./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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-Fig1.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 7c08193784b646afd298f73ae6296b7af2e0cac1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:41:11,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:41:11,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:41:11,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:41:11,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:41:11,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:41:11,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:41:11,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:41:11,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:41:11,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:41:11,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:41:11,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:41:11,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:41:11,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:41:11,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:41:11,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:41:11,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:41:11,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:41:11,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:41:11,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:41:11,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:41:11,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:41:11,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:41:11,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:41:11,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:41:11,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:41:11,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:41:11,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:41:11,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:41:11,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:41:11,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:41:11,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:41:11,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:41:11,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:41:11,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:41:11,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:41:11,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:41:11,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:41:11,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:41:11,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:41:11,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:41:11,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:41:11,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:41:11,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:41:11,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:41:11,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:41:11,332 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:41:11,333 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:41:11,333 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:41:11,333 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:41:11,334 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:41:11,334 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:41:11,334 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:41:11,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:41:11,335 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:41:11,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:41:11,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:41:11,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:41:11,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:41:11,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:41:11,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:41:11,336 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:41:11,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:41:11,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:41:11,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:41:11,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:41:11,338 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:41:11,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:41:11,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:41:11,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:41:11,339 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:41:11,340 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:41:11,340 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> 7c08193784b646afd298f73ae6296b7af2e0cac1 [2020-10-19 18:41:11,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:41:11,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:41:11,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:41:11,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:41:11,712 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:41:11,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-10-19 18:41:11,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47002a704/6732f857854642648610f3cbe913377a/FLAGa2304000e [2020-10-19 18:41:12,272 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:41:12,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-10-19 18:41:12,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47002a704/6732f857854642648610f3cbe913377a/FLAGa2304000e [2020-10-19 18:41:12,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47002a704/6732f857854642648610f3cbe913377a [2020-10-19 18:41:12,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:41:12,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:41:12,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:12,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:41:12,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:41:12,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:12,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f2ad61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12, skipping insertion in model container [2020-10-19 18:41:12,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:12,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:41:12,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:41:12,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:12,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:41:12,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:12,953 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:41:12,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12 WrapperNode [2020-10-19 18:41:12,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:12,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:12,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:41:12,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:41:12,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:12,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:12,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:12,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:41:12,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:41:12,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:41:13,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... [2020-10-19 18:41:13,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:41:13,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:41:13,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:41:13,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:41:13,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:41:13,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:41:13,303 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:41:13,304 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 18:41:13,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:13 BoogieIcfgContainer [2020-10-19 18:41:13,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:41:13,308 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:41:13,308 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:41:13,312 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:41:13,313 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:13,313 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:41:12" (1/3) ... [2020-10-19 18:41:13,314 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@20c5c18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:13, skipping insertion in model container [2020-10-19 18:41:13,314 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:13,314 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:12" (2/3) ... [2020-10-19 18:41:13,315 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@20c5c18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:13, skipping insertion in model container [2020-10-19 18:41:13,315 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:13,315 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:13" (3/3) ... [2020-10-19 18:41:13,317 INFO L373 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-10-19 18:41:13,370 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:41:13,370 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:41:13,371 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:41:13,371 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:41:13,371 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:41:13,371 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:41:13,372 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:41:13,372 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:41:13,392 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:41:13,423 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:41:13,424 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:13,424 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:13,434 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:13,434 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:41:13,435 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:41:13,435 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:41:13,436 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:41:13,437 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:13,437 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:13,437 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:13,438 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:41:13,449 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 6#L19-2true [2020-10-19 18:41:13,450 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 9#L21-2true assume !(main_~j~0 <= main_~i~0); 8#L21-3true main_~i~0 := 1 + main_~i~0; 6#L19-2true [2020-10-19 18:41:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:41:13,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:13,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967341026] [2020-10-19 18:41:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,572 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,586 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:13,588 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-10-19 18:41:13,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:13,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127365620] [2020-10-19 18:41:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2020-10-19 18:41:13,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:13,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907829158] [2020-10-19 18:41:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:13,624 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:13,627 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:13,701 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:13,702 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:13,702 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:13,702 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:13,702 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:13,703 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:13,703 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:13,703 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:13,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2020-10-19 18:41:13,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:13,704 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:13,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:13,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:13,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:13,846 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:13,847 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:13,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:13,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:13,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:13,866 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:13,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:13,917 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:13,926 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:13,926 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:13,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:13,966 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:14,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:14,138 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:14,140 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:14,141 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:14,141 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:14,141 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:14,141 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:14,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:14,141 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:14,142 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2020-10-19 18:41:14,142 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:14,142 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:14,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,229 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:14,235 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:14,246 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,249 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:14,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:14,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:14,249 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:14,260 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:14,260 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:14,268 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,301 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:14,303 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:14,303 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:14,303 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:14,303 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:14,307 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:14,307 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:14,312 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,340 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:14,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:14,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:14,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:14,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:14,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:14,347 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:14,347 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:14,353 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:14,370 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:14,370 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,375 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:14,376 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:14,376 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:14,377 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:41:14,401 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:14,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:41:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:14,536 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 [2020-10-19 18:41:14,537 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2020-10-19 18:41:14,620 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 4 states. Result 30 states and 48 transitions. Complement of second has 9 states. [2020-10-19 18:41:14,620 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 [2020-10-19 18:41:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:41:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 28 transitions. [2020-10-19 18:41:14,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 3 letters. [2020-10-19 18:41:14,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:14,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-19 18:41:14,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:14,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 6 letters. [2020-10-19 18:41:14,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:14,628 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 48 transitions. [2020-10-19 18:41:14,631 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:41:14,636 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 18 transitions. [2020-10-19 18:41:14,637 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-10-19 18:41:14,638 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 18:41:14,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2020-10-19 18:41:14,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:14,639 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2020-10-19 18:41:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2020-10-19 18:41:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-10-19 18:41:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 18:41:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2020-10-19 18:41:14,667 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2020-10-19 18:41:14,667 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2020-10-19 18:41:14,667 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:41:14,667 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 17 transitions. [2020-10-19 18:41:14,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:41:14,668 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:14,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:14,668 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:41:14,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:41:14,669 INFO L794 eck$LassoCheckResult]: Stem: 82#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 83#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 85#L21-2 [2020-10-19 18:41:14,669 INFO L796 eck$LassoCheckResult]: Loop: 85#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 91#L21-2 assume !(main_~j~0 <= main_~i~0); 88#L21-3 main_~i~0 := 1 + main_~i~0; 84#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 85#L21-2 [2020-10-19 18:41:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:41:14,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:14,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520425111] [2020-10-19 18:41:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,675 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,680 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1506610, now seen corresponding path program 1 times [2020-10-19 18:41:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:14,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89990599] [2020-10-19 18:41:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,688 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,693 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,694 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 1 times [2020-10-19 18:41:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:14,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101035745] [2020-10-19 18:41:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:14,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:14,726 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:14,764 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:14,764 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:14,765 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:14,765 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:14,765 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:14,765 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:14,765 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:14,766 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2020-10-19 18:41:14,766 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:14,766 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:14,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:14,848 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:14,848 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:14,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:14,861 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:14,861 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:14,911 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:14,911 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:14,916 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:14,917 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:14,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:14,968 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:15,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:15,024 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,219 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:15,221 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:15,221 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:15,221 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:15,221 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:15,222 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:15,222 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,222 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:15,222 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:15,222 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2020-10-19 18:41:15,222 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:15,222 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:15,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,316 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:15,317 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:15,328 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:15,331 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:15,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:15,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:15,332 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:15,340 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:15,340 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,346 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:15,391 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:15,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:15,394 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:15,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:15,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:15,403 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:15,405 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,417 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:15,472 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:15,475 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:15,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:15,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:15,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:15,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:15,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:15,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,484 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:15,491 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:15,491 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:15,495 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:15,495 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:15,496 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:15,496 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,531 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:41:15,591 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 [2020-10-19 18:41:15,591 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7 Second operand 4 states. [2020-10-19 18:41:15,624 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 22 states and 31 transitions. Complement of second has 6 states. [2020-10-19 18:41:15,625 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 [2020-10-19 18:41:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:41:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-10-19 18:41:15,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-19 18:41:15,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:15,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2020-10-19 18:41:15,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:15,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 8 letters. [2020-10-19 18:41:15,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:15,628 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2020-10-19 18:41:15,631 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:15,633 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 15 states and 22 transitions. [2020-10-19 18:41:15,634 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-19 18:41:15,634 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-19 18:41:15,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2020-10-19 18:41:15,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:15,635 INFO L691 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2020-10-19 18:41:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2020-10-19 18:41:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-19 18:41:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-19 18:41:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2020-10-19 18:41:15,641 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2020-10-19 18:41:15,641 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2020-10-19 18:41:15,644 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:41:15,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 21 transitions. [2020-10-19 18:41:15,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:15,646 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:15,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:15,647 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:41:15,647 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:41:15,648 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 158#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 159#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2020-10-19 18:41:15,648 INFO L796 eck$LassoCheckResult]: Loop: 163#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2020-10-19 18:41:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:15,648 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-10-19 18:41:15,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:15,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121813774] [2020-10-19 18:41:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,679 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-10-19 18:41:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:15,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427437629] [2020-10-19 18:41:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,704 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,706 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2020-10-19 18:41:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169107755] [2020-10-19 18:41:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,720 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:15,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:15,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:15,743 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:15,743 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:15,743 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:15,743 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:15,743 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:15,744 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,744 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:15,744 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:15,744 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2020-10-19 18:41:15,744 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:15,744 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:15,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:15,799 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:15,799 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:15,815 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:15,820 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:15,820 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:15,848 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:15,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:15,885 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:16,011 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:16,014 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:16,014 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:16,014 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:16,014 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:16,014 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:16,015 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,015 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:16,015 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:16,015 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2020-10-19 18:41:16,015 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:16,015 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:16,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,080 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:16,080 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,093 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:16,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:16,095 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:16,095 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:16,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:16,098 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:16,098 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:16,102 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,135 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:41:16,136 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:16,137 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:16,137 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:16,137 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:16,137 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:16,138 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:16,139 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:16,142 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:16,149 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:16,149 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:16,155 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:16,155 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,156 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:16,156 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] [2020-10-19 18:41:16,187 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:16,213 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:16,213 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10 Second operand 2 states. [2020-10-19 18:41:16,224 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10. Second operand 2 states. Result 26 states and 38 transitions. Complement of second has 5 states. [2020-10-19 18:41:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-10-19 18:41:16,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 1 letters. [2020-10-19 18:41:16,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 1 letters. [2020-10-19 18:41:16,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-19 18:41:16,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 38 transitions. [2020-10-19 18:41:16,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:16,229 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 22 states and 33 transitions. [2020-10-19 18:41:16,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-10-19 18:41:16,230 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-19 18:41:16,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 33 transitions. [2020-10-19 18:41:16,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:16,230 INFO L691 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2020-10-19 18:41:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 33 transitions. [2020-10-19 18:41:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-10-19 18:41:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 18:41:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2020-10-19 18:41:16,233 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2020-10-19 18:41:16,233 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2020-10-19 18:41:16,233 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:41:16,233 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 27 transitions. [2020-10-19 18:41:16,234 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-19 18:41:16,234 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:16,234 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:16,236 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2020-10-19 18:41:16,236 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 18:41:16,236 INFO L794 eck$LassoCheckResult]: Stem: 229#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 230#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 232#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 236#L21-2 assume !(main_~j~0 <= main_~i~0); 245#L21-3 main_~i~0 := 1 + main_~i~0; 243#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 239#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2020-10-19 18:41:16,236 INFO L796 eck$LassoCheckResult]: Loop: 238#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2020-10-19 18:41:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 2 times [2020-10-19 18:41:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319493046] [2020-10-19 18:41:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,253 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-10-19 18:41:16,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:16,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19384883] [2020-10-19 18:41:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,257 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,260 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 780807227, now seen corresponding path program 3 times [2020-10-19 18:41:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:16,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113281132] [2020-10-19 18:41:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:16,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:16,276 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:16,289 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:16,290 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:16,290 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:16,290 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:16,290 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:16,290 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,290 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:16,290 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:16,290 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2020-10-19 18:41:16,291 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:16,291 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:16,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,339 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:16,340 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:16,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:16,343 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:16,371 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:16,503 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:16,505 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:16,505 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:16,505 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:16,505 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:16,506 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:16,506 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,506 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:16,506 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:16,506 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2020-10-19 18:41:16,506 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:16,506 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:16,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:16,566 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:16,566 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:16,578 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,580 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:16,580 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:16,580 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:16,580 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:16,580 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:16,581 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:16,581 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:16,584 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:16,589 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:16,589 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:16,592 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:16,592 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:16,593 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:16,593 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] [2020-10-19 18:41:16,613 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:16,662 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:16,662 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-10-19 18:41:16,681 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 24 states and 35 transitions. Complement of second has 5 states. [2020-10-19 18:41:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-10-19 18:41:16,683 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-19 18:41:16,683 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,683 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:16,773 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:16,773 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-10-19 18:41:16,804 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 24 states and 35 transitions. Complement of second has 5 states. [2020-10-19 18:41:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-10-19 18:41:16,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-19 18:41:16,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,806 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:16,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:16,835 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:41:16,835 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-10-19 18:41:16,852 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 21 states and 30 transitions. Complement of second has 4 states. [2020-10-19 18:41:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 18:41:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-10-19 18:41:16,853 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-19 18:41:16,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2020-10-19 18:41:16,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2020-10-19 18:41:16,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:16,854 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2020-10-19 18:41:16,856 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:16,856 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2020-10-19 18:41:16,856 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:41:16,856 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:41:16,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:41:16,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:16,857 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:16,857 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:16,857 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:16,857 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:41:16,857 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:41:16,857 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:16,857 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:41:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:41:16 BoogieIcfgContainer [2020-10-19 18:41:16,873 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:41:16,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:41:16,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:41:16,874 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:41:16,879 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:13" (3/4) ... [2020-10-19 18:41:16,883 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:41:16,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:41:16,889 INFO L168 Benchmark]: Toolchain (without parser) took 4185.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.8 MB). Free memory was 960.0 MB in the beginning and 1.2 GB in the end (delta: -210.2 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:16,890 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:16,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:16,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.98 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:16,893 INFO L168 Benchmark]: Boogie Preprocessor took 81.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:16,893 INFO L168 Benchmark]: RCFGBuilder took 239.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:16,896 INFO L168 Benchmark]: BuchiAutomizer took 3564.70 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -55.3 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:16,897 INFO L168 Benchmark]: Witness Printer took 9.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:16,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 245.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.98 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 81.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 239.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3564.70 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -55.3 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * Witness Printer took 9.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (0 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 n + -1 * i and consists of 4 locations. One deterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 18 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 26 SDtfs, 32 SDslu, 9 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax191 hnf98 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf93 smp100 dnf100 smp100 tf110 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...