./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Flip2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 574ddb4e 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-restricted-15/Flip2.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 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-19 00:16:10,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-19 00:16:10,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-19 00:16:10,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-19 00:16:10,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-19 00:16:10,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-19 00:16:10,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-19 00:16:10,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-19 00:16:10,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-19 00:16:10,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-19 00:16:10,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-19 00:16:10,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-19 00:16:10,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-19 00:16:10,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-19 00:16:10,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-19 00:16:10,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-19 00:16:10,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-19 00:16:10,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-19 00:16:10,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-19 00:16:10,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-19 00:16:10,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-19 00:16:10,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-19 00:16:10,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-19 00:16:10,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-19 00:16:10,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-19 00:16:10,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-19 00:16:10,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-19 00:16:10,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-19 00:16:10,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-19 00:16:10,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-19 00:16:10,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-19 00:16:10,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-19 00:16:10,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-19 00:16:10,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-19 00:16:10,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-19 00:16:10,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-19 00:16:10,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-19 00:16:10,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-19 00:16:10,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-19 00:16:10,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-19 00:16:10,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-19 00:16:10,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-19 00:16:10,107 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-19 00:16:10,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-19 00:16:10,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-19 00:16:10,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-19 00:16:10,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-19 00:16:10,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-19 00:16:10,110 INFO L138 SettingsManager]: * Use SBE=true [2023-02-19 00:16:10,111 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-19 00:16:10,111 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-19 00:16:10,111 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-19 00:16:10,112 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-19 00:16:10,112 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-19 00:16:10,112 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-19 00:16:10,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-19 00:16:10,112 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-19 00:16:10,113 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-19 00:16:10,114 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-19 00:16:10,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-19 00:16:10,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-19 00:16:10,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-19 00:16:10,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-19 00:16:10,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-19 00:16:10,116 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-19 00:16:10,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac [2023-02-19 00:16:10,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-19 00:16:10,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-19 00:16:10,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-19 00:16:10,340 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-19 00:16:10,340 INFO L275 PluginConnector]: CDTParser initialized [2023-02-19 00:16:10,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Flip2.c [2023-02-19 00:16:11,300 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-19 00:16:11,491 INFO L351 CDTParser]: Found 1 translation units. [2023-02-19 00:16:11,495 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Flip2.c [2023-02-19 00:16:11,499 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f2c09fc/bd34416650fe49dfac71d6c371bdbaed/FLAG2e103a56a [2023-02-19 00:16:11,512 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f2c09fc/bd34416650fe49dfac71d6c371bdbaed [2023-02-19 00:16:11,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-19 00:16:11,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-19 00:16:11,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-19 00:16:11,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-19 00:16:11,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-19 00:16:11,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1243bb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11, skipping insertion in model container [2023-02-19 00:16:11,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-19 00:16:11,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-19 00:16:11,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-19 00:16:11,628 INFO L203 MainTranslator]: Completed pre-run [2023-02-19 00:16:11,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-19 00:16:11,645 INFO L208 MainTranslator]: Completed translation [2023-02-19 00:16:11,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11 WrapperNode [2023-02-19 00:16:11,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-19 00:16:11,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-19 00:16:11,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-19 00:16:11,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-19 00:16:11,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,665 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2023-02-19 00:16:11,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-19 00:16:11,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-19 00:16:11,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-19 00:16:11,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-19 00:16:11,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,676 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-19 00:16:11,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-19 00:16:11,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-19 00:16:11,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-19 00:16:11,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (1/1) ... [2023-02-19 00:16:11,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:11,698 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) [2023-02-19 00:16:11,706 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 [2023-02-19 00:16:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-19 00:16:11,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-19 00:16:11,775 INFO L235 CfgBuilder]: Building ICFG [2023-02-19 00:16:11,776 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-19 00:16:11,858 INFO L276 CfgBuilder]: Performing block encoding [2023-02-19 00:16:11,862 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-19 00:16:11,862 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-19 00:16:11,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 12:16:11 BoogieIcfgContainer [2023-02-19 00:16:11,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-19 00:16:11,864 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-19 00:16:11,865 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-19 00:16:11,867 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-19 00:16:11,867 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-19 00:16:11,867 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.02 12:16:11" (1/3) ... [2023-02-19 00:16:11,868 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4c8b6405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.02 12:16:11, skipping insertion in model container [2023-02-19 00:16:11,868 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-19 00:16:11,868 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 12:16:11" (2/3) ... [2023-02-19 00:16:11,869 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4c8b6405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.02 12:16:11, skipping insertion in model container [2023-02-19 00:16:11,869 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-19 00:16:11,869 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 12:16:11" (3/3) ... [2023-02-19 00:16:11,870 INFO L332 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2023-02-19 00:16:11,911 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-19 00:16:11,912 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-19 00:16:11,912 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-19 00:16:11,912 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-19 00:16:11,912 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-19 00:16:11,912 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-19 00:16:11,912 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-19 00:16:11,912 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-19 00:16:11,915 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) [2023-02-19 00:16:11,928 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-02-19 00:16:11,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:11,928 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:11,932 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-19 00:16:11,932 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-02-19 00:16:11,932 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-19 00:16:11,932 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) [2023-02-19 00:16:11,933 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-02-19 00:16:11,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:11,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:11,933 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-19 00:16:11,933 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-02-19 00:16:11,938 INFO L748 eck$LassoCheckResult]: Stem: 6#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 2#L19-2true [2023-02-19 00:16:11,938 INFO L750 eck$LassoCheckResult]: Loop: 2#L19-2true assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 9#L14true assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 2#L19-2true [2023-02-19 00:16:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-02-19 00:16:11,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:11,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964338632] [2023-02-19 00:16:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:11,998 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 1 times [2023-02-19 00:16:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914555487] [2023-02-19 00:16:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,049 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2023-02-19 00:16:12,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:12,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73786055] [2023-02-19 00:16:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:12,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,108 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:12,109 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:12,109 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:12,110 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:12,110 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-19 00:16:12,110 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,110 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:12,111 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:12,111 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2023-02-19 00:16:12,111 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:12,111 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:12,122 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,128 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,130 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,141 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:12,142 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-19 00:16:12,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,146 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) [2023-02-19 00:16:12,147 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 [2023-02-19 00:16:12,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,163 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:12,163 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:12,168 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 [2023-02-19 00:16:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,170 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) [2023-02-19 00:16:12,171 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 [2023-02-19 00:16:12,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,188 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:12,188 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:12,191 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 [2023-02-19 00:16:12,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,192 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) [2023-02-19 00:16:12,194 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 [2023-02-19 00:16:12,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,231 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 [2023-02-19 00:16:12,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,232 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) [2023-02-19 00:16:12,234 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 [2023-02-19 00:16:12,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-19 00:16:12,236 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,452 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-19 00:16:12,456 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 [2023-02-19 00:16:12,456 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:12,456 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:12,456 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:12,456 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:12,456 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-19 00:16:12,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:12,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:12,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2023-02-19 00:16:12,456 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:12,456 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:12,458 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,460 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,462 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,467 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:12,470 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-19 00:16:12,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,473 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) [2023-02-19 00:16:12,478 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 [2023-02-19 00:16:12,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:12,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:12,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:12,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:12,488 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 [2023-02-19 00:16:12,506 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:12,507 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:12,521 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:12,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:12,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,528 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) [2023-02-19 00:16:12,530 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 [2023-02-19 00:16:12,531 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 [2023-02-19 00:16:12,537 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:12,538 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:12,538 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:12,538 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:12,540 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:12,540 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:12,568 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:12,573 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 [2023-02-19 00:16:12,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,575 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) [2023-02-19 00:16:12,576 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 [2023-02-19 00:16:12,578 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 [2023-02-19 00:16:12,584 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:12,584 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-19 00:16:12,585 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:12,585 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:12,585 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:12,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-19 00:16:12,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-19 00:16:12,604 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-19 00:16:12,623 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-19 00:16:12,623 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-19 00:16:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,654 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) [2023-02-19 00:16:12,655 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 [2023-02-19 00:16:12,656 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-19 00:16:12,656 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-19 00:16:12,657 INFO L513 LassoAnalysis]: Proved termination. [2023-02-19 00:16:12,657 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2023-02-19 00:16:12,662 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 [2023-02-19 00:16:12,666 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-19 00:16:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-19 00:16:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:12,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-19 00:16:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:12,734 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-02-19 00:16:12,735 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:12,766 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 44 transitions. Complement of second has 8 states. [2023-02-19 00:16:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-02-19 00:16:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2023-02-19 00:16:12,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 2 letters. [2023-02-19 00:16:12,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:12,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 4 letters. Loop has 2 letters. [2023-02-19 00:16:12,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:12,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 4 letters. [2023-02-19 00:16:12,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:12,774 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 44 transitions. [2023-02-19 00:16:12,776 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2023-02-19 00:16:12,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 20 transitions. [2023-02-19 00:16:12,778 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2023-02-19 00:16:12,778 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2023-02-19 00:16:12,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2023-02-19 00:16:12,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:12,779 INFO L218 hiAutomatonCegarLoop]: Abstraction has 14 states and 20 transitions. [2023-02-19 00:16:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2023-02-19 00:16:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-02-19 00:16:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-02-19 00:16:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2023-02-19 00:16:12,795 INFO L240 hiAutomatonCegarLoop]: Abstraction has 13 states and 19 transitions. [2023-02-19 00:16:12,795 INFO L428 stractBuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2023-02-19 00:16:12,796 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-19 00:16:12,796 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2023-02-19 00:16:12,796 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2023-02-19 00:16:12,796 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:12,796 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:12,796 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-19 00:16:12,796 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-19 00:16:12,797 INFO L748 eck$LassoCheckResult]: Stem: 83#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 84#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 85#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 80#L14 [2023-02-19 00:16:12,797 INFO L750 eck$LassoCheckResult]: Loop: 80#L14 assume !(main_~i~0#1 < main_~j~0#1); 89#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 79#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 80#L14 [2023-02-19 00:16:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2023-02-19 00:16:12,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296225894] [2023-02-19 00:16:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:12,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 45829, now seen corresponding path program 1 times [2023-02-19 00:16:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:12,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61644114] [2023-02-19 00:16:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,811 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,813 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash 889694462, now seen corresponding path program 1 times [2023-02-19 00:16:12,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:12,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748074179] [2023-02-19 00:16:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:12,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:12,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:12,827 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:12,827 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:12,827 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:12,827 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:12,827 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-19 00:16:12,828 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,828 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:12,828 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:12,828 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2023-02-19 00:16:12,828 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:12,828 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:12,830 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,832 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,833 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:12,838 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:12,838 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-19 00:16:12,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,839 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) [2023-02-19 00:16:12,841 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 [2023-02-19 00:16:12,842 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,842 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:12,865 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:12,873 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 [2023-02-19 00:16:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,875 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) [2023-02-19 00:16:12,876 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 [2023-02-19 00:16:12,878 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,878 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,894 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:12,894 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:12,896 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 [2023-02-19 00:16:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,898 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) [2023-02-19 00:16:12,899 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 [2023-02-19 00:16:12,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:12,901 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:12,916 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) [2023-02-19 00:16:12,917 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 [2023-02-19 00:16:12,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-19 00:16:12,919 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:12,999 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-19 00:16:13,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2023-02-19 00:16:13,002 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:13,002 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:13,002 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:13,002 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:13,002 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-19 00:16:13,002 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,003 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:13,003 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:13,003 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2023-02-19 00:16:13,003 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:13,003 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:13,004 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,005 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,006 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,009 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:13,009 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-19 00:16:13,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,021 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) [2023-02-19 00:16:13,024 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 [2023-02-19 00:16:13,025 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 [2023-02-19 00:16:13,031 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,031 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,031 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,036 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:13,036 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:13,060 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:13,069 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 [2023-02-19 00:16:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,071 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) [2023-02-19 00:16:13,072 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 [2023-02-19 00:16:13,074 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 [2023-02-19 00:16:13,079 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,080 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,080 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,080 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,082 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:13,083 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:13,098 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:13,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,106 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,114 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 [2023-02-19 00:16:13,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,119 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-19 00:16:13,120 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,120 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,120 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,121 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-19 00:16:13,121 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-19 00:16:13,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-02-19 00:16:13,135 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-19 00:16:13,140 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-02-19 00:16:13,140 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2023-02-19 00:16:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,142 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-02-19 00:16:13,145 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-19 00:16:13,145 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-19 00:16:13,145 INFO L513 LassoAnalysis]: Proved termination. [2023-02-19 00:16:13,145 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2023-02-19 00:16:13,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2023-02-19 00:16:13,149 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-19 00:16:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:13,184 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-02-19 00:16:13,184 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,204 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 35 states and 50 transitions. Complement of second has 7 states. [2023-02-19 00:16:13,205 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 [2023-02-19 00:16:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2023-02-19 00:16:13,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 3 letters. [2023-02-19 00:16:13,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 6 letters. Loop has 3 letters. [2023-02-19 00:16:13,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 6 letters. [2023-02-19 00:16:13,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 50 transitions. [2023-02-19 00:16:13,209 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2023-02-19 00:16:13,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 31 states and 45 transitions. [2023-02-19 00:16:13,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2023-02-19 00:16:13,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2023-02-19 00:16:13,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 45 transitions. [2023-02-19 00:16:13,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:13,211 INFO L218 hiAutomatonCegarLoop]: Abstraction has 31 states and 45 transitions. [2023-02-19 00:16:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 45 transitions. [2023-02-19 00:16:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-02-19 00:16:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 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) [2023-02-19 00:16:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 38 transitions. [2023-02-19 00:16:13,214 INFO L240 hiAutomatonCegarLoop]: Abstraction has 25 states and 38 transitions. [2023-02-19 00:16:13,214 INFO L428 stractBuchiCegarLoop]: Abstraction has 25 states and 38 transitions. [2023-02-19 00:16:13,214 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-19 00:16:13,214 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 38 transitions. [2023-02-19 00:16:13,215 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2023-02-19 00:16:13,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:13,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:13,216 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-02-19 00:16:13,216 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-19 00:16:13,216 INFO L748 eck$LassoCheckResult]: Stem: 172#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 173#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 178#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 182#L14 assume !(main_~i~0#1 < main_~j~0#1); 174#L19 [2023-02-19 00:16:13,216 INFO L750 eck$LassoCheckResult]: Loop: 174#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 175#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 188#L14 assume !(main_~i~0#1 < main_~j~0#1); 174#L19 [2023-02-19 00:16:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2023-02-19 00:16:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550144428] [2023-02-19 00:16:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash 48407, now seen corresponding path program 1 times [2023-02-19 00:16:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246484012] [2023-02-19 00:16:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:13,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,229 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722640, now seen corresponding path program 1 times [2023-02-19 00:16:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:13,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178722562] [2023-02-19 00:16:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:13,241 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:13,242 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:13,242 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:13,242 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:13,242 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-19 00:16:13,242 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,242 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:13,242 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:13,242 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2023-02-19 00:16:13,242 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:13,242 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:13,243 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,244 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,245 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,247 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:13,247 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-19 00:16:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-02-19 00:16:13,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,274 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:13,275 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:13,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2023-02-19 00:16:13,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,279 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-02-19 00:16:13,282 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,282 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:13,304 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:13,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,308 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-02-19 00:16:13,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,312 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2023-02-19 00:16:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,332 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-02-19 00:16:13,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-19 00:16:13,335 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,432 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-19 00:16:13,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,436 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:13,436 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:13,436 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:13,436 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:13,436 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-19 00:16:13,436 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,436 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:13,436 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:13,436 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2023-02-19 00:16:13,436 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:13,437 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:13,438 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,439 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,440 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,442 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:13,442 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-19 00:16:13,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,443 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-02-19 00:16:13,447 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 [2023-02-19 00:16:13,453 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,454 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,454 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,455 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:13,455 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:13,471 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:13,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-02-19 00:16:13,485 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 [2023-02-19 00:16:13,492 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,492 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-19 00:16:13,492 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,492 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,492 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,494 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-19 00:16:13,494 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-19 00:16:13,497 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-19 00:16:13,501 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-02-19 00:16:13,501 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-19 00:16:13,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,503 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-02-19 00:16:13,505 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-19 00:16:13,505 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-19 00:16:13,505 INFO L513 LassoAnalysis]: Proved termination. [2023-02-19 00:16:13,505 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~i~0#1 - 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2023-02-19 00:16:13,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,510 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-19 00:16:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:13,538 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-02-19 00:16:13,538 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,549 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 63 states and 92 transitions. Complement of second has 5 states. [2023-02-19 00:16:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-02-19 00:16:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2023-02-19 00:16:13,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2023-02-19 00:16:13,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2023-02-19 00:16:13,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2023-02-19 00:16:13,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,552 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 92 transitions. [2023-02-19 00:16:13,553 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2023-02-19 00:16:13,554 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 56 states and 81 transitions. [2023-02-19 00:16:13,554 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-02-19 00:16:13,554 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2023-02-19 00:16:13,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 81 transitions. [2023-02-19 00:16:13,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:13,554 INFO L218 hiAutomatonCegarLoop]: Abstraction has 56 states and 81 transitions. [2023-02-19 00:16:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 81 transitions. [2023-02-19 00:16:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2023-02-19 00:16:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 states have internal predecessors, (61), 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) [2023-02-19 00:16:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 61 transitions. [2023-02-19 00:16:13,558 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 61 transitions. [2023-02-19 00:16:13,558 INFO L428 stractBuchiCegarLoop]: Abstraction has 42 states and 61 transitions. [2023-02-19 00:16:13,558 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-19 00:16:13,558 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 61 transitions. [2023-02-19 00:16:13,559 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2023-02-19 00:16:13,559 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:13,559 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:13,559 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2023-02-19 00:16:13,559 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-02-19 00:16:13,560 INFO L748 eck$LassoCheckResult]: Stem: 301#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 302#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 307#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 328#L14 assume !(main_~i~0#1 < main_~j~0#1); 303#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 304#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 316#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 313#L19-2 [2023-02-19 00:16:13,560 INFO L750 eck$LassoCheckResult]: Loop: 313#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 323#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 313#L19-2 [2023-02-19 00:16:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722638, now seen corresponding path program 1 times [2023-02-19 00:16:13,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:13,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549020308] [2023-02-19 00:16:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:13,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-19 00:16:13,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549020308] [2023-02-19 00:16:13,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549020308] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-19 00:16:13,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-19 00:16:13,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-19 00:16:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508306021] [2023-02-19 00:16:13,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-19 00:16:13,597 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-19 00:16:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 2 times [2023-02-19 00:16:13,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:13,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864101039] [2023-02-19 00:16:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:13,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:13,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:13,605 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:13,605 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:13,605 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:13,605 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:13,605 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-19 00:16:13,605 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,605 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:13,605 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:13,605 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2023-02-19 00:16:13,605 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:13,606 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:13,606 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,607 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,608 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,610 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:13,610 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-19 00:16:13,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,611 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-02-19 00:16:13,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:13,649 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:13,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,653 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-02-19 00:16:13,656 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,656 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,677 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-19 00:16:13,677 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-19 00:16:13,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,681 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-19 00:16:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-02-19 00:16:13,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:13,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2023-02-19 00:16:13,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,703 INFO L229 MonitoredProcess]: Starting monitored process 28 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) [2023-02-19 00:16:13,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-02-19 00:16:13,713 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-19 00:16:13,713 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:13,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,748 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 [2023-02-19 00:16:13,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,858 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-19 00:16:13,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2023-02-19 00:16:13,861 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:13,861 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:13,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:13,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:13,862 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-19 00:16:13,862 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,862 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:13,862 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:13,862 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2023-02-19 00:16:13,862 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:13,862 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:13,863 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,865 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,867 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:13,869 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:13,870 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-19 00:16:13,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,878 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2023-02-19 00:16:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-02-19 00:16:13,881 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-19 00:16:13,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:13,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-19 00:16:13,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:13,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:13,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:13,890 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-19 00:16:13,890 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-19 00:16:13,904 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-19 00:16:13,918 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-19 00:16:13,918 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-19 00:16:13,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:13,921 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2023-02-19 00:16:13,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-02-19 00:16:13,924 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-19 00:16:13,924 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-19 00:16:13,924 INFO L513 LassoAnalysis]: Proved termination. [2023-02-19 00:16:13,924 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2023-02-19 00:16:13,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:13,933 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-19 00:16:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:13,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-19 00:16:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:13,961 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-02-19 00:16:13,962 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,973 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 74 states and 105 transitions. Complement of second has 7 states. [2023-02-19 00:16:13,973 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 [2023-02-19 00:16:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-19 00:16:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2023-02-19 00:16:13,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 2 letters. [2023-02-19 00:16:13,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 9 letters. Loop has 2 letters. [2023-02-19 00:16:13,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 4 letters. [2023-02-19 00:16:13,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:13,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 105 transitions. [2023-02-19 00:16:13,976 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2023-02-19 00:16:13,976 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 58 states and 84 transitions. [2023-02-19 00:16:13,976 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2023-02-19 00:16:13,976 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2023-02-19 00:16:13,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 84 transitions. [2023-02-19 00:16:13,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:13,977 INFO L218 hiAutomatonCegarLoop]: Abstraction has 58 states and 84 transitions. [2023-02-19 00:16:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 84 transitions. [2023-02-19 00:16:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2023-02-19 00:16:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 states have internal predecessors, (63), 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) [2023-02-19 00:16:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2023-02-19 00:16:13,979 INFO L240 hiAutomatonCegarLoop]: Abstraction has 43 states and 63 transitions. [2023-02-19 00:16:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-19 00:16:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-19 00:16:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-19 00:16:13,982 INFO L87 Difference]: Start difference. First operand 43 states and 63 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) [2023-02-19 00:16:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-19 00:16:13,992 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-19 00:16:13,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 69 transitions. [2023-02-19 00:16:13,993 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2023-02-19 00:16:13,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 45 states and 62 transitions. [2023-02-19 00:16:13,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2023-02-19 00:16:13,994 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2023-02-19 00:16:13,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 62 transitions. [2023-02-19 00:16:13,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:13,994 INFO L218 hiAutomatonCegarLoop]: Abstraction has 45 states and 62 transitions. [2023-02-19 00:16:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 62 transitions. [2023-02-19 00:16:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-02-19 00:16:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 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) [2023-02-19 00:16:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-02-19 00:16:13,997 INFO L240 hiAutomatonCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-02-19 00:16:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-19 00:16:13,998 INFO L428 stractBuchiCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-02-19 00:16:13,998 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-02-19 00:16:13,998 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 58 transitions. [2023-02-19 00:16:14,000 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2023-02-19 00:16:14,000 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:14,000 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:14,000 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2023-02-19 00:16:14,000 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-19 00:16:14,000 INFO L748 eck$LassoCheckResult]: Stem: 559#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 560#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 564#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 570#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 594#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 565#L14 assume !(main_~i~0#1 < main_~j~0#1); 566#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 562#L19-2 [2023-02-19 00:16:14,000 INFO L750 eck$LassoCheckResult]: Loop: 562#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 593#L14 assume !(main_~i~0#1 < main_~j~0#1); 561#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 562#L19-2 [2023-02-19 00:16:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1810655530, now seen corresponding path program 1 times [2023-02-19 00:16:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:14,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932046822] [2023-02-19 00:16:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-19 00:16:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932046822] [2023-02-19 00:16:14,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932046822] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-19 00:16:14,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-19 00:16:14,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-19 00:16:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739427924] [2023-02-19 00:16:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-19 00:16:14,047 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-19 00:16:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash 40879, now seen corresponding path program 2 times [2023-02-19 00:16:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:14,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975207847] [2023-02-19 00:16:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:14,055 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:14,055 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:14,055 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:14,055 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:14,055 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-19 00:16:14,055 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,055 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:14,056 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:14,056 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2023-02-19 00:16:14,056 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:14,056 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:14,057 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,058 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,059 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,061 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:14,061 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-19 00:16:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:14,062 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2023-02-19 00:16:14,070 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-19 00:16:14,070 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:14,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-02-19 00:16:14,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:14,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:14,110 INFO L229 MonitoredProcess]: Starting monitored process 32 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) [2023-02-19 00:16:14,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-19 00:16:14,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-19 00:16:14,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-02-19 00:16:14,143 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-19 00:16:14,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:14,147 INFO L210 LassoAnalysis]: Preferences: [2023-02-19 00:16:14,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-19 00:16:14,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-19 00:16:14,147 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-19 00:16:14,147 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-19 00:16:14,147 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,147 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-19 00:16:14,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-19 00:16:14,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2023-02-19 00:16:14,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-19 00:16:14,147 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-19 00:16:14,148 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,154 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,155 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-19 00:16:14,160 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-19 00:16:14,160 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-19 00:16:14,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:14,162 INFO L229 MonitoredProcess]: Starting monitored process 33 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) [2023-02-19 00:16:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-02-19 00:16:14,178 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 [2023-02-19 00:16:14,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:14,185 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:14,185 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:14,185 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:14,190 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-19 00:16:14,190 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-19 00:16:14,200 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-19 00:16:14,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:14,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:14,205 INFO L229 MonitoredProcess]: Starting monitored process 34 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) [2023-02-19 00:16:14,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-02-19 00:16:14,209 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 [2023-02-19 00:16:14,215 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-19 00:16:14,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-19 00:16:14,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-19 00:16:14,215 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-19 00:16:14,215 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-19 00:16:14,216 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-19 00:16:14,216 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-19 00:16:14,218 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-19 00:16:14,220 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-19 00:16:14,220 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-19 00:16:14,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-19 00:16:14,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-19 00:16:14,221 INFO L229 MonitoredProcess]: Starting monitored process 35 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) [2023-02-19 00:16:14,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-02-19 00:16:14,224 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-19 00:16:14,224 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-19 00:16:14,224 INFO L513 LassoAnalysis]: Proved termination. [2023-02-19 00:16:14,224 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2023-02-19 00:16:14,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:14,228 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-19 00:16:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-19 00:16:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-19 00:16:14,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-19 00:16:14,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-19 00:16:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-19 00:16:14,265 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-02-19 00:16:14,265 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-02-19 00:16:14,276 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 74 states and 102 transitions. Complement of second has 5 states. [2023-02-19 00:16:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-02-19 00:16:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-02-19 00:16:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2023-02-19 00:16:14,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2023-02-19 00:16:14,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:14,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 3 letters. [2023-02-19 00:16:14,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:14,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 6 letters. [2023-02-19 00:16:14,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-19 00:16:14,277 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 102 transitions. [2023-02-19 00:16:14,278 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-19 00:16:14,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 57 states and 79 transitions. [2023-02-19 00:16:14,279 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2023-02-19 00:16:14,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2023-02-19 00:16:14,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 79 transitions. [2023-02-19 00:16:14,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:14,279 INFO L218 hiAutomatonCegarLoop]: Abstraction has 57 states and 79 transitions. [2023-02-19 00:16:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 79 transitions. [2023-02-19 00:16:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2023-02-19 00:16:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 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) [2023-02-19 00:16:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2023-02-19 00:16:14,281 INFO L240 hiAutomatonCegarLoop]: Abstraction has 49 states and 69 transitions. [2023-02-19 00:16:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-19 00:16:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-19 00:16:14,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-19 00:16:14,282 INFO L87 Difference]: Start difference. First operand 49 states and 69 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) [2023-02-19 00:16:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-19 00:16:14,292 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-02-19 00:16:14,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 66 transitions. [2023-02-19 00:16:14,293 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-02-19 00:16:14,293 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 47 states and 61 transitions. [2023-02-19 00:16:14,293 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2023-02-19 00:16:14,293 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2023-02-19 00:16:14,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 61 transitions. [2023-02-19 00:16:14,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-19 00:16:14,293 INFO L218 hiAutomatonCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-19 00:16:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 61 transitions. [2023-02-19 00:16:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-02-19 00:16:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 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) [2023-02-19 00:16:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-02-19 00:16:14,297 INFO L240 hiAutomatonCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-02-19 00:16:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-19 00:16:14,298 INFO L428 stractBuchiCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-02-19 00:16:14,298 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-02-19 00:16:14,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 47 transitions. [2023-02-19 00:16:14,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-02-19 00:16:14,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-19 00:16:14,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-19 00:16:14,299 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2023-02-19 00:16:14,299 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2023-02-19 00:16:14,299 INFO L748 eck$LassoCheckResult]: Stem: 823#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 824#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 825#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 834#L14 assume !(main_~i~0#1 < main_~j~0#1); 832#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 848#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 830#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 819#L19-2 [2023-02-19 00:16:14,299 INFO L750 eck$LassoCheckResult]: Loop: 819#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 820#L14 assume !(main_~i~0#1 < main_~j~0#1); 826#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 827#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 853#L14 assume !(main_~i~0#1 < main_~j~0#1); 850#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 851#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 852#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 819#L19-2 [2023-02-19 00:16:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1810724560, now seen corresponding path program 2 times [2023-02-19 00:16:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040279101] [2023-02-19 00:16:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2053356838, now seen corresponding path program 1 times [2023-02-19 00:16:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714248688] [2023-02-19 00:16:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-19 00:16:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 399570165, now seen corresponding path program 1 times [2023-02-19 00:16:14,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-19 00:16:14,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291765087] [2023-02-19 00:16:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-19 00:16:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-19 00:16:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,352 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-19 00:16:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-19 00:16:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-19 00:16:14,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.02 12:16:14 BoogieIcfgContainer [2023-02-19 00:16:14,384 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-19 00:16:14,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-19 00:16:14,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-19 00:16:14,385 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-19 00:16:14,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 12:16:11" (3/4) ... [2023-02-19 00:16:14,386 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-19 00:16:14,405 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-19 00:16:14,405 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-19 00:16:14,406 INFO L158 Benchmark]: Toolchain (without parser) took 2889.98ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 101.5MB in the beginning and 104.6MB in the end (delta: -3.0MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,406 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 132.1MB. Free memory is still 105.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-19 00:16:14,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.79ms. Allocated memory is still 132.1MB. Free memory was 101.1MB in the beginning and 92.1MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,406 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.31ms. Allocated memory is still 132.1MB. Free memory was 92.1MB in the beginning and 90.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-19 00:16:14,406 INFO L158 Benchmark]: Boogie Preprocessor took 10.34ms. Allocated memory is still 132.1MB. Free memory was 90.7MB in the beginning and 90.0MB in the end (delta: 724.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,406 INFO L158 Benchmark]: RCFGBuilder took 185.33ms. Allocated memory is still 132.1MB. Free memory was 89.5MB in the beginning and 81.6MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,407 INFO L158 Benchmark]: BuchiAutomizer took 2519.66ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 81.6MB in the beginning and 105.7MB in the end (delta: -24.1MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,407 INFO L158 Benchmark]: Witness Printer took 20.98ms. Allocated memory is still 180.4MB. Free memory was 105.7MB in the beginning and 104.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-19 00:16:14,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 132.1MB. Free memory is still 105.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.79ms. Allocated memory is still 132.1MB. Free memory was 101.1MB in the beginning and 92.1MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.31ms. Allocated memory is still 132.1MB. Free memory was 92.1MB in the beginning and 90.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 10.34ms. Allocated memory is still 132.1MB. Free memory was 90.7MB in the beginning and 90.0MB in the end (delta: 724.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 185.33ms. Allocated memory is still 132.1MB. Free memory was 89.5MB in the beginning and 81.6MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 2519.66ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 81.6MB in the beginning and 105.7MB in the end (delta: -24.1MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. * Witness Printer took 20.98ms. Allocated memory is still 180.4MB. Free memory was 105.7MB in the beginning and 104.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 7 terminating modules (2 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function j and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i + -1 * j and consists of 3 locations. One deterministic module has affine ranking function j and consists of 4 locations. One deterministic module has affine ranking function i and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 35 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 2.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 81 IncrementalHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 39 mSDtfsCounter, 81 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax160 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq139 hnf93 smp100 dnf100 smp100 tf107 neg96 sie119 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 50ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 VAL [t=0] [L13] COND TRUE i > 0 && j > 0 VAL [i=2, j=2, t=0] [L14] COND FALSE !(i < j) VAL [i=2, j=2, t=0] [L19] COND FALSE !(i > j) [L22] i = i-1 VAL [i=1, j=2, t=0] [L13] COND TRUE i > 0 && j > 0 VAL [i=1, j=2, t=0] [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t VAL [i=2, j=1, t=1] Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 VAL [t=0] [L13] COND TRUE i > 0 && j > 0 VAL [i=2, j=2, t=0] [L14] COND FALSE !(i < j) VAL [i=2, j=2, t=0] [L19] COND FALSE !(i > j) [L22] i = i-1 VAL [i=1, j=2, t=0] [L13] COND TRUE i > 0 && j > 0 VAL [i=1, j=2, t=0] [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t VAL [i=2, j=1, t=1] Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-02-19 00:16:14,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-02-19 00:16:14,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2023-02-19 00:16:14,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)