./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:59:03,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:59:03,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:59:03,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:59:03,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:59:03,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:59:03,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:59:03,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:59:03,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:59:03,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:59:03,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:59:03,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:59:03,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:59:03,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:59:03,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:59:03,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:59:03,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:59:03,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:59:03,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:59:03,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:59:03,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:59:03,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:59:03,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:59:03,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:59:03,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:59:03,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:59:03,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:59:03,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:59:03,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:59:03,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:59:03,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:59:03,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:59:03,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:59:03,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:59:03,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:59:03,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:59:03,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:59:03,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:59:03,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:59:03,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:59:03,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:59:03,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-14 22:59:03,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:59:03,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:59:03,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:59:03,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:59:03,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:59:03,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:59:03,805 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:59:03,806 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-14 22:59:03,806 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-14 22:59:03,806 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-14 22:59:03,806 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-14 22:59:03,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:59:03,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:59:03,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-14 22:59:03,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:59:03,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:59:03,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:59:03,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:59:03,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:59:03,810 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-14 22:59:03,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca [2021-12-14 22:59:03,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:59:04,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:59:04,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:59:04,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:59:04,006 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:59:04,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-12-14 22:59:04,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cf1a39f/eea3cfa4878f4f4cb38a362379dc98bb/FLAG35e481a69 [2021-12-14 22:59:04,410 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:59:04,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-12-14 22:59:04,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cf1a39f/eea3cfa4878f4f4cb38a362379dc98bb/FLAG35e481a69 [2021-12-14 22:59:04,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cf1a39f/eea3cfa4878f4f4cb38a362379dc98bb [2021-12-14 22:59:04,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:59:04,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:59:04,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:59:04,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:59:04,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:59:04,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1a5633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04, skipping insertion in model container [2021-12-14 22:59:04,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:59:04,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:59:04,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:59:04,555 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:59:04,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:59:04,570 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:59:04,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04 WrapperNode [2021-12-14 22:59:04,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:59:04,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:59:04,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:59:04,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:59:04,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,588 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2021-12-14 22:59:04,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:59:04,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:59:04,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:59:04,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:59:04,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:59:04,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:59:04,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:59:04,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:59:04,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (1/1) ... [2021-12-14 22:59:04,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:04,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:04,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-14 22:59:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:59:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:59:04,678 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:59:04,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:59:04,726 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:59:04,731 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:59:04,731 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 22:59:04,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:59:04 BoogieIcfgContainer [2021-12-14 22:59:04,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:59:04,733 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-14 22:59:04,733 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-14 22:59:04,735 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-14 22:59:04,736 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:59:04,736 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.12 10:59:04" (1/3) ... [2021-12-14 22:59:04,737 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@eae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 10:59:04, skipping insertion in model container [2021-12-14 22:59:04,737 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:59:04,737 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:59:04" (2/3) ... [2021-12-14 22:59:04,737 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@eae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 10:59:04, skipping insertion in model container [2021-12-14 22:59:04,737 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 22:59:04,737 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:59:04" (3/3) ... [2021-12-14 22:59:04,738 INFO L388 chiAutomizerObserver]: Analyzing ICFG KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-12-14 22:59:04,767 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-14 22:59:04,767 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-14 22:59:04,767 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-14 22:59:04,767 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-14 22:59:04,767 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-14 22:59:04,767 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-14 22:59:04,768 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-14 22:59:04,768 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-14 22:59:04,776 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:04,786 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:04,787 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:59:04,787 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:59:04,790 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 22:59:04,790 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:59:04,790 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-14 22:59:04,791 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:04,791 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:04,792 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:59:04,792 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:59:04,792 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 22:59:04,792 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:59:04,797 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_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 10#L23-1true [2021-12-14 22:59:04,797 INFO L793 eck$LassoCheckResult]: Loop: 10#L23-1true assume !!(main_~x~0#1 < 255); 5#L18true assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 8#L18-2true assume 0 != main_~debug~0#1;main_~x~0#1 := 0; 10#L23-1true [2021-12-14 22:59:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-14 22:59:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976762311] [2021-12-14 22:59:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:04,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:04,851 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:04,869 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash 40878, now seen corresponding path program 1 times [2021-12-14 22:59:04,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755420156] [2021-12-14 22:59:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:04,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:04,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:04,919 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2021-12-14 22:59:04,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:04,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074445633] [2021-12-14 22:59:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:04,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:04,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:59:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074445633] [2021-12-14 22:59:04,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074445633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:59:04,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:59:04,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:59:04,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120335916] [2021-12-14 22:59:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:59:05,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:59:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:59:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:59:05,129 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) 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) [2021-12-14 22:59:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:59:05,137 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-12-14 22:59:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:59:05,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-12-14 22:59:05,144 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:05,146 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2021-12-14 22:59:05,147 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-12-14 22:59:05,147 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-12-14 22:59:05,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2021-12-14 22:59:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 22:59:05,148 INFO L681 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-12-14 22:59:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2021-12-14 22:59:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-12-14 22:59:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2021-12-14 22:59:05,165 INFO L704 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-12-14 22:59:05,165 INFO L587 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-12-14 22:59:05,165 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-14 22:59:05,165 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2021-12-14 22:59:05,166 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:05,166 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:59:05,166 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:59:05,167 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-14 22:59:05,167 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:59:05,167 INFO L791 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 32#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 33#L23-1 [2021-12-14 22:59:05,167 INFO L793 eck$LassoCheckResult]: Loop: 33#L23-1 assume !!(main_~x~0#1 < 255); 29#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 30#L18-2 assume !(0 != main_~debug~0#1); 33#L23-1 [2021-12-14 22:59:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-14 22:59:05,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741872142] [2021-12-14 22:59:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,173 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,176 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2021-12-14 22:59:05,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300130454] [2021-12-14 22:59:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,187 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,201 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2021-12-14 22:59:05,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040780391] [2021-12-14 22:59:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,210 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,218 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,260 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:05,263 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:05,264 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:05,264 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:05,264 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:59:05,264 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,264 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:05,264 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:05,264 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2021-12-14 22:59:05,265 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:05,265 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:05,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,328 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:05,328 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:59:05,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-14 22:59:05,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:59:05,333 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:05,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:05,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:59:05,383 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:05,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-14 22:59:05,419 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:59:05,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:05,427 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:05,427 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:05,427 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:05,427 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:05,427 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:59:05,427 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,427 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:05,427 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:05,427 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2021-12-14 22:59:05,427 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:05,427 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:05,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,483 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:05,485 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:59:05,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-14 22:59:05,490 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-14 22:59:05,496 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:59:05,496 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:59:05,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:59:05,497 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:59:05,497 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:59:05,499 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:59:05,499 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:59:05,514 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:59:05,518 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-14 22:59:05,518 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-14 22:59:05,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-14 22:59:05,537 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:59:05,537 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:59:05,538 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:59:05,538 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-12-14 22:59:05,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:05,581 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:59:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:59:05,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:05,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:59:05,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:05,652 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-14 22:59:05,652 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:05,670 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 15 transitions. Complement of second has 7 states. [2021-12-14 22:59:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:59:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-12-14 22:59:05,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2021-12-14 22:59:05,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:05,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2021-12-14 22:59:05,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:05,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2021-12-14 22:59:05,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:05,673 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2021-12-14 22:59:05,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:05,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 15 transitions. [2021-12-14 22:59:05,675 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-12-14 22:59:05,675 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-14 22:59:05,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2021-12-14 22:59:05,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:59:05,675 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-12-14 22:59:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2021-12-14 22:59:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-12-14 22:59:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-12-14 22:59:05,677 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-12-14 22:59:05,677 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-12-14 22:59:05,677 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-14 22:59:05,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2021-12-14 22:59:05,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:05,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:59:05,677 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:59:05,678 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-14 22:59:05,678 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:59:05,678 INFO L791 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 91#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 95#L23-1 assume !!(main_~x~0#1 < 255); 86#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 87#L18-2 [2021-12-14 22:59:05,678 INFO L793 eck$LassoCheckResult]: Loop: 87#L18-2 assume !(0 != main_~debug~0#1); 92#L23-1 assume !!(main_~x~0#1 < 255); 96#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 87#L18-2 [2021-12-14 22:59:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-14 22:59:05,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496141534] [2021-12-14 22:59:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,683 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,686 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2021-12-14 22:59:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64332510] [2021-12-14 22:59:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,691 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,695 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2021-12-14 22:59:05,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095358652] [2021-12-14 22:59:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:05,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,703 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:05,708 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:05,726 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:05,726 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:05,726 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:05,726 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:05,726 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:59:05,726 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,726 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:05,727 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:05,727 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2021-12-14 22:59:05,727 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:05,727 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:05,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,773 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:05,773 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:59:05,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-14 22:59:05,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:59:05,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:05,856 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 [2021-12-14 22:59:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:05,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:05,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-14 22:59:05,860 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:59:05,860 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:05,894 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:59:05,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:05,900 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:05,900 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:05,900 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:05,900 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:05,900 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:59:05,900 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,900 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:05,900 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:05,900 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2021-12-14 22:59:05,900 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:05,900 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:05,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:05,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:05,985 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:05,985 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:59:05,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,015 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-14 22:59:06,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:59:06,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:59:06,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:59:06,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:59:06,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:59:06,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:59:06,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:59:06,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-14 22:59:06,031 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:59:06,034 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-14 22:59:06,034 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-14 22:59:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-14 22:59:06,048 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:59:06,048 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:59:06,048 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:59:06,048 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-12-14 22:59:06,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,075 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:59:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:06,112 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-14 22:59:06,112 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5 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) [2021-12-14 22:59:06,120 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 17 states and 22 transitions. Complement of second has 7 states. [2021-12-14 22:59:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:59:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-12-14 22:59:06,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2021-12-14 22:59:06,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,123 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-14 22:59:06,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,123 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2021-12-14 22:59:06,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,123 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 22 transitions. [2021-12-14 22:59:06,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:06,125 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 22 transitions. [2021-12-14 22:59:06,125 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-12-14 22:59:06,125 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-12-14 22:59:06,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 22 transitions. [2021-12-14 22:59:06,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:59:06,125 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-14 22:59:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 22 transitions. [2021-12-14 22:59:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-14 22:59:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-12-14 22:59:06,128 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-14 22:59:06,128 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-14 22:59:06,137 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-14 22:59:06,137 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 22 transitions. [2021-12-14 22:59:06,138 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-14 22:59:06,138 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 22:59:06,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 22:59:06,138 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-12-14 22:59:06,138 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-14 22:59:06,138 INFO L791 eck$LassoCheckResult]: Stem: 163#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 164#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 169#L23-1 assume !!(main_~x~0#1 < 255); 173#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 165#L18-2 assume !(0 != main_~debug~0#1); 166#L23-1 assume !!(main_~x~0#1 < 255); 159#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 160#L18-2 [2021-12-14 22:59:06,138 INFO L793 eck$LassoCheckResult]: Loop: 160#L18-2 assume !(0 != main_~debug~0#1); 172#L23-1 assume !!(main_~x~0#1 < 255); 171#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 160#L18-2 [2021-12-14 22:59:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2021-12-14 22:59:06,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:06,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590732112] [2021-12-14 22:59:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:06,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:59:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590732112] [2021-12-14 22:59:06,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590732112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:59:06,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:59:06,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:59:06,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397738818] [2021-12-14 22:59:06,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:59:06,241 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 22:59:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2021-12-14 22:59:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:59:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40485822] [2021-12-14 22:59:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:59:06,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:59:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:06,246 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 22:59:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 22:59:06,249 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 22:59:06,282 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:06,282 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:06,282 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:06,282 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:06,282 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-14 22:59:06,282 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:06,282 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:06,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2021-12-14 22:59:06,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:06,283 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:06,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:06,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:06,340 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:06,340 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-14 22:59:06,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-14 22:59:06,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:59:06,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:06,366 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-14 22:59:06,366 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~debug~0#1=0} Honda state: {ULTIMATE.start_main_~debug~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-14 22:59:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,393 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-14 22:59:06,395 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-14 22:59:06,395 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:06,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-14 22:59:06,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-14 22:59:06,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-14 22:59:06,466 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-14 22:59:06,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-12-14 22:59:06,472 INFO L210 LassoAnalysis]: Preferences: [2021-12-14 22:59:06,472 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-14 22:59:06,472 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-14 22:59:06,472 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-14 22:59:06,472 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-14 22:59:06,472 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,472 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-14 22:59:06,472 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-14 22:59:06,472 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2021-12-14 22:59:06,472 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-14 22:59:06,472 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-14 22:59:06,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:06,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-14 22:59:06,519 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-14 22:59:06,520 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-14 22:59:06,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-14 22:59:06,524 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-14 22:59:06,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:59:06,530 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:59:06,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:59:06,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:59:06,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:59:06,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:59:06,530 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:59:06,543 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-14 22:59:06,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,559 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-14 22:59:06,561 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-14 22:59:06,567 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-14 22:59:06,568 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-14 22:59:06,568 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-14 22:59:06,568 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-14 22:59:06,568 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-14 22:59:06,569 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-14 22:59:06,569 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-14 22:59:06,583 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-14 22:59:06,587 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-14 22:59:06,587 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-14 22:59:06,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 22:59:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:59:06,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 22:59:06,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-14 22:59:06,606 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-14 22:59:06,606 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-14 22:59:06,606 INFO L513 LassoAnalysis]: Proved termination. [2021-12-14 22:59:06,606 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-12-14 22:59:06,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,624 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-14 22:59:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:06,667 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-14 22:59:06,667 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,674 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2021-12-14 22:59:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:59:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-12-14 22:59:06,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-14 22:59:06,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,675 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-14 22:59:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:06,713 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 [2021-12-14 22:59:06,713 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,721 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2021-12-14 22:59:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:59:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-12-14 22:59:06,723 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-14 22:59:06,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,724 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-14 22:59:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:59:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:59:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:59:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:59:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:59:06,770 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 [2021-12-14 22:59:06,770 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-12-14 22:59:06,825 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 32 transitions. Complement of second has 6 states. [2021-12-14 22:59:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-14 22:59:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-12-14 22:59:06,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-14 22:59:06,827 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2021-12-14 22:59:06,827 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,828 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2021-12-14 22:59:06,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-14 22:59:06,828 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 32 transitions. [2021-12-14 22:59:06,833 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-14 22:59:06,835 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 20 states and 26 transitions. [2021-12-14 22:59:06,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-12-14 22:59:06,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-12-14 22:59:06,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-12-14 22:59:06,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-14 22:59:06,835 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-14 22:59:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-12-14 22:59:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 9. [2021-12-14 22:59:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:59:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-12-14 22:59:06,838 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-12-14 22:59:06,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:59:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:59:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:59:06,839 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2021-12-14 22:59:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:59:06,849 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-12-14 22:59:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:59:06,851 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-12-14 22:59:06,852 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-14 22:59:06,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2021-12-14 22:59:06,853 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-14 22:59:06,853 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-14 22:59:06,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-14 22:59:06,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 22:59:06,853 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:59:06,853 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:59:06,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-14 22:59:06,855 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 22:59:06,856 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-14 22:59:06,856 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-14 22:59:06,856 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-14 22:59:06,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-14 22:59:06,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.12 10:59:06 BoogieIcfgContainer [2021-12-14 22:59:06,864 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-14 22:59:06,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 22:59:06,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 22:59:06,864 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 22:59:06,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:59:04" (3/4) ... [2021-12-14 22:59:06,868 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 22:59:06,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 22:59:06,869 INFO L158 Benchmark]: Toolchain (without parser) took 2443.09ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 56.4MB in the beginning and 80.8MB in the end (delta: -24.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:59:06,869 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:59:06,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.84ms. Allocated memory is still 88.1MB. Free memory was 56.2MB in the beginning and 65.9MB in the end (delta: -9.7MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-12-14 22:59:06,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.28ms. Allocated memory is still 88.1MB. Free memory was 65.9MB in the beginning and 64.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:59:06,870 INFO L158 Benchmark]: Boogie Preprocessor took 10.37ms. Allocated memory is still 88.1MB. Free memory was 64.8MB in the beginning and 63.6MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 22:59:06,872 INFO L158 Benchmark]: RCFGBuilder took 132.32ms. Allocated memory is still 88.1MB. Free memory was 63.6MB in the beginning and 55.9MB in the end (delta: 7.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 22:59:06,872 INFO L158 Benchmark]: BuchiAutomizer took 2130.64ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.6MB in the beginning and 81.5MB in the end (delta: -25.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:59:06,872 INFO L158 Benchmark]: Witness Printer took 4.05ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 80.8MB in the end (delta: 696.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:59:06,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.84ms. Allocated memory is still 88.1MB. Free memory was 56.2MB in the beginning and 65.9MB in the end (delta: -9.7MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.28ms. Allocated memory is still 88.1MB. Free memory was 65.9MB in the beginning and 64.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 10.37ms. Allocated memory is still 88.1MB. Free memory was 64.8MB in the beginning and 63.6MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 132.32ms. Allocated memory is still 88.1MB. Free memory was 63.6MB in the beginning and 55.9MB in the end (delta: 7.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 2130.64ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.6MB in the beginning and 81.5MB in the end (delta: -25.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.05ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 80.8MB in the end (delta: 696.5kB). 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 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One nondeterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 1.5s. 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 3. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 17 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 57 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 46 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc1 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp83 ukn100 mio100 lsp100 div346 bol100 ite100 ukn100 eq150 hnf48 smp92 dnf100 smp100 tf105 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 51ms VariablesStem: 0 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-14 22:59:06,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE