./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-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 ef399329f84d2482fbc6cd637d6b986ccb5018221a1a0504f889d0bed5430f95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 14:47:34,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 14:47:34,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 14:47:34,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 14:47:34,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 14:47:34,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 14:47:34,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 14:47:34,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 14:47:34,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 14:47:34,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 14:47:34,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 14:47:34,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 14:47:34,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 14:47:34,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 14:47:34,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 14:47:34,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 14:47:34,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 14:47:34,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 14:47:34,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 14:47:34,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 14:47:34,721 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 14:47:34,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 14:47:34,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 14:47:34,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 14:47:34,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 14:47:34,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 14:47:34,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 14:47:34,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 14:47:34,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 14:47:34,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 14:47:34,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 14:47:34,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 14:47:34,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 14:47:34,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 14:47:34,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 14:47:34,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 14:47:34,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 14:47:34,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 14:47:34,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 14:47:34,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 14:47:34,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 14:47:34,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 14:47:34,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-14 14:47:34,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 14:47:34,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 14:47:34,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 14:47:34,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 14:47:34,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 14:47:34,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 14:47:34,768 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 14:47:34,768 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-14 14:47:34,768 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-14 14:47:34,769 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-14 14:47:34,769 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-14 14:47:34,769 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-14 14:47:34,769 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-14 14:47:34,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 14:47:34,770 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 14:47:34,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 14:47:34,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 14:47:34,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-14 14:47:34,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-14 14:47:34,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 14:47:34,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 14:47:34,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 14:47:34,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 14:47:34,773 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-14 14:47:34,773 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef399329f84d2482fbc6cd637d6b986ccb5018221a1a0504f889d0bed5430f95 [2022-07-14 14:47:34,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 14:47:34,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 14:47:34,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 14:47:34,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 14:47:34,999 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 14:47:35,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-14 14:47:35,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda3ba4f/1991869b7a024746a0c4f904c6783cfb/FLAGa313f2e27 [2022-07-14 14:47:35,369 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 14:47:35,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-14 14:47:35,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda3ba4f/1991869b7a024746a0c4f904c6783cfb/FLAGa313f2e27 [2022-07-14 14:47:35,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda3ba4f/1991869b7a024746a0c4f904c6783cfb [2022-07-14 14:47:35,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 14:47:35,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 14:47:35,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 14:47:35,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 14:47:35,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 14:47:35,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699d5aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35, skipping insertion in model container [2022-07-14 14:47:35,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 14:47:35,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 14:47:35,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 14:47:35,566 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 14:47:35,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 14:47:35,585 INFO L208 MainTranslator]: Completed translation [2022-07-14 14:47:35,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35 WrapperNode [2022-07-14 14:47:35,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 14:47:35,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 14:47:35,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 14:47:35,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 14:47:35,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,609 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-14 14:47:35,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 14:47:35,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 14:47:35,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 14:47:35,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 14:47:35,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 14:47:35,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 14:47:35,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 14:47:35,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 14:47:35,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (1/1) ... [2022-07-14 14:47:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:35,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:35,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-14 14:47:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 14:47:35,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 14:47:35,721 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 14:47:35,723 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 14:47:35,789 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 14:47:35,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 14:47:35,794 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 14:47:35,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:47:35 BoogieIcfgContainer [2022-07-14 14:47:35,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 14:47:35,796 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-14 14:47:35,796 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-14 14:47:35,799 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-14 14:47:35,799 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:47:35,799 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.07 02:47:35" (1/3) ... [2022-07-14 14:47:35,800 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3becb8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 02:47:35, skipping insertion in model container [2022-07-14 14:47:35,800 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:47:35,800 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:47:35" (2/3) ... [2022-07-14 14:47:35,801 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3becb8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 02:47:35, skipping insertion in model container [2022-07-14 14:47:35,801 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:47:35,801 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:47:35" (3/3) ... [2022-07-14 14:47:35,802 INFO L354 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-14 14:47:35,848 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-14 14:47:35,849 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-14 14:47:35,849 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-14 14:47:35,849 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-14 14:47:35,849 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-14 14:47:35,849 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-14 14:47:35,849 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-14 14:47:35,849 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-14 14:47:35,851 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:35,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-14 14:47:35,863 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:47:35,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:47:35,867 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-14 14:47:35,867 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-14 14:47:35,867 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-14 14:47:35,868 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:35,869 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-14 14:47:35,869 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:47:35,869 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:47:35,869 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-14 14:47:35,869 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-14 14:47:35,874 INFO L752 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L19-2true [2022-07-14 14:47:35,874 INFO L754 eck$LassoCheckResult]: Loop: 2#L19-2true assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 6#L21-2true assume !(main_~j~0#1 <= main_~i~0#1); 4#L21-3true main_~i~0#1 := 1 + main_~i~0#1; 2#L19-2true [2022-07-14 14:47:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:35,881 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-07-14 14:47:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:35,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896116570] [2022-07-14 14:47:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:35,941 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:35,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash 40944, now seen corresponding path program 1 times [2022-07-14 14:47:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:35,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521014197] [2022-07-14 14:47:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:35,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:35,986 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:35,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 28699886, now seen corresponding path program 1 times [2022-07-14 14:47:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273954539] [2022-07-14 14:47:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,012 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:36,115 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:36,123 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:36,123 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:36,124 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:36,124 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 14:47:36,124 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,124 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:36,124 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:36,124 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2022-07-14 14:47:36,124 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:36,125 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:36,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,249 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:36,250 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 14:47:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-14 14:47:36,258 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:36,258 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:36,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:36,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-14 14:47:36,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 14:47:36,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:36,413 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 14:47:36,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2022-07-14 14:47:36,416 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:36,416 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:36,417 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:36,417 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:36,417 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 14:47:36,417 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,417 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:36,417 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:36,417 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2022-07-14 14:47:36,417 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:36,417 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:36,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,490 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:36,493 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 14:47:36,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-14 14:47:36,512 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:36,518 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:36,519 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:36,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:36,519 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:36,522 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:47:36,523 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:47:36,527 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:47:36,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:36,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-14 14:47:36,547 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:36,553 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:36,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:36,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:36,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:36,559 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:47:36,559 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:47:36,567 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:47:36,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:36,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-14 14:47:36,588 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:36,594 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:36,594 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 14:47:36,594 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:36,594 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:36,594 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:36,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 14:47:36,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 14:47:36,604 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 14:47:36,612 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 14:47:36,613 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 14:47:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:36,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:36,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-14 14:47:36,640 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 14:47:36,640 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 14:47:36,640 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 14:47:36,641 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = -1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2022-07-14 14:47:36,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:36,659 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 14:47:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:36,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:36,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 14:47:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:47:36,764 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 [2022-07-14 14:47:36,765 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:36,834 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 49 transitions. Complement of second has 9 states. [2022-07-14 14:47:36,835 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 [2022-07-14 14:47:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 29 transitions. [2022-07-14 14:47:36,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 2 letters. Loop has 3 letters. [2022-07-14 14:47:36,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:36,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 5 letters. Loop has 3 letters. [2022-07-14 14:47:36,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:36,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 2 letters. Loop has 6 letters. [2022-07-14 14:47:36,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:36,842 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 49 transitions. [2022-07-14 14:47:36,844 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-14 14:47:36,846 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 19 transitions. [2022-07-14 14:47:36,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2022-07-14 14:47:36,846 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2022-07-14 14:47:36,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 19 transitions. [2022-07-14 14:47:36,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:47:36,847 INFO L369 hiAutomatonCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-07-14 14:47:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 19 transitions. [2022-07-14 14:47:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-07-14 14:47:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-07-14 14:47:36,866 INFO L392 hiAutomatonCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-07-14 14:47:36,866 INFO L374 stractBuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-07-14 14:47:36,866 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-14 14:47:36,866 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 18 transitions. [2022-07-14 14:47:36,867 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-14 14:47:36,867 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:47:36,867 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:47:36,867 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 14:47:36,867 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 14:47:36,868 INFO L752 eck$LassoCheckResult]: Stem: 94#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 95#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 98#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 88#L21-2 [2022-07-14 14:47:36,868 INFO L754 eck$LassoCheckResult]: Loop: 88#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 96#L21-2 assume !(main_~j~0#1 <= main_~i~0#1); 91#L21-3 main_~i~0#1 := 1 + main_~i~0#1; 87#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 88#L21-2 [2022-07-14 14:47:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2022-07-14 14:47:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496800607] [2022-07-14 14:47:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:36,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,872 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1537394, now seen corresponding path program 1 times [2022-07-14 14:47:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620675542] [2022-07-14 14:47:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,890 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1810841241, now seen corresponding path program 1 times [2022-07-14 14:47:36,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131177842] [2022-07-14 14:47:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,916 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:36,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:36,944 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:36,944 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:36,945 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:36,945 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:36,945 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 14:47:36,945 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:36,945 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:36,945 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:36,945 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2022-07-14 14:47:36,945 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:36,945 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:36,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:36,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,006 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:37,006 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 14:47:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-14 14:47:37,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:37,011 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,040 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 14:47:37,040 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: [] [2022-07-14 14:47:37,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-14 14:47:37,078 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:37,078 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,100 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 14:47:37,100 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: [] [2022-07-14 14:47:37,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-14 14:47:37,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:37,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2022-07-14 14:47:37,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-14 14:47:37,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 14:47:37,168 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,296 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 14:47:37,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,300 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:37,300 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:37,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:37,301 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:37,301 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 14:47:37,301 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,301 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:37,301 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:37,301 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2022-07-14 14:47:37,301 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:37,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:37,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2022-07-14 14:47:37,388 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:37,388 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 14:47:37,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-07-14 14:47:37,392 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:37,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:37,398 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:37,398 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:37,398 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:37,400 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:47:37,400 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:47:37,415 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:47:37,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2022-07-14 14:47:37,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-14 14:47:37,451 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:37,457 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:37,457 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:37,457 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:37,457 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:37,465 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:47:37,465 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:47:37,481 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:47:37,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-14 14:47:37,504 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:37,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:37,510 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 14:47:37,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:37,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:37,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:37,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 14:47:37,512 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 14:47:37,520 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 14:47:37,528 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 14:47:37,528 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-14 14:47:37,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-14 14:47:37,531 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 14:47:37,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 14:47:37,532 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 14:47:37,532 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~n~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~n~0#1 Supporting invariants [] [2022-07-14 14:47:37,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,561 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 14:47:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:37,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:47:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 14:47:37,603 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 [2022-07-14 14:47:37,603 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 7 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:37,632 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 7. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 23 states and 32 transitions. Complement of second has 6 states. [2022-07-14 14:47:37,633 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 [2022-07-14 14:47:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-07-14 14:47:37,634 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-14 14:47:37,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:37,634 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-14 14:47:37,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:37,634 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-14 14:47:37,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:37,635 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2022-07-14 14:47:37,635 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-14 14:47:37,636 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 16 states and 23 transitions. [2022-07-14 14:47:37,636 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2022-07-14 14:47:37,636 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2022-07-14 14:47:37,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 23 transitions. [2022-07-14 14:47:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:47:37,636 INFO L369 hiAutomatonCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-07-14 14:47:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 23 transitions. [2022-07-14 14:47:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-07-14 14:47:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2022-07-14 14:47:37,638 INFO L392 hiAutomatonCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-07-14 14:47:37,638 INFO L374 stractBuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-07-14 14:47:37,638 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-14 14:47:37,638 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 22 transitions. [2022-07-14 14:47:37,638 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-14 14:47:37,638 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:47:37,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:47:37,638 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-14 14:47:37,639 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-14 14:47:37,639 INFO L752 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 173#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 167#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 168#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 174#L21-2 [2022-07-14 14:47:37,639 INFO L754 eck$LassoCheckResult]: Loop: 174#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 174#L21-2 [2022-07-14 14:47:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 925804, now seen corresponding path program 1 times [2022-07-14 14:47:37,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478629101] [2022-07-14 14:47:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:37,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,643 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 1 times [2022-07-14 14:47:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:37,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011241608] [2022-07-14 14:47:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,663 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 28699944, now seen corresponding path program 2 times [2022-07-14 14:47:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144785665] [2022-07-14 14:47:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,669 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:37,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:37,690 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:37,690 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:37,690 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:37,690 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:37,690 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 14:47:37,691 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,691 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:37,691 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:37,691 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2022-07-14 14:47:37,691 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:37,691 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:37,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,728 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:37,728 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 14:47:37,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-14 14:47:37,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:37,733 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,759 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 14:47:37,760 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: [] [2022-07-14 14:47:37,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,779 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-14 14:47:37,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:37,807 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2022-07-14 14:47:37,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:37,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:37,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-14 14:47:37,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 14:47:37,837 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:37,951 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 14:47:37,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:37,954 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:37,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:37,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:37,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:37,955 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 14:47:37,955 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:37,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:37,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2022-07-14 14:47:37,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:37,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:37,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:37,987 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:37,988 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 14:47:37,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:37,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,000 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,004 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:38,010 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:38,011 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:38,011 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:38,011 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:38,014 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:47:38,014 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:47:38,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-14 14:47:38,031 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:47:38,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,052 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,060 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:38,066 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:38,066 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 14:47:38,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:38,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:38,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:38,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-14 14:47:38,068 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 14:47:38,068 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 14:47:38,087 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 14:47:38,090 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 14:47:38,090 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-14 14:47:38,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-07-14 14:47:38,093 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 14:47:38,093 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 14:47:38,094 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 14:47:38,094 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~j~0#1) = 2*ULTIMATE.start_main_~i~0#1 - 2*ULTIMATE.start_main_~j~0#1 + 1 Supporting invariants [] [2022-07-14 14:47:38,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,112 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 14:47:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:47:38,139 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 [2022-07-14 14:47:38,139 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 22 transitions. cyclomatic complexity: 10 Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,146 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 22 transitions. cyclomatic complexity: 10. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 27 states and 39 transitions. Complement of second has 5 states. [2022-07-14 14:47:38,147 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 [2022-07-14 14:47:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-14 14:47:38,148 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2022-07-14 14:47:38,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 1 letters. [2022-07-14 14:47:38,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2022-07-14 14:47:38,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,149 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 39 transitions. [2022-07-14 14:47:38,150 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-14 14:47:38,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 34 transitions. [2022-07-14 14:47:38,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2022-07-14 14:47:38,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2022-07-14 14:47:38,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 34 transitions. [2022-07-14 14:47:38,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:47:38,151 INFO L369 hiAutomatonCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-07-14 14:47:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 34 transitions. [2022-07-14 14:47:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-07-14 14:47:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2022-07-14 14:47:38,153 INFO L392 hiAutomatonCegarLoop]: Abstraction has 19 states and 28 transitions. [2022-07-14 14:47:38,153 INFO L374 stractBuchiCegarLoop]: Abstraction has 19 states and 28 transitions. [2022-07-14 14:47:38,153 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-14 14:47:38,153 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 28 transitions. [2022-07-14 14:47:38,154 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-14 14:47:38,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:47:38,154 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:47:38,155 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2022-07-14 14:47:38,155 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-14 14:47:38,155 INFO L752 eck$LassoCheckResult]: Stem: 250#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 251#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 244#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 245#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 252#L21-2 assume !(main_~j~0#1 <= main_~i~0#1); 261#L21-3 main_~i~0#1 := 1 + main_~i~0#1; 259#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 255#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 254#L21-2 [2022-07-14 14:47:38,155 INFO L754 eck$LassoCheckResult]: Loop: 254#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 254#L21-2 [2022-07-14 14:47:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 301503643, now seen corresponding path program 2 times [2022-07-14 14:47:38,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405543125] [2022-07-14 14:47:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 2 times [2022-07-14 14:47:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706607840] [2022-07-14 14:47:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,171 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,173 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash 756678361, now seen corresponding path program 3 times [2022-07-14 14:47:38,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:47:38,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401913185] [2022-07-14 14:47:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:47:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:47:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,179 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:47:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:47:38,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:47:38,194 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:38,194 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:38,194 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:38,194 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:38,194 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 14:47:38,194 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,194 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:38,195 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:38,195 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2022-07-14 14:47:38,195 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:38,195 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:38,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,220 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:38,221 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 14:47:38,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,222 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-07-14 14:47:38,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:47:38,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:38,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-14 14:47:38,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 14:47:38,266 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:47:38,379 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 14:47:38,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,383 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:47:38,383 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:47:38,383 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:47:38,383 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:47:38,383 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 14:47:38,383 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,383 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:47:38,383 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:47:38,383 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2022-07-14 14:47:38,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:47:38,383 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:47:38,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:47:38,428 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:47:38,428 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 14:47:38,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-14 14:47:38,432 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 14:47:38,438 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:47:38,438 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 14:47:38,438 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:47:38,438 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:47:38,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:47:38,439 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 14:47:38,439 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 14:47:38,447 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 14:47:38,449 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 14:47:38,449 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-14 14:47:38,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:47:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:47:38,451 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 14:47:38,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-14 14:47:38,499 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 14:47:38,499 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 14:47:38,499 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 14:47:38,499 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1, ULTIMATE.start_main_~i~0#1) = -2*ULTIMATE.start_main_~j~0#1 + 2*ULTIMATE.start_main_~i~0#1 + 1 Supporting invariants [] [2022-07-14 14:47:38,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2022-07-14 14:47:38,517 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 14:47:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:47:38,559 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 [2022-07-14 14:47:38,559 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,565 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 36 transitions. Complement of second has 5 states. [2022-07-14 14:47:38,566 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 [2022-07-14 14:47:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-14 14:47:38,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-14 14:47:38,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,567 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 14:47:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:47:38,590 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 [2022-07-14 14:47:38,590 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,595 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 36 transitions. Complement of second has 5 states. [2022-07-14 14:47:38,596 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 [2022-07-14 14:47:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-14 14:47:38,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-14 14:47:38,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,597 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 14:47:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:47:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:47:38,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:47:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:47:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:47:38,633 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 [2022-07-14 14:47:38,633 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,652 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 22 states and 31 transitions. Complement of second has 4 states. [2022-07-14 14:47:38,653 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 [2022-07-14 14:47:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:47:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2022-07-14 14:47:38,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-14 14:47:38,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 9 letters. Loop has 1 letters. [2022-07-14 14:47:38,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2022-07-14 14:47:38,654 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:47:38,654 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2022-07-14 14:47:38,654 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 14:47:38,654 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2022-07-14 14:47:38,654 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-14 14:47:38,654 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-14 14:47:38,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-14 14:47:38,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-14 14:47:38,655 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 14:47:38,655 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 14:47:38,655 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 14:47:38,655 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-14 14:47:38,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-14 14:47:38,655 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 14:47:38,655 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-14 14:47:38,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.07 02:47:38 BoogieIcfgContainer [2022-07-14 14:47:38,674 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-14 14:47:38,675 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 14:47:38,675 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 14:47:38,675 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 14:47:38,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:47:35" (3/4) ... [2022-07-14 14:47:38,677 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-14 14:47:38,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 14:47:38,677 INFO L158 Benchmark]: Toolchain (without parser) took 3287.10ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 71.7MB in the beginning and 114.8MB in the end (delta: -43.1MB). Peak memory consumption was 114.1kB. Max. memory is 16.1GB. [2022-07-14 14:47:38,678 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory was 57.2MB in the beginning and 57.2MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:47:38,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.12ms. Allocated memory is still 102.8MB. Free memory was 71.5MB in the beginning and 79.8MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 14:47:38,678 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.35ms. Allocated memory is still 102.8MB. Free memory was 79.8MB in the beginning and 78.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:47:38,678 INFO L158 Benchmark]: Boogie Preprocessor took 12.38ms. Allocated memory is still 102.8MB. Free memory was 78.4MB in the beginning and 77.7MB in the end (delta: 769.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:47:38,678 INFO L158 Benchmark]: RCFGBuilder took 171.45ms. Allocated memory is still 102.8MB. Free memory was 77.7MB in the beginning and 69.7MB in the end (delta: 8.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-14 14:47:38,679 INFO L158 Benchmark]: BuchiAutomizer took 2878.07ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 69.7MB in the beginning and 114.8MB in the end (delta: -45.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:47:38,679 INFO L158 Benchmark]: Witness Printer took 2.29ms. Allocated memory is still 144.7MB. Free memory is still 114.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:47:38,680 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory was 57.2MB in the beginning and 57.2MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.12ms. Allocated memory is still 102.8MB. Free memory was 71.5MB in the beginning and 79.8MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.35ms. Allocated memory is still 102.8MB. Free memory was 79.8MB in the beginning and 78.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.38ms. Allocated memory is still 102.8MB. Free memory was 78.4MB in the beginning and 77.7MB in the end (delta: 769.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 171.45ms. Allocated memory is still 102.8MB. Free memory was 77.7MB in the beginning and 69.7MB in the end (delta: 8.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 2878.07ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 69.7MB in the beginning and 114.8MB in the end (delta: -45.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.29ms. Allocated memory is still 144.7MB. Free memory is still 114.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 -1 * i + n and consists of 4 locations. One deterministic module has affine ranking function -2 * j + 2 * i + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * j + 2 * i + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.8s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. 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 -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 32 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax191 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq156 hnf93 smp100 dnf100 smp100 tf110 neg98 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.7s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-14 14:47:38,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-14 14:47:38,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE