2021-12-14 22:58:47,828 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 [2021-12-14 22:58:47,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,881 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-14 22:58:47,881 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: [] [2021-12-14 22:58:47,896 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 [2021-12-14 22:58:47,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,897 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) [2021-12-14 22:58:47,898 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 [2021-12-14 22:58:47,907 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,907 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,928 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-14 22:58:47,928 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: [] [2021-12-14 22:58:47,943 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 [2021-12-14 22:58:47,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,944 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) [2021-12-14 22:58:47,945 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 [2021-12-14 22:58:47,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:47,951 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:47,994 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 [2021-12-14 22:58:47,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:47,995 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) [2021-12-14 22:58:47,996 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 [2021-12-14 22:58:47,998 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:58:47,998 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:48,139 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:58:48,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-14 22:58:48,143 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:48,143 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:48,143 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:48,143 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:48,143 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:58:48,144 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,144 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:48,144 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:48,144 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration2_Loop [2021-12-14 22:58:48,144 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:48,144 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:48,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,219 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:48,219 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:58:48,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,221 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) [2021-12-14 22:58:48,221 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 [2021-12-14 22:58:48,222 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 [2021-12-14 22:58:48,223 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 [2021-12-14 22:58:48,229 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:48,229 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:48,229 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:48,229 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:48,231 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-14 22:58:48,231 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-14 22:58:48,251 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-14 22:58:48,270 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 [2021-12-14 22:58:48,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,273 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) [2021-12-14 22:58:48,274 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 [2021-12-14 22:58:48,285 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 [2021-12-14 22:58:48,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:48,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:48,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:48,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:48,293 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-14 22:58:48,294 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-14 22:58:48,312 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-14 22:58:48,329 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 [2021-12-14 22:58:48,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,335 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) [2021-12-14 22:58:48,336 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 [2021-12-14 22:58:48,337 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 [2021-12-14 22:58:48,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:48,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:58:48,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:48,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:48,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:48,348 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:58:48,348 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:58:48,359 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:58:48,377 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-14 22:58:48,378 INFO L444 ModelExtractionUtils]: 2 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-14 22:58:48,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,388 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) [2021-12-14 22:58:48,390 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 [2021-12-14 22:58:48,391 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:58:48,391 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:58:48,391 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:58:48,391 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~k~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~k~0#1 Supporting invariants [] [2021-12-14 22:58:48,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:48,407 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:58:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:58:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:48,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:58:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:48,501 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-12-14 22:58:48,501 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-14 22:58:48,529 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 18 states and 23 transitions. Complement of second has 10 states. [2021-12-14 22:58:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-14 22:58:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2021-12-14 22:58:48,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-14 22:58:48,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:48,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-14 22:58:48,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:48,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-14 22:58:48,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:48,531 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 23 transitions. [2021-12-14 22:58:48,532 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-14 22:58:48,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 17 states and 22 transitions. [2021-12-14 22:58:48,532 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-12-14 22:58:48,532 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-12-14 22:58:48,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 22 transitions. [2021-12-14 22:58:48,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:58:48,532 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-14 22:58:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 22 transitions. [2021-12-14 22:58:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-14 22:58:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-12-14 22:58:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-12-14 22:58:48,534 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-12-14 22:58:48,534 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-12-14 22:58:48,534 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-14 22:58:48,534 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 21 transitions. [2021-12-14 22:58:48,534 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-14 22:58:48,534 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:58:48,534 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:58:48,534 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-14 22:58:48,534 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-12-14 22:58:48,534 INFO L791 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 205#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_#t~nondet2#1, main_#t~nondet3#1, main_~k~0#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~j~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~n~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 215#L20 assume main_~k~0#1 >= 1;main_~i~0#1 := 0; 216#L22-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 206#L24-2 [2021-12-14 22:58:48,534 INFO L793 eck$LassoCheckResult]: Loop: 206#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 207#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 217#L24-2 assume !(main_~j~0#1 <= main_~i~0#1); 212#L24-3 main_~i~0#1 := 1 + main_~i~0#1; 210#L22-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 206#L24-2 [2021-12-14 22:58:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 925612, now seen corresponding path program 1 times [2021-12-14 22:58:48,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:48,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616334636] [2021-12-14 22:58:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:48,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:48,538 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:48,540 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 50576359, now seen corresponding path program 2 times [2021-12-14 22:58:48,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395498409] [2021-12-14 22:58:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:48,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:48,561 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:48,567 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -440553700, now seen corresponding path program 2 times [2021-12-14 22:58:48,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442626430] [2021-12-14 22:58:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:48,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:48,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:58:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442626430] [2021-12-14 22:58:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442626430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:58:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760758167] [2021-12-14 22:58:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:58:48,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:58:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:58:48,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 22:58:48,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:58:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:58:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:58:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:48,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:58:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:48,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760758167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:58:48,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:58:48,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-14 22:58:48,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931400686] [2021-12-14 22:58:48,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:58:48,742 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:48,742 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:48,742 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:48,742 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:48,743 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:58:48,743 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,743 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:48,743 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:48,743 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration3_Loop [2021-12-14 22:58:48,743 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:48,743 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:48,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:48,794 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:48,794 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:58:48,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,796 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) [2021-12-14 22:58:48,796 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 [2021-12-14 22:58:48,798 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:48,798 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:48,821 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 [2021-12-14 22:58:48,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:48,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:48,822 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) [2021-12-14 22:58:48,824 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 [2021-12-14 22:58:48,828 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:58:48,828 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:49,012 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:58:49,015 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 [2021-12-14 22:58:49,015 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:49,015 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:49,015 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:49,015 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:49,015 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:58:49,015 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,016 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:49,016 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:49,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration3_Loop [2021-12-14 22:58:49,016 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:49,016 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:49,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,083 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:49,083 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:58:49,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,085 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) [2021-12-14 22:58:49,086 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 [2021-12-14 22:58:49,087 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 [2021-12-14 22:58:49,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:49,094 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:58:49,094 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:49,094 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:49,094 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:49,096 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:58:49,096 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:58:49,103 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:58:49,109 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-14 22:58:49,109 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-14 22:58:49,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,110 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) [2021-12-14 22:58:49,111 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 [2021-12-14 22:58:49,112 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:58:49,112 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:58:49,112 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:58:49,112 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~n~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~n~0#1 Supporting invariants [] [2021-12-14 22:58:49,126 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 [2021-12-14 22:58:49,127 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:58:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:58:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:49,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:58:49,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 22:58:49,170 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 [2021-12-14 22:58:49,170 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 7 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-12-14 22:58:49,183 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 7. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) Result 27 states and 35 transitions. Complement of second has 6 states. [2021-12-14 22:58:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-12-14 22:58:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-12-14 22:58:49,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 5 letters. [2021-12-14 22:58:49,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:49,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 9 letters. Loop has 5 letters. [2021-12-14 22:58:49,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:49,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 10 letters. [2021-12-14 22:58:49,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:49,185 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 35 transitions. [2021-12-14 22:58:49,185 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-14 22:58:49,186 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 19 states and 26 transitions. [2021-12-14 22:58:49,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-12-14 22:58:49,186 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-12-14 22:58:49,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2021-12-14 22:58:49,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:58:49,186 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-12-14 22:58:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2021-12-14 22:58:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-12-14 22:58:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 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) [2021-12-14 22:58:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2021-12-14 22:58:49,187 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-12-14 22:58:49,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:58:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 22:58:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 22:58:49,188 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-12-14 22:58:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:58:49,215 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-12-14 22:58:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 22:58:49,216 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 32 transitions. [2021-12-14 22:58:49,217 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-14 22:58:49,217 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 22 states and 29 transitions. [2021-12-14 22:58:49,217 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-12-14 22:58:49,217 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-12-14 22:58:49,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 29 transitions. [2021-12-14 22:58:49,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:58:49,217 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-12-14 22:58:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 29 transitions. [2021-12-14 22:58:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-14 22:58:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 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) [2021-12-14 22:58:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-14 22:58:49,219 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-14 22:58:49,219 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-14 22:58:49,219 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-14 22:58:49,219 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-14 22:58:49,220 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-14 22:58:49,220 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:58:49,220 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:58:49,220 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2021-12-14 22:58:49,220 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-12-14 22:58:49,220 INFO L791 eck$LassoCheckResult]: Stem: 396#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 397#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_#t~nondet2#1, main_#t~nondet3#1, main_~k~0#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~k~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~j~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~n~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 406#L20 assume main_~k~0#1 >= 1;main_~i~0#1 := 0; 403#L22-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 404#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 399#L24-2 assume !(main_~j~0#1 <= main_~i~0#1); 400#L24-3 main_~i~0#1 := 1 + main_~i~0#1; 409#L22-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 410#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 398#L24-2 [2021-12-14 22:58:49,220 INFO L793 eck$LassoCheckResult]: Loop: 398#L24-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := main_~j~0#1 + main_~k~0#1; 398#L24-2 [2021-12-14 22:58:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash -440607910, now seen corresponding path program 3 times [2021-12-14 22:58:49,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:49,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551370020] [2021-12-14 22:58:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:49,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,226 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,230 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash 54, now seen corresponding path program 1 times [2021-12-14 22:58:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:49,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845411713] [2021-12-14 22:58:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:49,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,267 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,268 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash -773943299, now seen corresponding path program 4 times [2021-12-14 22:58:49,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:58:49,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594917705] [2021-12-14 22:58:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:58:49,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:58:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,272 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:58:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:58:49,276 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:58:49,287 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 [2021-12-14 22:58:49,340 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:49,340 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:49,340 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:49,340 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:49,340 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:58:49,340 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,340 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:49,340 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:49,340 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration4_Lasso [2021-12-14 22:58:49,340 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:49,340 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:49,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,393 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:49,393 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:58:49,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,394 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) [2021-12-14 22:58:49,395 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 [2021-12-14 22:58:49,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:58:49,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:49,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-12-14 22:58:49,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,423 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) [2021-12-14 22:58:49,424 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 [2021-12-14 22:58:49,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:58:49,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:58:49,717 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:58:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:49,721 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:58:49,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:58:49,721 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:58:49,721 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:58:49,721 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:58:49,721 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,721 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:58:49,721 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:58:49,721 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig9a.c_Iteration4_Lasso [2021-12-14 22:58:49,721 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:58:49,721 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:58:49,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,734 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:58:49,779 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:58:49,779 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:58:49,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,780 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) [2021-12-14 22:58:49,781 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 [2021-12-14 22:58:49,782 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 [2021-12-14 22:58:49,788 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:58:49,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:58:49,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:58:49,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:58:49,791 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-14 22:58:49,791 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-14 22:58:49,803 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:58:49,810 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2021-12-14 22:58:49,810 INFO L444 ModelExtractionUtils]: 8 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-12-14 22:58:49,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:58:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:58:49,811 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) [2021-12-14 22:58:49,812 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 [2021-12-14 22:58:49,813 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:58:49,824 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2021-12-14 22:58:49,824 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:58:49,824 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1, ULTIMATE.start_main_~i~0#1) = -2*ULTIMATE.start_main_~j~0#1 + 2*ULTIMATE.start_main_~i~0#1 + 1 Supporting invariants [1*ULTIMATE.start_main_~k~0#1 - 1 >= 0] [2021-12-14 22:58:49,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-14 22:58:49,841 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2021-12-14 22:58:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 22:58:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:49,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:58:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:49,929 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2021-12-14 22:58:49,929 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:49,944 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Result 22 states and 28 transitions. Complement of second has 6 states. [2021-12-14 22:58:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-12-14 22:58:49,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 9 letters. Loop has 1 letters. [2021-12-14 22:58:49,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:49,945 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-14 22:58:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 22:58:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:50,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:58:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:50,016 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2021-12-14 22:58:50,016 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:50,033 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Result 22 states and 28 transitions. Complement of second has 6 states. [2021-12-14 22:58:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-12-14 22:58:50,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 9 letters. Loop has 1 letters. [2021-12-14 22:58:50,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:50,040 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-14 22:58:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:58:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:50,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 22:58:50,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:58:50,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:58:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:58:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:58:50,106 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2021-12-14 22:58:50,106 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:50,124 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 26 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Result 24 states and 31 transitions. Complement of second has 5 states. [2021-12-14 22:58:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-14 22:58:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-14 22:58:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-12-14 22:58:50,125 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 9 letters. Loop has 1 letters. [2021-12-14 22:58:50,125 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:50,125 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 1 letters. [2021-12-14 22:58:50,126 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:50,126 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 9 letters. Loop has 2 letters. [2021-12-14 22:58:50,126 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:58:50,126 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2021-12-14 22:58:50,126 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-14 22:58:50,127 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-14 22:58:50,127 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-14 22:58:50,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 22:58:50,127 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-14 22:58:50,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-14 22:58:50,127 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-14 22:58:50,127 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-14 22:58:50,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.12 10:58:50 BoogieIcfgContainer [2021-12-14 22:58:50,147 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-14 22:58:50,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 22:58:50,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 22:58:50,147 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 22:58:50,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:58:46" (3/4) ... [2021-12-14 22:58:50,150 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 22:58:50,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 22:58:50,150 INFO L158 Benchmark]: Toolchain (without parser) took 3907.23ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 79.4MB in the beginning and 65.6MB in the end (delta: 13.8MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2021-12-14 22:58:50,150 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory was 64.8MB in the beginning and 64.7MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:58:50,150 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.24ms. Allocated memory is still 107.0MB. Free memory was 79.4MB in the beginning and 85.3MB in the end (delta: -5.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2021-12-14 22:58:50,151 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.16ms. Allocated memory is still 107.0MB. Free memory was 85.3MB in the beginning and 84.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:58:50,151 INFO L158 Benchmark]: Boogie Preprocessor took 11.80ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 83.2MB in the end (delta: 840.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 22:58:50,151 INFO L158 Benchmark]: RCFGBuilder took 160.00ms. Allocated memory is still 107.0MB. Free memory was 82.9MB in the beginning and 75.2MB in the end (delta: 7.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 22:58:50,151 INFO L158 Benchmark]: BuchiAutomizer took 3551.41ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 74.9MB in the beginning and 65.6MB in the end (delta: 9.3MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2021-12-14 22:58:50,151 INFO L158 Benchmark]: Witness Printer took 2.25ms. Allocated memory is still 138.4MB. Free memory is still 65.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:58:50,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory was 64.8MB in the beginning and 64.7MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.24ms. Allocated memory is still 107.0MB. Free memory was 79.4MB in the beginning and 85.3MB in the end (delta: -5.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.16ms. Allocated memory is still 107.0MB. Free memory was 85.3MB in the beginning and 84.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.80ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 83.2MB in the end (delta: 840.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 160.00ms. Allocated memory is still 107.0MB. Free memory was 82.9MB in the beginning and 75.2MB in the end (delta: 7.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 3551.41ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 74.9MB in the beginning and 65.6MB in the end (delta: 9.3MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. * Witness Printer took 2.25ms. Allocated memory is still 138.4MB. Free memory is still 65.6MB. 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 -1 * i and consists of 6 locations. One deterministic module has affine ranking function -1 * i + k and consists of 6 locations. One deterministic module has affine ranking function -1 * i + n and consists of 4 locations. One nondeterministic module has affine ranking function -2 * j + 2 * i + 1 and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 20 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 3/4 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 55 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 111 IncrementalHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 37 mSDtfsCounter, 111 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax160 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf105 neg100 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-14 22:58:50,171 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 [2021-12-14 22:58:50,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-14 22:58:50,574 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