./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec 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/CookSeeZuleger-TACAS2013-Fig8a-modified.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 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 13:56:49,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:56:49,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:56:49,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:56:49,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:56:49,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:56:49,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:56:49,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:56:49,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:56:49,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:56:49,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:56:49,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:56:49,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:56:49,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:56:49,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:56:49,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:56:49,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:56:49,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:56:49,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:56:49,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:56:49,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:56:49,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:56:49,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:56:49,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:56:49,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:56:49,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:56:49,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:56:49,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:56:49,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:56:49,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:56:49,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:56:49,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:56:49,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:56:49,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:56:49,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:56:49,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:56:49,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:56:49,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:56:49,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:56:49,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:56:49,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:56:49,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:56:49,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:56:49,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:56:49,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:56:49,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:56:49,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:56:49,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:56:49,953 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:56:49,954 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:56:49,954 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:56:49,954 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:56:49,954 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:56:49,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:56:49,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:56:49,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:56:49,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:56:49,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:56:49,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:56:49,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:56:49,958 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:56:49,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 [2021-08-27 13:56:50,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:56:50,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:56:50,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:56:50,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:56:50,253 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:56:50,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2021-08-27 13:56:50,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e865f485/6db61010a4da41d7805c1b22f79c5e19/FLAG79730b230 [2021-08-27 13:56:50,649 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:56:50,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2021-08-27 13:56:50,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e865f485/6db61010a4da41d7805c1b22f79c5e19/FLAG79730b230 [2021-08-27 13:56:50,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e865f485/6db61010a4da41d7805c1b22f79c5e19 [2021-08-27 13:56:50,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:56:50,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:56:50,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:50,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:56:50,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:56:50,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c45a0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50, skipping insertion in model container [2021-08-27 13:56:50,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:56:50,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:56:50,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:50,753 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:56:50,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:50,770 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:56:50,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50 WrapperNode [2021-08-27 13:56:50,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:50,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:50,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:56:50,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:56:50,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:50,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:56:50,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:56:50,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:56:50,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:56:50,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:56:50,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:56:50,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:56:50,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (1/1) ... [2021-08-27 13:56:50,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:50,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:50,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 13:56:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:56:50,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:56:51,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:56:51,008 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 13:56:51,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:51 BoogieIcfgContainer [2021-08-27 13:56:51,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:56:51,011 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:56:51,011 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:56:51,013 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:56:51,013 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:51,014 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:56:50" (1/3) ... [2021-08-27 13:56:51,014 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@569b700a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:51, skipping insertion in model container [2021-08-27 13:56:51,014 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:51,014 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:50" (2/3) ... [2021-08-27 13:56:51,015 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@569b700a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:51, skipping insertion in model container [2021-08-27 13:56:51,015 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:51,015 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:51" (3/3) ... [2021-08-27 13:56:51,016 INFO L389 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a-modified.c [2021-08-27 13:56:51,057 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:56:51,058 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:56:51,058 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:56:51,058 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:56:51,058 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:56:51,058 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:56:51,058 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:56:51,058 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:56:51,068 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:51,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:51,081 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:51,081 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:51,084 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:56:51,085 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:56:51,085 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:56:51,085 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:51,086 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:51,086 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:51,086 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:51,086 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:56:51,086 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:56:51,091 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 7#L18-2true [2021-08-27 13:56:51,091 INFO L793 eck$LassoCheckResult]: Loop: 7#L18-2true assume !!(main_~x~0 != main_~K~0); 5#L18true assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 7#L18-2true [2021-08-27 13:56:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 13:56:51,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088272043] [2021-08-27 13:56:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,151 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,168 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-08-27 13:56:51,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985779695] [2021-08-27 13:56:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,185 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,199 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-08-27 13:56:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333821798] [2021-08-27 13:56:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,226 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,235 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:51,321 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:51,322 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:51,322 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:51,322 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:51,322 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:51,322 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,323 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:51,323 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:51,323 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2021-08-27 13:56:51,323 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:51,323 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:51,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,397 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:51,398 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:51,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 13:56:51,406 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:51,406 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:51,428 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:51,429 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:51,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:51,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 13:56:51,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:51,458 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:51,474 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:51,475 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:51,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:51,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 13:56:51,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:51,498 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:51,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-08-27 13:56:51,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 13:56:51,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:51,540 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:51,674 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:51,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:51,680 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:51,680 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:51,680 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:51,680 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:51,680 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:51,680 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,680 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:51,680 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:51,680 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2021-08-27 13:56:51,681 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:51,681 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:51,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:51,758 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:51,760 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:51,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 13:56:51,780 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:51,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:51,789 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:51,789 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:51,789 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:51,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:51,791 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:51,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:51,796 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:51,824 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 13:56:51,824 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:56:51,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:51,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:51,832 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:51,832 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:51,833 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:51,833 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] [2021-08-27 13:56:51,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 13:56:51,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-08-27 13:56:51,867 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:51,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:51,927 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 [2021-08-27 13:56:51,928 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:51,950 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 30 transitions. Complement of second has 6 states. [2021-08-27 13:56:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-08-27 13:56:51,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2021-08-27 13:56:51,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:51,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 13:56:51,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:51,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2021-08-27 13:56:51,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:51,955 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2021-08-27 13:56:51,956 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:51,958 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2021-08-27 13:56:51,959 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-27 13:56:51,959 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-08-27 13:56:51,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-08-27 13:56:51,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:51,960 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 13:56:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-08-27 13:56:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-27 13:56:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-08-27 13:56:51,975 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 13:56:51,975 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 13:56:51,975 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:56:51,975 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-08-27 13:56:51,976 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:51,976 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:51,976 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:51,976 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 13:56:51,976 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:56:51,976 INFO L791 eck$LassoCheckResult]: Stem: 67#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 68#L18-2 assume !!(main_~x~0 != main_~K~0); 63#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 64#L18-2 [2021-08-27 13:56:51,977 INFO L793 eck$LassoCheckResult]: Loop: 64#L18-2 assume !!(main_~x~0 != main_~K~0); 69#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 64#L18-2 [2021-08-27 13:56:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-08-27 13:56:51,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018889524] [2021-08-27 13:56:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,981 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,984 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-08-27 13:56:51,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817415111] [2021-08-27 13:56:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,988 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:51,990 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2021-08-27 13:56:51,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:51,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48309813] [2021-08-27 13:56:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:51,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:52,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:56:52,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48309813] [2021-08-27 13:56:52,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48309813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:56:52,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115932176] [2021-08-27 13:56:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:52,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 13:56:52,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 13:56:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:52,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115932176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:56:52,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 13:56:52,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-27 13:56:52,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020069665] [2021-08-27 13:56:52,148 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:52,148 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:52,150 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:52,150 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:52,150 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:52,150 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,151 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:52,151 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:52,151 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2021-08-27 13:56:52,151 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:52,151 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:52,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,205 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:52,205 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:52,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:52,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 13:56:52,231 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:52,231 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:52,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 13:56:52,252 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:52,252 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,273 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:52,273 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:52,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 13:56:52,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:52,295 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,345 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 13:56:52,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:52,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,483 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:52,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,486 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:52,486 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:52,486 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:52,486 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:52,486 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:52,486 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,486 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:52,487 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:52,487 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2021-08-27 13:56:52,487 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:52,487 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:52,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,523 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:52,524 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:52,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 13:56:52,527 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:52,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:52,532 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:52,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:52,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:52,535 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:52,535 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:52,548 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:52,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 13:56:52,566 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:52,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:52,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:52,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:52,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:52,574 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:52,574 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:52,596 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:52,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,614 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 13:56:52,615 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:52,621 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:52,621 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:52,621 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:52,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:52,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:52,622 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:52,622 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:52,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:52,634 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 13:56:52,634 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:56:52,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 13:56:52,651 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:52,651 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:52,651 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:52,652 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] [2021-08-27 13:56:52,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,669 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:52,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:52,702 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 [2021-08-27 13:56:52,702 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:52,708 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 11 states and 16 transitions. Complement of second has 5 states. [2021-08-27 13:56:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-08-27 13:56:52,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 13:56:52,709 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:52,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-08-27 13:56:52,709 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:52,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-08-27 13:56:52,709 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:52,710 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2021-08-27 13:56:52,710 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:52,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2021-08-27 13:56:52,711 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-08-27 13:56:52,711 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 13:56:52,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2021-08-27 13:56:52,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:52,711 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-27 13:56:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2021-08-27 13:56:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-27 13:56:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2021-08-27 13:56:52,712 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-27 13:56:52,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:56:52,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 13:56:52,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 13:56:52,718 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2021-08-27 13:56:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:56:52,742 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2021-08-27 13:56:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 13:56:52,742 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2021-08-27 13:56:52,742 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:52,743 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2021-08-27 13:56:52,743 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 13:56:52,743 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 13:56:52,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-08-27 13:56:52,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:52,744 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-08-27 13:56:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-08-27 13:56:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2021-08-27 13:56:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-08-27 13:56:52,745 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-27 13:56:52,745 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-27 13:56:52,745 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 13:56:52,745 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-08-27 13:56:52,745 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:52,745 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:52,745 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:52,746 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:56:52,746 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:56:52,746 INFO L791 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 158#L18-2 assume !!(main_~x~0 != main_~K~0); 153#L18 [2021-08-27 13:56:52,746 INFO L793 eck$LassoCheckResult]: Loop: 153#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 154#L18-2 assume !!(main_~x~0 != main_~K~0); 153#L18 [2021-08-27 13:56:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 13:56:52,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:52,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844024102] [2021-08-27 13:56:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:52,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,749 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,751 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2021-08-27 13:56:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:52,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755200347] [2021-08-27 13:56:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:52,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,768 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,771 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2021-08-27 13:56:52,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:52,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389985399] [2021-08-27 13:56:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:52,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,774 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:52,776 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:52,792 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:52,792 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:52,792 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:52,792 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:52,792 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:52,792 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,793 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:52,793 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:52,793 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2021-08-27 13:56:52,793 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:52,793 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:52,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:52,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,875 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:52,876 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:52,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,915 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:52,915 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 13:56:52,928 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:52,928 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:52,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:52,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:52,944 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:52,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 13:56:52,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:52,946 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:52,999 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 [2021-08-27 13:56:52,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:52,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:53,010 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:53,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 13:56:53,011 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:53,011 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:55,296 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:55,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:55,300 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:55,300 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:55,300 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:55,300 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:55,300 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:55,300 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,300 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:55,300 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:55,300 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2021-08-27 13:56:55,300 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:55,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:55,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,382 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:55,383 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:55,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:55,393 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:55,396 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:55,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:55,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:55,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:55,403 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 13:56:55,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:55,404 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 13:56:55,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:55,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 13:56:55,420 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:55,433 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:56:55,433 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:56:55,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:55,434 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:55,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 13:56:55,436 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:55,436 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:55,436 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:55,437 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~K~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~K~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-08-27 13:56:55,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:55,463 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:55,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:55,522 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 13:56:55,522 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:55,534 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 11 states and 13 transitions. Complement of second has 5 states. [2021-08-27 13:56:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-08-27 13:56:55,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-08-27 13:56:55,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:55,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 13:56:55,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:55,553 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2021-08-27 13:56:55,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:55,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-08-27 13:56:55,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:55,554 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-08-27 13:56:55,554 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-27 13:56:55,554 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-08-27 13:56:55,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-08-27 13:56:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:55,554 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-08-27 13:56:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-08-27 13:56:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2021-08-27 13:56:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2021-08-27 13:56:55,555 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-27 13:56:55,555 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-27 13:56:55,555 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 13:56:55,555 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2021-08-27 13:56:55,555 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 13:56:55,555 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:55,555 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:55,555 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2021-08-27 13:56:55,555 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 13:56:55,555 INFO L791 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 208#L18-2 assume !!(main_~x~0 != main_~K~0); 205#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 206#L18-2 assume !!(main_~x~0 != main_~K~0); 203#L18 [2021-08-27 13:56:55,555 INFO L793 eck$LassoCheckResult]: Loop: 203#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 204#L18-2 assume !!(main_~x~0 != main_~K~0); 203#L18 [2021-08-27 13:56:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2021-08-27 13:56:55,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:55,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876058411] [2021-08-27 13:56:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:55,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:55,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:55,565 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:55,573 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2021-08-27 13:56:55,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:55,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686744254] [2021-08-27 13:56:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:55,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:55,576 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:55,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:55,578 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2021-08-27 13:56:55,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:55,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362807560] [2021-08-27 13:56:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:55,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:55,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:56:55,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362807560] [2021-08-27 13:56:55,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362807560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:56:55,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:56:55,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 13:56:55,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779870394] [2021-08-27 13:56:55,615 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:55,615 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:55,615 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:55,615 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:55,616 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:55,616 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,616 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:55,616 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:55,616 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2021-08-27 13:56:55,616 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:55,616 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:55,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:55,670 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:55,670 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:55,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:55,671 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:55,681 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:55,681 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:55,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-27 13:56:55,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:55,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:55,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:55,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:55,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-27 13:56:55,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:55,720 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:58,042 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:58,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:58,048 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:58,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:58,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:58,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:58,048 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:58,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:58,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:58,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:58,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2021-08-27 13:56:58,048 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:58,048 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:58,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:58,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:58,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:58,117 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:58,118 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:58,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:58,119 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:58,121 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:58,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-27 13:56:58,126 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:58,126 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:58,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:58,127 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 13:56:58,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:58,128 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 13:56:58,128 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:58,141 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:58,143 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:56:58,146 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:56:58,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:58,147 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:58,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-27 13:56:58,148 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:58,148 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:58,148 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:58,148 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = -2*ULTIMATE.start_main_~x~0 + 2*ULTIMATE.start_main_~K~0 + 1 Supporting invariants [] [2021-08-27 13:56:58,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:58,166 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:58,237 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 13:56:58,237 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,242 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-08-27 13:56:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-27 13:56:58,246 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 13:56:58,246 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:58,246 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:56:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:58,311 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 13:56:58,311 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,316 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-08-27 13:56:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-27 13:56:58,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 13:56:58,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:58,317 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:56:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:58,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:58,372 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 13:56:58,372 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,383 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 8 states and 9 transitions. Complement of second has 4 states. [2021-08-27 13:56:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 13:56:58,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 13:56:58,384 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:58,385 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-08-27 13:56:58,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:58,385 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2021-08-27 13:56:58,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:58,386 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-08-27 13:56:58,386 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:56:58,386 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2021-08-27 13:56:58,387 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:56:58,387 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:56:58,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:56:58,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:56:58,387 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:58,387 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:58,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:56:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 13:56:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 13:56:58,388 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:56:58,388 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 13:56:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 13:56:58,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 13:56:58,389 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:56:58,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 13:56:58,389 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:56:58,389 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:56:58,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:56:58,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:56:58,390 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:58,390 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:58,390 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:58,390 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 13:56:58,390 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 13:56:58,390 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:56:58,390 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 13:56:58,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:56:58 BoogieIcfgContainer [2021-08-27 13:56:58,395 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:56:58,395 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:56:58,395 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:56:58,395 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:56:58,396 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:51" (3/4) ... [2021-08-27 13:56:58,398 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 13:56:58,398 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:56:58,399 INFO L168 Benchmark]: Toolchain (without parser) took 7732.52 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 46.0 MB in the beginning and 32.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:58,399 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:58,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 104.26 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 37.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:58,400 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.59 ms. Allocated memory is still 65.0 MB. Free memory was 37.4 MB in the beginning and 36.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:58,400 INFO L168 Benchmark]: Boogie Preprocessor took 11.55 ms. Allocated memory is still 65.0 MB. Free memory was 36.2 MB in the beginning and 35.3 MB in the end (delta: 839.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:58,400 INFO L168 Benchmark]: RCFGBuilder took 209.78 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 41.1 MB in the end (delta: -6.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:58,401 INFO L168 Benchmark]: BuchiAutomizer took 7384.18 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 32.2 MB in the end (delta: 8.7 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:58,401 INFO L168 Benchmark]: Witness Printer took 2.57 ms. Allocated memory is still 86.0 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:58,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 104.26 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 37.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 16.59 ms. Allocated memory is still 65.0 MB. Free memory was 37.4 MB in the beginning and 36.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.55 ms. Allocated memory is still 65.0 MB. Free memory was 36.2 MB in the beginning and 35.3 MB in the end (delta: 839.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 209.78 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 41.1 MB in the end (delta: -6.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 7384.18 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 32.2 MB in the end (delta: 8.7 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.57 ms. Allocated memory is still 86.0 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * K and consists of 4 locations. One deterministic module has affine ranking function x + -1 * K and consists of 3 locations. One deterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.3s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 6.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 9.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 42 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.4ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax202 hnf100 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 13:56:58,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:58,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 13:56:58,834 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...