./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.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 bb3f76d55016616b178303c0eddf93fcbee588d4887c9917c414ed1a56e984ba --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:20:33,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:20:33,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:20:33,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:20:33,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:20:33,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:20:33,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:20:33,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:20:33,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:20:33,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:20:33,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:20:33,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:20:33,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:20:33,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:20:33,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:20:33,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:20:33,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:20:33,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:20:33,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:20:33,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:20:33,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:20:33,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:20:33,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:20:33,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:20:33,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:20:33,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:20:33,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:20:33,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:20:33,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:20:33,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:20:33,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:20:33,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:20:33,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:20:33,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:20:33,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:20:33,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:20:33,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:20:33,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:20:33,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:20:33,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:20:33,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:20:33,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-16 09:20:33,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:20:33,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:20:33,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:20:33,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:20:33,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:20:33,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:20:33,886 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:20:33,886 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:20:33,886 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:20:33,887 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:20:33,887 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:20:33,888 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:20:33,888 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:20:33,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:20:33,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:20:33,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:20:33,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:20:33,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:20:33,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:20:33,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:20:33,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:20:33,890 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:20:33,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:20:33,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:20:33,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:20:33,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:20:33,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:20:33,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:20:33,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:20:33,892 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:20:33,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3f76d55016616b178303c0eddf93fcbee588d4887c9917c414ed1a56e984ba [2021-12-16 09:20:34,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:20:34,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:20:34,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:20:34,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:20:34,122 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:20:34,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2021-12-16 09:20:34,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44bc3382/2173ff64160a4bde8db6a5d9056fb101/FLAG01208e741 [2021-12-16 09:20:34,568 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:20:34,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2021-12-16 09:20:34,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44bc3382/2173ff64160a4bde8db6a5d9056fb101/FLAG01208e741 [2021-12-16 09:20:34,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44bc3382/2173ff64160a4bde8db6a5d9056fb101 [2021-12-16 09:20:34,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:20:34,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:20:34,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:20:34,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:20:34,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:20:34,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656e0261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34, skipping insertion in model container [2021-12-16 09:20:34,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:20:34,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:20:34,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:20:34,749 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:20:34,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:20:34,775 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:20:34,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34 WrapperNode [2021-12-16 09:20:34,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:20:34,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:20:34,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:20:34,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:20:34,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,803 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 14 [2021-12-16 09:20:34,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:20:34,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:20:34,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:20:34,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:20:34,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:20:34,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:20:34,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:20:34,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:20:34,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (1/1) ... [2021-12-16 09:20:34,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:34,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:34,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-16 09:20:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:20:34,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:20:34,926 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:20:34,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:20:34,971 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:20:34,976 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:20:34,976 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 09:20:34,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:20:34 BoogieIcfgContainer [2021-12-16 09:20:34,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:20:34,978 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:20:34,978 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:20:34,980 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:20:34,981 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:20:34,981 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:20:34" (1/3) ... [2021-12-16 09:20:34,982 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@48fe4345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:20:34, skipping insertion in model container [2021-12-16 09:20:34,982 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:20:34,982 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:20:34" (2/3) ... [2021-12-16 09:20:34,982 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@48fe4345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:20:34, skipping insertion in model container [2021-12-16 09:20:34,983 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:20:34,983 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:20:34" (3/3) ... [2021-12-16 09:20:34,984 INFO L388 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2021-12-16 09:20:35,020 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:20:35,020 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:20:35,020 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:20:35,020 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:20:35,021 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:20:35,021 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:20:35,021 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:20:35,021 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:20:35,031 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:35,045 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:35,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:20:35,046 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:20:35,049 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:20:35,049 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:20:35,049 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:20:35,049 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:35,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:35,050 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:20:35,050 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:20:35,051 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:20:35,051 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:20:35,055 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~x~0#1;havoc main_~x~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 4#L17-2true [2021-12-16 09:20:35,055 INFO L793 eck$LassoCheckResult]: Loop: 4#L17-2true assume !!(0 != main_~x~0#1); 5#L17true assume !(main_~x~0#1 > 0);main_~x~0#1 := 1 + main_~x~0#1; 4#L17-2true [2021-12-16 09:20:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-16 09:20:35,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657623367] [2021-12-16 09:20:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,118 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,130 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 1 times [2021-12-16 09:20:35,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950826403] [2021-12-16 09:20:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,140 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,144 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2021-12-16 09:20:35,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821286651] [2021-12-16 09:20:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,150 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,154 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:35,207 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:35,208 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:35,208 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:35,208 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:35,208 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:20:35,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:35,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:35,209 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2021-12-16 09:20:35,209 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:35,209 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:35,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,308 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:35,308 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:20:35,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:35,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:35,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-16 09:20:35,399 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:20:35,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:20:35,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-16 09:20:35,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:35,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:35,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:20:35,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:20:35,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:35,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-16 09:20:35,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-16 09:20:35,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:20:35,507 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:35,539 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:20:35,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,543 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:35,543 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:35,543 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:35,543 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:35,543 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:20:35,543 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,543 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:35,543 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:35,543 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2021-12-16 09:20:35,543 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:35,543 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:35,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:35,632 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:35,636 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:20:35,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,648 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:35,657 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:35,657 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:35,658 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:35,658 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:35,666 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:20:35,667 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:20:35,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-16 09:20:35,679 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:20:35,697 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 [2021-12-16 09:20:35,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-16 09:20:35,701 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:35,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:35,708 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:35,708 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:35,708 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:35,710 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:20:35,711 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:20:35,727 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:20:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-16 09:20:35,746 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:35,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:35,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:20:35,753 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:35,753 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:35,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:35,754 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:20:35,754 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:20:35,765 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:20:35,769 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:20:35,769 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:20:35,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:35,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:35,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-16 09:20:35,773 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:20:35,773 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:20:35,773 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:20:35,773 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:20:35,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:35,793 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:20:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:35,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:35,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:35,877 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 [2021-12-16 09:20:35,878 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:35,907 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 31 transitions. Complement of second has 6 states. [2021-12-16 09:20:35,909 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 [2021-12-16 09:20:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2021-12-16 09:20:35,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 2 letters. Loop has 2 letters. [2021-12-16 09:20:35,915 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:35,915 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 4 letters. Loop has 2 letters. [2021-12-16 09:20:35,915 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:35,915 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 2 letters. Loop has 4 letters. [2021-12-16 09:20:35,915 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:35,916 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2021-12-16 09:20:35,918 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:35,920 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 8 states and 11 transitions. [2021-12-16 09:20:35,921 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-12-16 09:20:35,921 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-12-16 09:20:35,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2021-12-16 09:20:35,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:20:35,922 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:20:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2021-12-16 09:20:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-16 09:20:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-12-16 09:20:35,938 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:20:35,939 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-16 09:20:35,939 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 09:20:35,939 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-12-16 09:20:35,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:35,939 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:20:35,939 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:20:35,940 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:20:35,940 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:20:35,940 INFO L791 eck$LassoCheckResult]: Stem: 73#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 74#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~x~0#1;havoc main_~x~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 75#L17-2 assume !!(0 != main_~x~0#1); 68#L17 assume main_~x~0#1 > 0;main_~x~0#1 := main_~x~0#1 - 1; 69#L17-2 [2021-12-16 09:20:35,940 INFO L793 eck$LassoCheckResult]: Loop: 69#L17-2 assume !!(0 != main_~x~0#1); 72#L17 assume !(main_~x~0#1 > 0);main_~x~0#1 := 1 + main_~x~0#1; 69#L17-2 [2021-12-16 09:20:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-16 09:20:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646416568] [2021-12-16 09:20:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,946 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,949 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 2 times [2021-12-16 09:20:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763183145] [2021-12-16 09:20:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,954 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:35,956 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash 889692235, now seen corresponding path program 1 times [2021-12-16 09:20:35,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:35,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184064571] [2021-12-16 09:20:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:35,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:36,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:20:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184064571] [2021-12-16 09:20:36,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184064571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:20:36,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:20:36,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 09:20:36,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014742170] [2021-12-16 09:20:36,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:20:36,027 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:36,028 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:36,028 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:36,028 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:36,028 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:20:36,028 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,028 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:36,028 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:36,028 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2021-12-16 09:20:36,028 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:36,028 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:36,030 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,079 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:36,079 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:20:36,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:36,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-16 09:20:36,146 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:20:36,146 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:20:36,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:36,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-16 09:20:36,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:20:36,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:20:36,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-16 09:20:36,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:36,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-16 09:20:36,234 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:20:36,234 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,264 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:20:36,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-16 09:20:36,269 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:36,270 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:36,270 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:36,270 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:36,270 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:20:36,270 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,270 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:36,270 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:36,270 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2021-12-16 09:20:36,270 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:36,270 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:36,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,322 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:36,322 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:20:36,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-16 09:20:36,334 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:36,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:36,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:36,342 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:36,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:36,348 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:20:36,348 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:20:36,377 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:20:36,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,406 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-16 09:20:36,408 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:36,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:36,414 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:36,414 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:36,414 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:36,416 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:20:36,416 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-16 09:20:36,423 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:20:36,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,439 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-16 09:20:36,441 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:36,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:36,447 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:20:36,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:36,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:36,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:36,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:20:36,449 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:20:36,471 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:20:36,484 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:20:36,485 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:20:36,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,498 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:20:36,498 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:20:36,498 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:20:36,498 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:20:36,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-16 09:20:36,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,520 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:20:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:36,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:36,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:36,560 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 [2021-12-16 09:20:36,561 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:36,573 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 17 transitions. Complement of second has 5 states. [2021-12-16 09:20:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-16 09:20:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-12-16 09:20:36,575 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2021-12-16 09:20:36,575 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:36,575 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2021-12-16 09:20:36,575 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:36,576 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2021-12-16 09:20:36,576 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:36,576 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 17 transitions. [2021-12-16 09:20:36,578 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:36,579 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 17 transitions. [2021-12-16 09:20:36,579 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-12-16 09:20:36,579 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-16 09:20:36,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2021-12-16 09:20:36,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:20:36,580 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-12-16 09:20:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2021-12-16 09:20:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-16 09:20:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-12-16 09:20:36,581 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-12-16 09:20:36,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:20:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:20:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:20:36,587 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:20:36,601 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-12-16 09:20:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 09:20:36,603 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-12-16 09:20:36,604 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:36,605 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 10 states and 12 transitions. [2021-12-16 09:20:36,605 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-16 09:20:36,605 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-16 09:20:36,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 12 transitions. [2021-12-16 09:20:36,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:20:36,605 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-12-16 09:20:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 12 transitions. [2021-12-16 09:20:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 7. [2021-12-16 09:20:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2021-12-16 09:20:36,607 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-16 09:20:36,607 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-16 09:20:36,607 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-16 09:20:36,607 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2021-12-16 09:20:36,608 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:36,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:20:36,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:20:36,609 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:20:36,609 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:20:36,609 INFO L791 eck$LassoCheckResult]: Stem: 155#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 156#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~x~0#1;havoc main_~x~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 157#L17-2 assume !!(0 != main_~x~0#1); 151#L17 [2021-12-16 09:20:36,610 INFO L793 eck$LassoCheckResult]: Loop: 151#L17 assume main_~x~0#1 > 0;main_~x~0#1 := main_~x~0#1 - 1; 152#L17-2 assume !!(0 != main_~x~0#1); 151#L17 [2021-12-16 09:20:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-12-16 09:20:36,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061181896] [2021-12-16 09:20:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:36,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,629 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,631 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1406, now seen corresponding path program 1 times [2021-12-16 09:20:36,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654021912] [2021-12-16 09:20:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:36,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,637 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,639 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash 28699749, now seen corresponding path program 2 times [2021-12-16 09:20:36,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:36,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656533541] [2021-12-16 09:20:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:36,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,656 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:36,659 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:36,673 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:36,673 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:36,673 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:36,673 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:36,673 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:20:36,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:36,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:36,673 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2021-12-16 09:20:36,673 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:36,674 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:36,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,716 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:36,716 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:20:36,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-16 09:20:36,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:36,720 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,753 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 [2021-12-16 09:20:36,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,755 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-16 09:20:36,757 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:20:36,757 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:36,808 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:20:36,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,813 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:36,813 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:36,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:36,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:36,813 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:20:36,814 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,814 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:36,814 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:36,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2021-12-16 09:20:36,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:36,814 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:36,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:36,872 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:36,872 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:20:36,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-16 09:20:36,881 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:36,886 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:36,886 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:20:36,887 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:36,887 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:36,887 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:36,887 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:20:36,887 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:20:36,903 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:20:36,905 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-16 09:20:36,905 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 09:20:36,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:36,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:36,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-16 09:20:36,918 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:20:36,918 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:20:36,919 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:20:36,919 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:20:36,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:36,937 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:20:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:36,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:36,994 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-16 09:20:36,994 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,000 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 14 transitions. Complement of second has 5 states. [2021-12-16 09:20:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-16 09:20:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-12-16 09:20:37,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-12-16 09:20:37,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:20:37,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-16 09:20:37,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,003 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2021-12-16 09:20:37,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:37,004 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 8 states and 9 transitions. [2021-12-16 09:20:37,004 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-12-16 09:20:37,004 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-12-16 09:20:37,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-12-16 09:20:37,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:20:37,004 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-16 09:20:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-12-16 09:20:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-12-16 09:20:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-12-16 09:20:37,006 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-16 09:20:37,006 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-16 09:20:37,006 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-16 09:20:37,006 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-12-16 09:20:37,006 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:20:37,006 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:20:37,006 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:20:37,007 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-12-16 09:20:37,007 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:20:37,007 INFO L791 eck$LassoCheckResult]: Stem: 211#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 212#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~x~0#1;havoc main_~x~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 210#L17-2 assume !!(0 != main_~x~0#1); 208#L17 assume !(main_~x~0#1 > 0);main_~x~0#1 := 1 + main_~x~0#1; 209#L17-2 assume !!(0 != main_~x~0#1); 206#L17 [2021-12-16 09:20:37,007 INFO L793 eck$LassoCheckResult]: Loop: 206#L17 assume main_~x~0#1 > 0;main_~x~0#1 := main_~x~0#1 - 1; 207#L17-2 assume !!(0 != main_~x~0#1); 206#L17 [2021-12-16 09:20:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 28699811, now seen corresponding path program 2 times [2021-12-16 09:20:37,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:37,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272542704] [2021-12-16 09:20:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:37,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:37,012 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:37,015 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1406, now seen corresponding path program 2 times [2021-12-16 09:20:37,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:37,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906577271] [2021-12-16 09:20:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:37,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:37,019 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:20:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:20:37,022 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:20:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1810715040, now seen corresponding path program 2 times [2021-12-16 09:20:37,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:20:37,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796190427] [2021-12-16 09:20:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:20:37,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:20:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:20:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796190427] [2021-12-16 09:20:37,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796190427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:20:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437864196] [2021-12-16 09:20:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:20:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:20:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,044 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:20:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:20:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 09:20:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:20:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437864196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:20:37,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:20:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-16 09:20:37,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054779108] [2021-12-16 09:20:37,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:20:37,157 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:37,157 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:37,157 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:37,157 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:37,157 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:20:37,157 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,157 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:37,157 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:37,157 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2021-12-16 09:20:37,157 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:37,157 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:37,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,205 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:37,205 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:20:37,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,211 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:37,217 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:37,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-16 09:20:37,231 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:20:37,231 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:20:37,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,247 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-16 09:20:37,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:20:37,249 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:37,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,272 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-16 09:20:37,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:20:37,273 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:20:37,326 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:20:37,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,330 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:20:37,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:20:37,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:20:37,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:20:37,330 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:20:37,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:20:37,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:20:37,330 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2021-12-16 09:20:37,330 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:20:37,331 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:20:37,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:20:37,383 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:20:37,383 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:20:37,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,384 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:20:37,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-16 09:20:37,399 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:20:37,399 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:20:37,399 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:20:37,399 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:20:37,399 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:20:37,400 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:20:37,400 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:20:37,440 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:20:37,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,442 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-16 09:20:37,442 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 09:20:37,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:20:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:20:37,443 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:20:37,452 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:20:37,452 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:20:37,453 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:20:37,453 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-16 09:20:37,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-16 09:20:37,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-16 09:20:37,472 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:20:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,514 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-16 09:20:37,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,517 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 8 states and 9 transitions. Complement of second has 3 states. [2021-12-16 09:20:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-12-16 09:20:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3 transitions. [2021-12-16 09:20:37,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 3 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:20:37,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,518 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:20:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,555 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-16 09:20:37,555 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,558 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 8 states and 9 transitions. Complement of second has 3 states. [2021-12-16 09:20:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-12-16 09:20:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3 transitions. [2021-12-16 09:20:37,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 3 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:20:37,560 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,560 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:20:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:20:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:20:37,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:20:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:20:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:20:37,593 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-16 09:20:37,593 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,599 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 9 states and 10 transitions. Complement of second has 4 states. [2021-12-16 09:20:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-16 09:20:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-12-16 09:20:37,600 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:20:37,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:20:37,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 4 letters. [2021-12-16 09:20:37,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:20:37,601 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-12-16 09:20:37,602 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:20:37,602 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2021-12-16 09:20:37,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 09:20:37,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 09:20:37,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 09:20:37,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 09:20:37,602 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:20:37,602 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:20:37,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:20:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:20:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:20:37,603 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:20:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:20:37,603 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-12-16 09:20:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 09:20:37,603 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-12-16 09:20:37,603 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:20:37,603 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 09:20:37,604 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 09:20:37,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 09:20:37,604 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-16 09:20:37,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-16 09:20:37,604 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 09:20:37,604 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-16 09:20:37,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.12 09:20:37 BoogieIcfgContainer [2021-12-16 09:20:37,610 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-16 09:20:37,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 09:20:37,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 09:20:37,610 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 09:20:37,611 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:20:34" (3/4) ... [2021-12-16 09:20:37,613 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 09:20:37,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 09:20:37,613 INFO L158 Benchmark]: Toolchain (without parser) took 3028.68ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 71.9MB in the end (delta: -16.2MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. [2021-12-16 09:20:37,614 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 60.7MB in the end (delta: 19.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:20:37,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.00ms. Allocated memory is still 90.2MB. Free memory was 55.5MB in the beginning and 67.8MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 09:20:37,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.47ms. Allocated memory is still 90.2MB. Free memory was 67.8MB in the beginning and 66.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:20:37,615 INFO L158 Benchmark]: Boogie Preprocessor took 12.20ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 65.7MB in the end (delta: 920.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 09:20:37,615 INFO L158 Benchmark]: RCFGBuilder took 160.57ms. Allocated memory is still 90.2MB. Free memory was 65.7MB in the beginning and 58.2MB in the end (delta: 7.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-16 09:20:37,615 INFO L158 Benchmark]: BuchiAutomizer took 2631.95ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 57.8MB in the beginning and 72.4MB in the end (delta: -14.6MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2021-12-16 09:20:37,616 INFO L158 Benchmark]: Witness Printer took 2.70ms. Allocated memory is still 111.1MB. Free memory was 72.4MB in the beginning and 71.9MB in the end (delta: 520.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:20:37,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 60.7MB in the end (delta: 19.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.00ms. Allocated memory is still 90.2MB. Free memory was 55.5MB in the beginning and 67.8MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.47ms. Allocated memory is still 90.2MB. Free memory was 67.8MB in the beginning and 66.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.20ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 65.7MB in the end (delta: 920.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 160.57ms. Allocated memory is still 90.2MB. Free memory was 65.7MB in the beginning and 58.2MB in the end (delta: 7.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * BuchiAutomizer took 2631.95ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 57.8MB in the beginning and 72.4MB in the end (delta: -14.6MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Witness Printer took 2.70ms. Allocated memory is still 111.1MB. Free memory was 72.4MB in the beginning and 71.9MB in the end (delta: 520.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -1 * x and consists of 4 locations. One deterministic module has affine ranking function -1 * x and consists of 3 locations. One deterministic module has affine ranking function x and consists of 3 locations. One nondeterministic module has affine ranking function x 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 2.5s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 8 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 29 mSDtfsCounter, 39 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax185 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq171 hnf95 smp69 dnf100 smp100 tf112 neg94 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 43ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-16 09:20:37,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-12-16 09:20:37,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-16 09:20:38,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE