./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Narrowing.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a31fd051 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/Narrowing.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 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 14:15:50,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 14:15:50,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 14:15:50,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 14:15:50,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 14:15:50,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 14:15:50,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 14:15:50,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 14:15:50,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 14:15:50,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 14:15:50,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 14:15:50,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 14:15:50,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 14:15:50,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 14:15:50,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 14:15:50,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 14:15:50,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 14:15:50,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 14:15:50,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 14:15:50,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 14:15:50,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 14:15:50,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 14:15:50,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 14:15:50,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 14:15:50,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 14:15:50,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 14:15:50,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 14:15:50,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 14:15:50,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 14:15:50,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 14:15:50,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 14:15:50,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 14:15:50,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 14:15:50,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 14:15:50,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 14:15:50,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 14:15:50,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 14:15:50,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 14:15:50,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 14:15:50,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 14:15:50,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 14:15:50,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 14:15:50,563 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 14:15:50,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 14:15:50,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 14:15:50,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 14:15:50,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 14:15:50,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 14:15:50,565 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 14:15:50,565 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 14:15:50,565 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 14:15:50,565 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 14:15:50,566 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 14:15:50,566 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 14:15:50,566 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 14:15:50,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 14:15:50,567 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 14:15:50,568 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 14:15:50,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 14:15:50,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 14:15:50,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 14:15:50,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 14:15:50,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 14:15:50,570 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 14:15:50,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac [2023-02-15 14:15:50,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 14:15:50,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 14:15:50,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 14:15:50,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 14:15:50,783 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 14:15:50,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Narrowing.c [2023-02-15 14:15:51,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 14:15:51,864 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 14:15:51,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Narrowing.c [2023-02-15 14:15:51,868 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03aa5377/a1c46ef38e3043d9b1a8a58853867ce1/FLAG4fcb8c873 [2023-02-15 14:15:51,892 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03aa5377/a1c46ef38e3043d9b1a8a58853867ce1 [2023-02-15 14:15:51,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 14:15:51,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 14:15:51,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 14:15:51,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 14:15:51,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 14:15:51,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:51" (1/1) ... [2023-02-15 14:15:51,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256e5fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:51, skipping insertion in model container [2023-02-15 14:15:51,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:51" (1/1) ... [2023-02-15 14:15:51,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 14:15:51,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 14:15:52,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:15:52,030 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 14:15:52,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:15:52,054 INFO L208 MainTranslator]: Completed translation [2023-02-15 14:15:52,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52 WrapperNode [2023-02-15 14:15:52,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 14:15:52,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 14:15:52,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 14:15:52,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 14:15:52,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,078 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2023-02-15 14:15:52,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 14:15:52,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 14:15:52,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 14:15:52,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 14:15:52,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 14:15:52,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 14:15:52,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 14:15:52,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 14:15:52,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (1/1) ... [2023-02-15 14:15:52,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:52,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:52,115 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) [2023-02-15 14:15:52,119 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 [2023-02-15 14:15:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 14:15:52,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 14:15:52,195 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 14:15:52,197 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 14:15:52,286 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 14:15:52,290 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 14:15:52,290 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 14:15:52,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:52 BoogieIcfgContainer [2023-02-15 14:15:52,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 14:15:52,293 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 14:15:52,294 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 14:15:52,296 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 14:15:52,297 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:52,297 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 02:15:51" (1/3) ... [2023-02-15 14:15:52,298 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f1ada74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:15:52, skipping insertion in model container [2023-02-15 14:15:52,298 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:52,298 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:52" (2/3) ... [2023-02-15 14:15:52,298 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f1ada74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:15:52, skipping insertion in model container [2023-02-15 14:15:52,299 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:52,299 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:52" (3/3) ... [2023-02-15 14:15:52,300 INFO L332 chiAutomizerObserver]: Analyzing ICFG Narrowing.c [2023-02-15 14:15:52,360 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 14:15:52,360 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 14:15:52,361 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 14:15:52,361 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 14:15:52,361 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 14:15:52,361 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 14:15:52,361 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 14:15:52,361 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 14:15:52,365 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:52,377 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-02-15 14:15:52,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:52,377 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:52,381 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:52,381 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:52,381 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 14:15:52,382 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:52,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-02-15 14:15:52,383 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:52,383 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:52,384 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:52,384 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:52,391 INFO L748 eck$LassoCheckResult]: Stem: 6#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 4#L26-1true [2023-02-15 14:15:52,392 INFO L750 eck$LassoCheckResult]: Loop: 4#L26-1true assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 11#L14true assume !(0 == main_~i~0#1); 12#L14-2true assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 9#L17-1true assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 7#L20-1true assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 10#L23-1true assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4#L26-1true [2023-02-15 14:15:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-02-15 14:15:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941051289] [2023-02-15 14:15:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1217822514, now seen corresponding path program 1 times [2023-02-15 14:15:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619402054] [2023-02-15 14:15:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:52,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619402054] [2023-02-15 14:15:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619402054] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:15:52,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:15:52,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 14:15:52,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982366850] [2023-02-15 14:15:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:15:52,587 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 14:15:52,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 14:15:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 14:15:52,614 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:52,645 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2023-02-15 14:15:52,646 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2023-02-15 14:15:52,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2023-02-15 14:15:52,649 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 14 states and 23 transitions. [2023-02-15 14:15:52,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2023-02-15 14:15:52,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2023-02-15 14:15:52,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 23 transitions. [2023-02-15 14:15:52,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:15:52,651 INFO L218 hiAutomatonCegarLoop]: Abstraction has 14 states and 23 transitions. [2023-02-15 14:15:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 23 transitions. [2023-02-15 14:15:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-15 14:15:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-02-15 14:15:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 23 transitions. [2023-02-15 14:15:52,670 INFO L240 hiAutomatonCegarLoop]: Abstraction has 14 states and 23 transitions. [2023-02-15 14:15:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 14:15:52,679 INFO L428 stractBuchiCegarLoop]: Abstraction has 14 states and 23 transitions. [2023-02-15 14:15:52,679 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-15 14:15:52,679 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 23 transitions. [2023-02-15 14:15:52,680 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2023-02-15 14:15:52,680 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:52,680 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:52,681 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:52,681 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:52,681 INFO L748 eck$LassoCheckResult]: Stem: 45#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 46#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 50#L26-1 [2023-02-15 14:15:52,681 INFO L750 eck$LassoCheckResult]: Loop: 50#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 56#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 53#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 51#L17-1 assume !(1 == main_~up~0#1); 52#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 48#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 50#L26-1 [2023-02-15 14:15:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2023-02-15 14:15:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128871570] [2023-02-15 14:15:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,708 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1215977394, now seen corresponding path program 1 times [2023-02-15 14:15:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905417074] [2023-02-15 14:15:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905417074] [2023-02-15 14:15:52,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905417074] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:15:52,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:15:52,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 14:15:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258941648] [2023-02-15 14:15:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:15:52,788 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 14:15:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 14:15:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 14:15:52,789 INFO L87 Difference]: Start difference. First operand 14 states and 23 transitions. cyclomatic complexity: 10 Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:52,837 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2023-02-15 14:15:52,837 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 61 transitions. [2023-02-15 14:15:52,839 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2023-02-15 14:15:52,840 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 38 states and 61 transitions. [2023-02-15 14:15:52,841 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2023-02-15 14:15:52,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2023-02-15 14:15:52,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 61 transitions. [2023-02-15 14:15:52,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:15:52,841 INFO L218 hiAutomatonCegarLoop]: Abstraction has 38 states and 61 transitions. [2023-02-15 14:15:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 61 transitions. [2023-02-15 14:15:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-15 14:15:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 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) [2023-02-15 14:15:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 61 transitions. [2023-02-15 14:15:52,849 INFO L240 hiAutomatonCegarLoop]: Abstraction has 38 states and 61 transitions. [2023-02-15 14:15:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 14:15:52,850 INFO L428 stractBuchiCegarLoop]: Abstraction has 38 states and 61 transitions. [2023-02-15 14:15:52,850 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-15 14:15:52,850 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 38 states and 61 transitions. [2023-02-15 14:15:52,851 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2023-02-15 14:15:52,853 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:52,853 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:52,854 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:52,854 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:52,854 INFO L748 eck$LassoCheckResult]: Stem: 104#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 105#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 109#L26-1 [2023-02-15 14:15:52,854 INFO L750 eck$LassoCheckResult]: Loop: 109#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 126#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 123#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 120#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 121#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 118#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 109#L26-1 [2023-02-15 14:15:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2023-02-15 14:15:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615174007] [2023-02-15 14:15:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,862 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1216035056, now seen corresponding path program 1 times [2023-02-15 14:15:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218782548] [2023-02-15 14:15:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218782548] [2023-02-15 14:15:52,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218782548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:15:52,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:15:52,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 14:15:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078015913] [2023-02-15 14:15:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:15:52,905 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 14:15:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 14:15:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 14:15:52,906 INFO L87 Difference]: Start difference. First operand 38 states and 61 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:52,922 INFO L93 Difference]: Finished difference Result 38 states and 58 transitions. [2023-02-15 14:15:52,922 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 58 transitions. [2023-02-15 14:15:52,923 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2023-02-15 14:15:52,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 38 states and 58 transitions. [2023-02-15 14:15:52,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2023-02-15 14:15:52,924 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2023-02-15 14:15:52,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 58 transitions. [2023-02-15 14:15:52,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:15:52,925 INFO L218 hiAutomatonCegarLoop]: Abstraction has 38 states and 58 transitions. [2023-02-15 14:15:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 58 transitions. [2023-02-15 14:15:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-02-15 14:15:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 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) [2023-02-15 14:15:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2023-02-15 14:15:52,928 INFO L240 hiAutomatonCegarLoop]: Abstraction has 32 states and 49 transitions. [2023-02-15 14:15:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 14:15:52,929 INFO L428 stractBuchiCegarLoop]: Abstraction has 32 states and 49 transitions. [2023-02-15 14:15:52,929 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-15 14:15:52,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 32 states and 49 transitions. [2023-02-15 14:15:52,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 30 [2023-02-15 14:15:52,930 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:52,930 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:52,930 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:52,930 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:52,930 INFO L748 eck$LassoCheckResult]: Stem: 186#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 187#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 190#L26-1 [2023-02-15 14:15:52,931 INFO L750 eck$LassoCheckResult]: Loop: 190#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 201#L14 assume !(0 == main_~i~0#1); 207#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 205#L17-1 assume !(1 == main_~up~0#1); 204#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 202#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 190#L26-1 [2023-02-15 14:15:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2023-02-15 14:15:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915650896] [2023-02-15 14:15:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1217884020, now seen corresponding path program 1 times [2023-02-15 14:15:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101292766] [2023-02-15 14:15:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 297933238, now seen corresponding path program 1 times [2023-02-15 14:15:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:52,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725197108] [2023-02-15 14:15:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:52,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,014 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:53,015 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:53,015 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:53,015 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:53,015 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:15:53,015 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,015 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:53,015 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:53,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2023-02-15 14:15:53,017 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:53,018 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:53,028 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,043 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,048 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,065 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,136 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:53,136 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:15:53,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,147 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) [2023-02-15 14:15:53,160 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:53,160 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:53,168 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 [2023-02-15 14:15:53,190 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:15:53,190 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: [] [2023-02-15 14:15:53,199 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 [2023-02-15 14:15:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,201 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) [2023-02-15 14:15:53,204 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 [2023-02-15 14:15:53,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:53,205 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:53,217 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:15:53,217 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: [] [2023-02-15 14:15:53,222 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 [2023-02-15 14:15:53,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,223 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) [2023-02-15 14:15:53,223 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 [2023-02-15 14:15:53,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:53,226 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:53,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-02-15 14:15:53,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,247 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) [2023-02-15 14:15:53,248 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 [2023-02-15 14:15:53,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:15:53,250 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:53,270 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:15:53,275 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 [2023-02-15 14:15:53,276 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:53,276 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:53,276 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:53,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:53,276 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:15:53,276 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:53,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:53,276 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2023-02-15 14:15:53,276 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:53,276 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:53,277 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,284 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,296 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,299 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:53,362 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:15:53,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,364 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) [2023-02-15 14:15:53,371 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 [2023-02-15 14:15:53,377 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 [2023-02-15 14:15:53,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:53,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:53,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:15:53,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:53,381 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-15 14:15:53,381 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-15 14:15:53,398 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:15:53,402 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 [2023-02-15 14:15:53,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,404 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) [2023-02-15 14:15:53,407 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 [2023-02-15 14:15:53,409 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 [2023-02-15 14:15:53,415 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:53,415 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:15:53,415 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:53,415 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:15:53,415 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:53,416 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:15:53,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:15:53,432 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:15:53,435 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:15:53,435 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-15 14:15:53,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:53,481 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) [2023-02-15 14:15:53,483 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 [2023-02-15 14:15:53,485 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:15:53,485 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:15:53,485 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:15:53,485 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 [] [2023-02-15 14:15:53,490 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 [2023-02-15 14:15:53,493 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:15:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:53,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 14:15:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:15:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:53,599 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:15:53,600 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 32 states and 49 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-15 14:15:53,654 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 32 states and 49 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 100 states and 152 transitions. Complement of second has 7 states. [2023-02-15 14:15:53,655 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 [2023-02-15 14:15:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-15 14:15:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-02-15 14:15:53,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 6 letters. [2023-02-15 14:15:53,660 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:53,660 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 8 letters. Loop has 6 letters. [2023-02-15 14:15:53,660 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:53,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 12 letters. [2023-02-15 14:15:53,661 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:53,661 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 152 transitions. [2023-02-15 14:15:53,667 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 60 [2023-02-15 14:15:53,669 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 100 states and 152 transitions. [2023-02-15 14:15:53,671 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2023-02-15 14:15:53,672 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2023-02-15 14:15:53,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 152 transitions. [2023-02-15 14:15:53,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:53,673 INFO L218 hiAutomatonCegarLoop]: Abstraction has 100 states and 152 transitions. [2023-02-15 14:15:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states and 152 transitions. [2023-02-15 14:15:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2023-02-15 14:15:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 89 states have (on average 1.550561797752809) internal successors, (138), 88 states have internal predecessors, (138), 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) [2023-02-15 14:15:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 138 transitions. [2023-02-15 14:15:53,685 INFO L240 hiAutomatonCegarLoop]: Abstraction has 89 states and 138 transitions. [2023-02-15 14:15:53,685 INFO L428 stractBuchiCegarLoop]: Abstraction has 89 states and 138 transitions. [2023-02-15 14:15:53,685 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-02-15 14:15:53,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 138 transitions. [2023-02-15 14:15:53,686 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 54 [2023-02-15 14:15:53,687 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:53,687 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:53,688 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 14:15:53,689 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:53,689 INFO L748 eck$LassoCheckResult]: Stem: 367#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 368#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 378#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 386#L14 [2023-02-15 14:15:53,689 INFO L750 eck$LassoCheckResult]: Loop: 386#L14 assume !(0 == main_~i~0#1); 437#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 433#L17-1 assume !(1 == main_~up~0#1); 430#L20-1 assume !(0 == main_~up~0#1); 426#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 425#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 386#L14 [2023-02-15 14:15:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2023-02-15 14:15:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899048750] [2023-02-15 14:15:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1366755632, now seen corresponding path program 1 times [2023-02-15 14:15:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125833111] [2023-02-15 14:15:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 645997719, now seen corresponding path program 1 times [2023-02-15 14:15:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212958968] [2023-02-15 14:15:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:53,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212958968] [2023-02-15 14:15:53,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212958968] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:15:53,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:15:53,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 14:15:53,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467835409] [2023-02-15 14:15:53,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:15:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 14:15:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 14:15:53,778 INFO L87 Difference]: Start difference. First operand 89 states and 138 transitions. cyclomatic complexity: 54 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) [2023-02-15 14:15:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:53,792 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2023-02-15 14:15:53,792 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 112 transitions. [2023-02-15 14:15:53,793 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 38 [2023-02-15 14:15:53,796 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 71 states and 102 transitions. [2023-02-15 14:15:53,796 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2023-02-15 14:15:53,797 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2023-02-15 14:15:53,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 102 transitions. [2023-02-15 14:15:53,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:53,797 INFO L218 hiAutomatonCegarLoop]: Abstraction has 71 states and 102 transitions. [2023-02-15 14:15:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 102 transitions. [2023-02-15 14:15:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-02-15 14:15:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 64 states have internal predecessors, (94), 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) [2023-02-15 14:15:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 94 transitions. [2023-02-15 14:15:53,805 INFO L240 hiAutomatonCegarLoop]: Abstraction has 65 states and 94 transitions. [2023-02-15 14:15:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 14:15:53,809 INFO L428 stractBuchiCegarLoop]: Abstraction has 65 states and 94 transitions. [2023-02-15 14:15:53,809 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-02-15 14:15:53,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 65 states and 94 transitions. [2023-02-15 14:15:53,811 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 35 [2023-02-15 14:15:53,811 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:53,811 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:53,811 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-02-15 14:15:53,811 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:53,811 INFO L748 eck$LassoCheckResult]: Stem: 541#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 542#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 552#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 570#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 584#L14-2 [2023-02-15 14:15:53,811 INFO L750 eck$LassoCheckResult]: Loop: 584#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 595#L17-1 assume !(1 == main_~up~0#1); 593#L20-1 assume !(0 == main_~up~0#1); 590#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 537#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 538#L14 assume !(0 == main_~i~0#1); 584#L14-2 [2023-02-15 14:15:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2023-02-15 14:15:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383532135] [2023-02-15 14:15:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,816 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1544255282, now seen corresponding path program 2 times [2023-02-15 14:15:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113505101] [2023-02-15 14:15:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,821 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1071052759, now seen corresponding path program 1 times [2023-02-15 14:15:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441193293] [2023-02-15 14:15:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:53,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441193293] [2023-02-15 14:15:53,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441193293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:15:53,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:15:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 14:15:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517955685] [2023-02-15 14:15:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:15:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 14:15:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 14:15:53,873 INFO L87 Difference]: Start difference. First operand 65 states and 94 transitions. cyclomatic complexity: 33 Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:53,880 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-15 14:15:53,880 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 66 transitions. [2023-02-15 14:15:53,880 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2023-02-15 14:15:53,880 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 47 states and 64 transitions. [2023-02-15 14:15:53,881 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2023-02-15 14:15:53,881 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2023-02-15 14:15:53,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 64 transitions. [2023-02-15 14:15:53,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:53,881 INFO L218 hiAutomatonCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-02-15 14:15:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 64 transitions. [2023-02-15 14:15:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-02-15 14:15:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 41 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) [2023-02-15 14:15:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2023-02-15 14:15:53,890 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 58 transitions. [2023-02-15 14:15:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 14:15:53,892 INFO L428 stractBuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2023-02-15 14:15:53,893 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-02-15 14:15:53,893 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2023-02-15 14:15:53,893 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2023-02-15 14:15:53,893 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:53,893 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:53,893 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2023-02-15 14:15:53,893 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:53,893 INFO L748 eck$LassoCheckResult]: Stem: 663#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 664#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 676#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 677#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 678#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 685#L17-1 [2023-02-15 14:15:53,893 INFO L750 eck$LassoCheckResult]: Loop: 685#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 665#L20-1 assume !(0 == main_~up~0#1); 666#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 691#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 689#L14 assume !(0 == main_~i~0#1); 687#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 685#L17-1 [2023-02-15 14:15:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash 28699760, now seen corresponding path program 1 times [2023-02-15 14:15:53,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883622480] [2023-02-15 14:15:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1664464050, now seen corresponding path program 1 times [2023-02-15 14:15:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401780652] [2023-02-15 14:15:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1214361119, now seen corresponding path program 1 times [2023-02-15 14:15:53,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:53,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361662674] [2023-02-15 14:15:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:53,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:53,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:53,929 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 [2023-02-15 14:15:53,969 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:53,969 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:53,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:53,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:53,969 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:15:53,969 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:53,969 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:53,969 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:53,969 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2023-02-15 14:15:53,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:53,970 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:53,971 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,980 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,983 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:53,986 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,083 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:54,084 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:15:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,085 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) [2023-02-15 14:15:54,087 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 [2023-02-15 14:15:54,089 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:54,089 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,116 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:15:54,116 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: [] [2023-02-15 14:15:54,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-02-15 14:15:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,122 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) [2023-02-15 14:15:54,130 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 [2023-02-15 14:15:54,132 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:54,133 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:15:54,149 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: [] [2023-02-15 14:15:54,156 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 [2023-02-15 14:15:54,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,157 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) [2023-02-15 14:15:54,157 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 [2023-02-15 14:15:54,160 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:54,160 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,167 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:15:54,167 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0#1=1} Honda state: {ULTIMATE.start_main_~up~0#1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 14:15:54,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2023-02-15 14:15:54,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,171 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) [2023-02-15 14:15:54,172 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 [2023-02-15 14:15:54,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:54,174 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,191 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 [2023-02-15 14:15:54,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,205 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) [2023-02-15 14:15:54,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:15:54,207 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,224 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 [2023-02-15 14:15:54,372 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:15:54,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:54,376 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:54,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:54,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:54,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:54,376 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:15:54,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:54,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:54,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2023-02-15 14:15:54,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:54,376 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:54,377 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,380 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,382 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,384 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,462 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:54,462 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:15:54,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,463 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) [2023-02-15 14:15:54,465 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 [2023-02-15 14:15:54,467 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 [2023-02-15 14:15:54,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:54,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:54,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:15:54,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:54,474 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-15 14:15:54,474 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-15 14:15:54,484 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:15:54,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2023-02-15 14:15:54,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,488 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) [2023-02-15 14:15:54,490 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 [2023-02-15 14:15:54,492 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 [2023-02-15 14:15:54,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:54,498 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:54,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:15:54,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:54,499 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-02-15 14:15:54,499 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-02-15 14:15:54,512 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:15:54,517 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 [2023-02-15 14:15:54,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,518 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) [2023-02-15 14:15:54,521 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 [2023-02-15 14:15:54,523 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 [2023-02-15 14:15:54,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:54,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:15:54,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:54,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:15:54,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:54,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:15:54,530 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:15:54,545 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:15:54,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:54,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,553 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) [2023-02-15 14:15:54,557 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 [2023-02-15 14:15:54,559 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 [2023-02-15 14:15:54,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:54,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:15:54,567 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:54,567 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-02-15 14:15:54,567 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:54,568 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2023-02-15 14:15:54,568 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:15:54,580 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:15:54,586 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-02-15 14:15:54,586 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-15 14:15:54,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,588 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) [2023-02-15 14:15:54,592 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 [2023-02-15 14:15:54,594 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:15:54,594 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:15:54,594 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:15:54,595 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0#1, ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~range~0#1 - 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2023-02-15 14:15:54,599 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 [2023-02-15 14:15:54,600 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:15:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 14:15:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 14:15:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:54,661 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:15:54,662 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:54,684 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 91 states and 124 transitions. Complement of second has 7 states. [2023-02-15 14:15:54,685 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 [2023-02-15 14:15:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2023-02-15 14:15:54,685 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 5 letters. Loop has 6 letters. [2023-02-15 14:15:54,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:54,686 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 11 letters. Loop has 6 letters. [2023-02-15 14:15:54,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:54,686 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 5 letters. Loop has 12 letters. [2023-02-15 14:15:54,686 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:54,686 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 124 transitions. [2023-02-15 14:15:54,687 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2023-02-15 14:15:54,688 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 78 states and 107 transitions. [2023-02-15 14:15:54,688 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2023-02-15 14:15:54,688 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2023-02-15 14:15:54,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 107 transitions. [2023-02-15 14:15:54,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:54,688 INFO L218 hiAutomatonCegarLoop]: Abstraction has 78 states and 107 transitions. [2023-02-15 14:15:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states and 107 transitions. [2023-02-15 14:15:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-15 14:15:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 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) [2023-02-15 14:15:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2023-02-15 14:15:54,691 INFO L240 hiAutomatonCegarLoop]: Abstraction has 72 states and 101 transitions. [2023-02-15 14:15:54,691 INFO L428 stractBuchiCegarLoop]: Abstraction has 72 states and 101 transitions. [2023-02-15 14:15:54,691 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-02-15 14:15:54,691 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 72 states and 101 transitions. [2023-02-15 14:15:54,691 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2023-02-15 14:15:54,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:54,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:54,692 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:15:54,692 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-02-15 14:15:54,692 INFO L748 eck$LassoCheckResult]: Stem: 853#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 854#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 865#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 905#L14 assume !(0 == main_~i~0#1); 906#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 863#L17-1 assume !(1 == main_~up~0#1); 864#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 896#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 898#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 919#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 918#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 917#L17-1 [2023-02-15 14:15:54,692 INFO L750 eck$LassoCheckResult]: Loop: 917#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 916#L20-1 assume !(0 == main_~up~0#1); 859#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 860#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 884#L14 assume !(0 == main_~i~0#1); 882#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 917#L17-1 [2023-02-15 14:15:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1968356129, now seen corresponding path program 1 times [2023-02-15 14:15:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:54,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198064382] [2023-02-15 14:15:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:54,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:54,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:54,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198064382] [2023-02-15 14:15:54,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198064382] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:15:54,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195665911] [2023-02-15 14:15:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:54,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:15:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,715 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:15:54,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 14:15:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:54,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 14:15:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:54,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:15:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195665911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:15:54,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:15:54,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-02-15 14:15:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668238003] [2023-02-15 14:15:54,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:15:54,772 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 14:15:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1664464050, now seen corresponding path program 2 times [2023-02-15 14:15:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411525182] [2023-02-15 14:15:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:54,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:54,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:54,807 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:54,808 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:54,808 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:54,808 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:54,808 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:15:54,808 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,808 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:54,808 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:54,808 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2023-02-15 14:15:54,808 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:54,808 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:54,809 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,816 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,818 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,820 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:54,902 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:54,902 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:15:54,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,904 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) [2023-02-15 14:15:54,911 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 [2023-02-15 14:15:54,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:15:54,912 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:54,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:54,939 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) [2023-02-15 14:15:54,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:15:54,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:15:54,958 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 [2023-02-15 14:15:55,113 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:15:55,117 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 [2023-02-15 14:15:55,121 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:15:55,121 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:15:55,121 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:15:55,121 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:15:55,121 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:15:55,121 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:55,121 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:15:55,121 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:15:55,121 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2023-02-15 14:15:55,121 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:15:55,121 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:15:55,122 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:55,132 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:55,134 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:55,135 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:15:55,206 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:15:55,206 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:15:55,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:55,207 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) [2023-02-15 14:15:55,209 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 [2023-02-15 14:15:55,211 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 [2023-02-15 14:15:55,218 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:15:55,218 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:15:55,218 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:15:55,218 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-02-15 14:15:55,218 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:15:55,219 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2023-02-15 14:15:55,219 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:15:55,234 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:15:55,237 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-02-15 14:15:55,237 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-15 14:15:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:55,240 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) [2023-02-15 14:15:55,250 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 [2023-02-15 14:15:55,250 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:15:55,250 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:15:55,250 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:15:55,250 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~range~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~range~0#1 Supporting invariants [] [2023-02-15 14:15:55,254 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 [2023-02-15 14:15:55,254 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:15:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,327 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 [2023-02-15 14:15:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,331 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:15:55,332 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:55,362 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 96 states and 136 transitions. Complement of second has 7 states. [2023-02-15 14:15:55,363 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 [2023-02-15 14:15:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2023-02-15 14:15:55,365 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 11 letters. Loop has 6 letters. [2023-02-15 14:15:55,365 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:55,365 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:15:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,425 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:15:55,426 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,458 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 125 states and 174 transitions. Complement of second has 9 states. [2023-02-15 14:15:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2023-02-15 14:15:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2023-02-15 14:15:55,460 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 31 transitions. Stem has 11 letters. Loop has 6 letters. [2023-02-15 14:15:55,460 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:55,460 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:15:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,510 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:15:55,510 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,529 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 113 states and 165 transitions. Complement of second has 8 states. [2023-02-15 14:15:55,529 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 [2023-02-15 14:15:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 29 transitions. [2023-02-15 14:15:55,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 11 letters. Loop has 6 letters. [2023-02-15 14:15:55,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:55,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 17 letters. Loop has 6 letters. [2023-02-15 14:15:55,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:55,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 11 letters. Loop has 12 letters. [2023-02-15 14:15:55,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:15:55,530 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 113 states and 165 transitions. [2023-02-15 14:15:55,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2023-02-15 14:15:55,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 113 states to 85 states and 121 transitions. [2023-02-15 14:15:55,532 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2023-02-15 14:15:55,532 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-02-15 14:15:55,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 121 transitions. [2023-02-15 14:15:55,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:55,532 INFO L218 hiAutomatonCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-15 14:15:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 121 transitions. [2023-02-15 14:15:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2023-02-15 14:15:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 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) [2023-02-15 14:15:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 73 transitions. [2023-02-15 14:15:55,534 INFO L240 hiAutomatonCegarLoop]: Abstraction has 50 states and 73 transitions. [2023-02-15 14:15:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 14:15:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 14:15:55,534 INFO L87 Difference]: Start difference. First operand 50 states and 73 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-02-15 14:15:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:55,594 INFO L93 Difference]: Finished difference Result 209 states and 277 transitions. [2023-02-15 14:15:55,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 209 states and 277 transitions. [2023-02-15 14:15:55,596 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 82 [2023-02-15 14:15:55,596 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 209 states to 199 states and 266 transitions. [2023-02-15 14:15:55,596 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 95 [2023-02-15 14:15:55,597 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 95 [2023-02-15 14:15:55,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 266 transitions. [2023-02-15 14:15:55,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:55,597 INFO L218 hiAutomatonCegarLoop]: Abstraction has 199 states and 266 transitions. [2023-02-15 14:15:55,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states and 266 transitions. [2023-02-15 14:15:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 174. [2023-02-15 14:15:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 174 states have (on average 1.3505747126436782) internal successors, (235), 173 states have internal predecessors, (235), 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) [2023-02-15 14:15:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2023-02-15 14:15:55,600 INFO L240 hiAutomatonCegarLoop]: Abstraction has 174 states and 235 transitions. [2023-02-15 14:15:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 14:15:55,601 INFO L428 stractBuchiCegarLoop]: Abstraction has 174 states and 235 transitions. [2023-02-15 14:15:55,601 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-02-15 14:15:55,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 174 states and 235 transitions. [2023-02-15 14:15:55,602 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 79 [2023-02-15 14:15:55,602 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:55,602 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:55,602 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2023-02-15 14:15:55,602 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-15 14:15:55,602 INFO L748 eck$LassoCheckResult]: Stem: 1787#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1788#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 1793#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1867#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 1866#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1849#L17-1 [2023-02-15 14:15:55,602 INFO L750 eck$LassoCheckResult]: Loop: 1849#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 1862#L20-1 assume !(0 == main_~up~0#1); 1860#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 1856#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1851#L14 assume !(0 == main_~i~0#1); 1848#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 1838#L17-1 assume !(1 == main_~up~0#1); 1846#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 1847#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 1845#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1843#L14 assume !(0 == main_~i~0#1); 1837#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1834#L17-1 assume !(1 == main_~up~0#1); 1832#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 1829#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 1830#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1841#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 1842#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1849#L17-1 [2023-02-15 14:15:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash 28699760, now seen corresponding path program 2 times [2023-02-15 14:15:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:55,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124799765] [2023-02-15 14:15:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:55,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:55,607 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1874596340, now seen corresponding path program 1 times [2023-02-15 14:15:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:55,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011781333] [2023-02-15 14:15:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:55,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011781333] [2023-02-15 14:15:55,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011781333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:15:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105097051] [2023-02-15 14:15:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:55,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:15:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:55,712 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:15:55,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 14:15:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:15:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:15:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:55,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105097051] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:15:55,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:15:55,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2023-02-15 14:15:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300287500] [2023-02-15 14:15:55,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:15:55,814 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 14:15:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 14:15:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-15 14:15:55,814 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. cyclomatic complexity: 69 Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:55,951 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2023-02-15 14:15:55,951 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 114 states and 126 transitions. [2023-02-15 14:15:55,951 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2023-02-15 14:15:55,952 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 114 states to 108 states and 120 transitions. [2023-02-15 14:15:55,952 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2023-02-15 14:15:55,952 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2023-02-15 14:15:55,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 120 transitions. [2023-02-15 14:15:55,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:55,952 INFO L218 hiAutomatonCegarLoop]: Abstraction has 108 states and 120 transitions. [2023-02-15 14:15:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 120 transitions. [2023-02-15 14:15:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2023-02-15 14:15:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 88 states have internal predecessors, (101), 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) [2023-02-15 14:15:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2023-02-15 14:15:55,954 INFO L240 hiAutomatonCegarLoop]: Abstraction has 89 states and 101 transitions. [2023-02-15 14:15:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 14:15:55,956 INFO L428 stractBuchiCegarLoop]: Abstraction has 89 states and 101 transitions. [2023-02-15 14:15:55,956 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-02-15 14:15:55,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 101 transitions. [2023-02-15 14:15:55,956 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:55,956 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:55,956 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:55,957 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 14:15:55,957 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:15:55,957 INFO L748 eck$LassoCheckResult]: Stem: 2200#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2201#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 2206#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2231#L14 assume !(0 == main_~i~0#1); 2229#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2227#L17-1 assume !(1 == main_~up~0#1); 2225#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2220#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2219#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2213#L14 assume !(0 == main_~i~0#1); 2214#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2267#L17-1 assume !(1 == main_~up~0#1); 2266#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2265#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2250#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2260#L14 assume !(0 == main_~i~0#1); 2258#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2256#L17-1 assume !(1 == main_~up~0#1); 2253#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2248#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2249#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2243#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2244#L14-2 [2023-02-15 14:15:55,957 INFO L750 eck$LassoCheckResult]: Loop: 2244#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2207#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 2208#L20-1 assume !(0 == main_~up~0#1); 2273#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2272#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2271#L14 assume !(0 == main_~i~0#1); 2269#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 2268#L17-1 assume !(1 == main_~up~0#1); 2254#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2251#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2245#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2246#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2244#L14-2 [2023-02-15 14:15:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2020896569, now seen corresponding path program 2 times [2023-02-15 14:15:55,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:55,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88375415] [2023-02-15 14:15:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88375415] [2023-02-15 14:15:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88375415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:15:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025227719] [2023-02-15 14:15:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 14:15:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:15:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:56,008 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:15:56,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 14:15:56,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 14:15:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 14:15:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 14:15:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:15:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025227719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:15:56,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:15:56,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 14:15:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406369260] [2023-02-15 14:15:56,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:15:56,097 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 14:15:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 2 times [2023-02-15 14:15:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:56,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488595357] [2023-02-15 14:15:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:56,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:56,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:56,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:56,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 14:15:56,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-02-15 14:15:56,148 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. cyclomatic complexity: 16 Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 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) [2023-02-15 14:15:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:56,250 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-02-15 14:15:56,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 171 transitions. [2023-02-15 14:15:56,251 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:56,252 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 151 states and 163 transitions. [2023-02-15 14:15:56,252 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 88 [2023-02-15 14:15:56,252 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 88 [2023-02-15 14:15:56,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 163 transitions. [2023-02-15 14:15:56,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:56,252 INFO L218 hiAutomatonCegarLoop]: Abstraction has 151 states and 163 transitions. [2023-02-15 14:15:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states and 163 transitions. [2023-02-15 14:15:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2023-02-15 14:15:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 137 states have (on average 1.0875912408759123) internal successors, (149), 136 states have internal predecessors, (149), 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) [2023-02-15 14:15:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2023-02-15 14:15:56,255 INFO L240 hiAutomatonCegarLoop]: Abstraction has 137 states and 149 transitions. [2023-02-15 14:15:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 14:15:56,256 INFO L428 stractBuchiCegarLoop]: Abstraction has 137 states and 149 transitions. [2023-02-15 14:15:56,256 INFO L335 stractBuchiCegarLoop]: ======== Iteration 11 ============ [2023-02-15 14:15:56,256 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 137 states and 149 transitions. [2023-02-15 14:15:56,257 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:56,257 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:56,257 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:56,258 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 7, 7, 7, 7, 7, 1, 1, 1] [2023-02-15 14:15:56,258 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:15:56,258 INFO L748 eck$LassoCheckResult]: Stem: 2606#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2607#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 2618#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2641#L14 assume !(0 == main_~i~0#1); 2638#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2635#L17-1 assume !(1 == main_~up~0#1); 2632#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2627#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2626#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2728#L14 assume !(0 == main_~i~0#1); 2623#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2614#L17-1 assume !(1 == main_~up~0#1); 2615#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2624#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2725#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2724#L14 assume !(0 == main_~i~0#1); 2723#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2722#L17-1 assume !(1 == main_~up~0#1); 2721#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2720#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2719#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2718#L14 assume !(0 == main_~i~0#1); 2717#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2716#L17-1 assume !(1 == main_~up~0#1); 2715#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2714#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2713#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2712#L14 assume !(0 == main_~i~0#1); 2711#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2710#L17-1 assume !(1 == main_~up~0#1); 2709#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2708#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2707#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2706#L14 assume !(0 == main_~i~0#1); 2705#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2704#L17-1 assume !(1 == main_~up~0#1); 2703#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2702#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2658#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2699#L14 assume !(0 == main_~i~0#1); 2671#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2669#L17-1 assume !(1 == main_~up~0#1); 2661#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2656#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 2657#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2651#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2652#L14-2 [2023-02-15 14:15:56,258 INFO L750 eck$LassoCheckResult]: Loop: 2652#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2612#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 2613#L20-1 assume !(0 == main_~up~0#1); 2667#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2666#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2665#L14 assume !(0 == main_~i~0#1); 2664#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 2663#L17-1 assume !(1 == main_~up~0#1); 2662#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2659#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2653#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2654#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2652#L14-2 [2023-02-15 14:15:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1325721725, now seen corresponding path program 3 times [2023-02-15 14:15:56,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413160172] [2023-02-15 14:15:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:56,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:56,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413160172] [2023-02-15 14:15:56,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413160172] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:15:56,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612166754] [2023-02-15 14:15:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 14:15:56,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:15:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:56,361 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:15:56,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 14:15:56,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 14:15:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 14:15:56,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 14:15:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:15:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:56,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612166754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:15:56,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:15:56,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-15 14:15:56,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89066650] [2023-02-15 14:15:56,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:15:56,551 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 14:15:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 3 times [2023-02-15 14:15:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:56,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291358058] [2023-02-15 14:15:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:56,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:56,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:56,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 14:15:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2023-02-15 14:15:56,598 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. cyclomatic complexity: 16 Second operand has 19 states, 18 states have (on average 5.444444444444445) internal successors, (98), 19 states have internal predecessors, (98), 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) [2023-02-15 14:15:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:56,769 INFO L93 Difference]: Finished difference Result 263 states and 275 transitions. [2023-02-15 14:15:56,769 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 263 states and 275 transitions. [2023-02-15 14:15:56,771 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:56,771 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 263 states to 247 states and 259 transitions. [2023-02-15 14:15:56,771 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 136 [2023-02-15 14:15:56,771 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2023-02-15 14:15:56,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 259 transitions. [2023-02-15 14:15:56,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:56,772 INFO L218 hiAutomatonCegarLoop]: Abstraction has 247 states and 259 transitions. [2023-02-15 14:15:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states and 259 transitions. [2023-02-15 14:15:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 233. [2023-02-15 14:15:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 233 states have (on average 1.0515021459227467) internal successors, (245), 232 states have internal predecessors, (245), 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) [2023-02-15 14:15:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 245 transitions. [2023-02-15 14:15:56,775 INFO L240 hiAutomatonCegarLoop]: Abstraction has 233 states and 245 transitions. [2023-02-15 14:15:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 14:15:56,775 INFO L428 stractBuchiCegarLoop]: Abstraction has 233 states and 245 transitions. [2023-02-15 14:15:56,775 INFO L335 stractBuchiCegarLoop]: ======== Iteration 12 ============ [2023-02-15 14:15:56,775 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 233 states and 245 transitions. [2023-02-15 14:15:56,776 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:56,776 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:56,776 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:56,778 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [16, 15, 15, 15, 15, 15, 1, 1, 1] [2023-02-15 14:15:56,778 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:15:56,778 INFO L748 eck$LassoCheckResult]: Stem: 3324#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 3325#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 3337#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3361#L14 assume !(0 == main_~i~0#1); 3357#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3353#L17-1 assume !(1 == main_~up~0#1); 3350#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3345#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3322#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3323#L14 assume !(0 == main_~i~0#1); 3340#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3332#L17-1 assume !(1 == main_~up~0#1); 3333#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3343#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3542#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3541#L14 assume !(0 == main_~i~0#1); 3540#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3539#L17-1 assume !(1 == main_~up~0#1); 3538#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3537#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3536#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3535#L14 assume !(0 == main_~i~0#1); 3534#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3533#L17-1 assume !(1 == main_~up~0#1); 3532#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3531#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3530#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3529#L14 assume !(0 == main_~i~0#1); 3528#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3527#L17-1 assume !(1 == main_~up~0#1); 3526#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3525#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3524#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3523#L14 assume !(0 == main_~i~0#1); 3522#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3521#L17-1 assume !(1 == main_~up~0#1); 3520#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3519#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3518#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3517#L14 assume !(0 == main_~i~0#1); 3516#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3515#L17-1 assume !(1 == main_~up~0#1); 3514#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3513#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3512#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3511#L14 assume !(0 == main_~i~0#1); 3510#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3509#L17-1 assume !(1 == main_~up~0#1); 3508#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3507#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3506#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3505#L14 assume !(0 == main_~i~0#1); 3504#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3503#L17-1 assume !(1 == main_~up~0#1); 3502#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3501#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3500#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3499#L14 assume !(0 == main_~i~0#1); 3498#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3497#L17-1 assume !(1 == main_~up~0#1); 3496#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3495#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3494#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3493#L14 assume !(0 == main_~i~0#1); 3492#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3491#L17-1 assume !(1 == main_~up~0#1); 3490#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3489#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3488#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3487#L14 assume !(0 == main_~i~0#1); 3486#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3485#L17-1 assume !(1 == main_~up~0#1); 3484#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3483#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3482#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3481#L14 assume !(0 == main_~i~0#1); 3480#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3479#L17-1 assume !(1 == main_~up~0#1); 3478#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3477#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3476#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3475#L14 assume !(0 == main_~i~0#1); 3474#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3473#L17-1 assume !(1 == main_~up~0#1); 3472#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3471#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3377#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3468#L14 assume !(0 == main_~i~0#1); 3392#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3388#L17-1 assume !(1 == main_~up~0#1); 3380#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3375#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 3376#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3370#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 3371#L14-2 [2023-02-15 14:15:56,778 INFO L750 eck$LassoCheckResult]: Loop: 3371#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3330#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 3331#L20-1 assume !(0 == main_~up~0#1); 3386#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 3385#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3384#L14 assume !(0 == main_~i~0#1); 3383#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 3382#L17-1 assume !(1 == main_~up~0#1); 3381#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 3378#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 3372#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3373#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 3371#L14-2 [2023-02-15 14:15:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash -944359675, now seen corresponding path program 4 times [2023-02-15 14:15:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:56,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994594387] [2023-02-15 14:15:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:15:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:15:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994594387] [2023-02-15 14:15:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994594387] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:15:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413780085] [2023-02-15 14:15:57,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 14:15:57,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:15:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:57,067 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:15:57,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 14:15:57,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 14:15:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 14:15:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 14:15:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:15:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:57,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:15:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:15:57,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413780085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:15:57,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:15:57,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-15 14:15:57,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103841594] [2023-02-15 14:15:57,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:15:57,448 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 14:15:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 4 times [2023-02-15 14:15:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178153092] [2023-02-15 14:15:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:15:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 14:15:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2023-02-15 14:15:57,495 INFO L87 Difference]: Start difference. First operand 233 states and 245 transitions. cyclomatic complexity: 16 Second operand has 23 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 23 states have internal predecessors, (127), 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) [2023-02-15 14:15:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:15:57,657 INFO L93 Difference]: Finished difference Result 303 states and 315 transitions. [2023-02-15 14:15:57,657 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 303 states and 315 transitions. [2023-02-15 14:15:57,659 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:57,660 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 303 states to 295 states and 307 transitions. [2023-02-15 14:15:57,660 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 160 [2023-02-15 14:15:57,660 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 160 [2023-02-15 14:15:57,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 295 states and 307 transitions. [2023-02-15 14:15:57,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:15:57,661 INFO L218 hiAutomatonCegarLoop]: Abstraction has 295 states and 307 transitions. [2023-02-15 14:15:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states and 307 transitions. [2023-02-15 14:15:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 281. [2023-02-15 14:15:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 281 states have (on average 1.0427046263345197) internal successors, (293), 280 states have internal predecessors, (293), 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) [2023-02-15 14:15:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2023-02-15 14:15:57,665 INFO L240 hiAutomatonCegarLoop]: Abstraction has 281 states and 293 transitions. [2023-02-15 14:15:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 14:15:57,665 INFO L428 stractBuchiCegarLoop]: Abstraction has 281 states and 293 transitions. [2023-02-15 14:15:57,666 INFO L335 stractBuchiCegarLoop]: ======== Iteration 13 ============ [2023-02-15 14:15:57,666 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 281 states and 293 transitions. [2023-02-15 14:15:57,667 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2023-02-15 14:15:57,667 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:57,667 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:57,668 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [20, 19, 19, 19, 19, 19, 1, 1, 1] [2023-02-15 14:15:57,668 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:15:57,668 INFO L748 eck$LassoCheckResult]: Stem: 4462#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 4463#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 4468#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4488#L14 assume !(0 == main_~i~0#1); 4486#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4485#L17-1 assume !(1 == main_~up~0#1); 4484#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4481#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4480#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4476#L14 assume !(0 == main_~i~0#1); 4477#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4471#L17-1 assume !(1 == main_~up~0#1); 4472#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4478#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4623#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4622#L14 assume !(0 == main_~i~0#1); 4621#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4620#L17-1 assume !(1 == main_~up~0#1); 4619#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4618#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4617#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4616#L14 assume !(0 == main_~i~0#1); 4615#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4614#L17-1 assume !(1 == main_~up~0#1); 4613#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4612#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4611#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4610#L14 assume !(0 == main_~i~0#1); 4609#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4608#L17-1 assume !(1 == main_~up~0#1); 4607#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4606#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4605#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4604#L14 assume !(0 == main_~i~0#1); 4603#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4602#L17-1 assume !(1 == main_~up~0#1); 4601#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4600#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4599#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4598#L14 assume !(0 == main_~i~0#1); 4597#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4596#L17-1 assume !(1 == main_~up~0#1); 4595#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4594#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4593#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4592#L14 assume !(0 == main_~i~0#1); 4591#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4590#L17-1 assume !(1 == main_~up~0#1); 4589#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4588#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4587#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4586#L14 assume !(0 == main_~i~0#1); 4585#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4584#L17-1 assume !(1 == main_~up~0#1); 4583#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4582#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4581#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4580#L14 assume !(0 == main_~i~0#1); 4579#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4578#L17-1 assume !(1 == main_~up~0#1); 4577#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4576#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4575#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4574#L14 assume !(0 == main_~i~0#1); 4573#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4572#L17-1 assume !(1 == main_~up~0#1); 4571#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4570#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4569#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4568#L14 assume !(0 == main_~i~0#1); 4567#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4566#L17-1 assume !(1 == main_~up~0#1); 4565#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4564#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4563#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4562#L14 assume !(0 == main_~i~0#1); 4561#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4560#L17-1 assume !(1 == main_~up~0#1); 4559#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4558#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4557#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4556#L14 assume !(0 == main_~i~0#1); 4555#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4554#L17-1 assume !(1 == main_~up~0#1); 4553#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4552#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4551#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4550#L14 assume !(0 == main_~i~0#1); 4549#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4548#L17-1 assume !(1 == main_~up~0#1); 4547#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4546#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4545#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4544#L14 assume !(0 == main_~i~0#1); 4543#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4542#L17-1 assume !(1 == main_~up~0#1); 4541#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4540#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4539#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4538#L14 assume !(0 == main_~i~0#1); 4537#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4536#L17-1 assume !(1 == main_~up~0#1); 4535#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4534#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4533#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4532#L14 assume !(0 == main_~i~0#1); 4531#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4530#L17-1 assume !(1 == main_~up~0#1); 4529#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4528#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4504#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4515#L14 assume !(0 == main_~i~0#1); 4511#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4508#L17-1 assume !(1 == main_~up~0#1); 4505#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4502#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4503#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4513#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 4514#L14-2 [2023-02-15 14:15:57,669 INFO L750 eck$LassoCheckResult]: Loop: 4514#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4506#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 4507#L20-1 assume !(0 == main_~up~0#1); 4526#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4525#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4524#L14 assume !(0 == main_~i~0#1); 4523#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 4522#L17-1 assume !(1 == main_~up~0#1); 4521#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4519#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4516#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4517#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 4514#L14-2 [2023-02-15 14:15:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 228527177, now seen corresponding path program 5 times [2023-02-15 14:15:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:57,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865694394] [2023-02-15 14:15:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 5 times [2023-02-15 14:15:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:57,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644577188] [2023-02-15 14:15:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 210101867, now seen corresponding path program 1 times [2023-02-15 14:15:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984929334] [2023-02-15 14:15:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:57,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:58,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:58,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 02:15:58 BoogieIcfgContainer [2023-02-15 14:15:58,570 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 14:15:58,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 14:15:58,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 14:15:58,570 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 14:15:58,571 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:52" (3/4) ... [2023-02-15 14:15:58,572 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-15 14:15:58,621 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 14:15:58,621 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 14:15:58,621 INFO L158 Benchmark]: Toolchain (without parser) took 6726.06ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 99.5MB in the beginning and 106.8MB in the end (delta: -7.3MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,621 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:58,621 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.58ms. Allocated memory is still 132.1MB. Free memory was 99.5MB in the beginning and 90.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.49ms. Allocated memory is still 132.1MB. Free memory was 90.1MB in the beginning and 88.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,622 INFO L158 Benchmark]: Boogie Preprocessor took 13.03ms. Allocated memory is still 132.1MB. Free memory was 88.6MB in the beginning and 88.0MB in the end (delta: 657.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:58,622 INFO L158 Benchmark]: RCFGBuilder took 198.99ms. Allocated memory is still 132.1MB. Free memory was 87.5MB in the beginning and 79.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,622 INFO L158 Benchmark]: BuchiAutomizer took 6276.36ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 78.6MB in the beginning and 112.0MB in the end (delta: -33.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,622 INFO L158 Benchmark]: Witness Printer took 50.61ms. Allocated memory is still 192.9MB. Free memory was 112.0MB in the beginning and 106.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 14:15:58,623 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 107.0MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.58ms. Allocated memory is still 132.1MB. Free memory was 99.5MB in the beginning and 90.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.49ms. Allocated memory is still 132.1MB. Free memory was 90.1MB in the beginning and 88.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.03ms. Allocated memory is still 132.1MB. Free memory was 88.6MB in the beginning and 88.0MB in the end (delta: 657.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 198.99ms. Allocated memory is still 132.1MB. Free memory was 87.5MB in the beginning and 79.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 6276.36ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 78.6MB in the beginning and 112.0MB in the end (delta: -33.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Witness Printer took 50.61ms. Allocated memory is still 192.9MB. Free memory was 112.0MB in the beginning and 106.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. 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 13 terminating modules (10 trivial, 2 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -1 * i + range and consists of 4 locations. One nondeterministic module has affine ranking function -1 * i + range and consists of 4 locations. 10 modules have a trivial ranking function, the largest among these consists of 23 locations. The remainder module has 281 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.1s and 13 iterations. TraceHistogramMax:20. Analysis of lassos took 4.6s. Construction of modules took 0.4s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 10. Automata minimization 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 155 StatesRemovedByMinimization, 11 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 [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 458 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 453 mSDsluCounter, 360 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 191 mSDsCounter, 105 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 822 IncrementalHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 105 mSolverCounterUnsat, 169 mSDtfsCounter, 822 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI4 SFLT2 conc2 concLT0 SILN3 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital30 mio100 ax139 hnf100 lsp64 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq174 hnf100 smp60 dnf141 smp94 tf105 neg90 sie120 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 34ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L6] int i; [L7] int range; [L8] int up; [L9] i = __VERIFIER_nondet_int() [L10] range = 20 [L11] up = 0 VAL [range=20, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=19, range=20, up=0] [L14] COND FALSE !(i == 0) VAL [i=19, range=20, up=0] [L17] COND FALSE !(i == range) VAL [i=19, range=20, up=0] [L20] COND FALSE !(up == 1) VAL [i=19, range=20, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=18, range=20, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=18, range=19, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=18, range=19, up=0] [L14] COND FALSE !(i == 0) VAL [i=18, range=19, up=0] [L17] COND FALSE !(i == range) VAL [i=18, range=19, up=0] [L20] COND FALSE !(up == 1) VAL [i=18, range=19, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=17, range=19, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=17, range=18, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=17, range=18, up=0] [L14] COND FALSE !(i == 0) VAL [i=17, range=18, up=0] [L17] COND FALSE !(i == range) VAL [i=17, range=18, up=0] [L20] COND FALSE !(up == 1) VAL [i=17, range=18, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=16, range=18, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=16, range=17, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=16, range=17, up=0] [L14] COND FALSE !(i == 0) VAL [i=16, range=17, up=0] [L17] COND FALSE !(i == range) VAL [i=16, range=17, up=0] [L20] COND FALSE !(up == 1) VAL [i=16, range=17, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=15, range=17, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=15, range=16, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=15, range=16, up=0] [L14] COND FALSE !(i == 0) VAL [i=15, range=16, up=0] [L17] COND FALSE !(i == range) VAL [i=15, range=16, up=0] [L20] COND FALSE !(up == 1) VAL [i=15, range=16, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=14, range=16, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=14, range=15, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=14, range=15, up=0] [L14] COND FALSE !(i == 0) VAL [i=14, range=15, up=0] [L17] COND FALSE !(i == range) VAL [i=14, range=15, up=0] [L20] COND FALSE !(up == 1) VAL [i=14, range=15, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=13, range=15, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=13, range=14, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=13, range=14, up=0] [L14] COND FALSE !(i == 0) VAL [i=13, range=14, up=0] [L17] COND FALSE !(i == range) VAL [i=13, range=14, up=0] [L20] COND FALSE !(up == 1) VAL [i=13, range=14, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=12, range=14, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=12, range=13, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=12, range=13, up=0] [L14] COND FALSE !(i == 0) VAL [i=12, range=13, up=0] [L17] COND FALSE !(i == range) VAL [i=12, range=13, up=0] [L20] COND FALSE !(up == 1) VAL [i=12, range=13, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=11, range=13, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=11, range=12, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=11, range=12, up=0] [L14] COND FALSE !(i == 0) VAL [i=11, range=12, up=0] [L17] COND FALSE !(i == range) VAL [i=11, range=12, up=0] [L20] COND FALSE !(up == 1) VAL [i=11, range=12, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=10, range=12, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=10, range=11, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=10, range=11, up=0] [L14] COND FALSE !(i == 0) VAL [i=10, range=11, up=0] [L17] COND FALSE !(i == range) VAL [i=10, range=11, up=0] [L20] COND FALSE !(up == 1) VAL [i=10, range=11, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=9, range=11, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=9, range=10, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=9, range=10, up=0] [L14] COND FALSE !(i == 0) VAL [i=9, range=10, up=0] [L17] COND FALSE !(i == range) VAL [i=9, range=10, up=0] [L20] COND FALSE !(up == 1) VAL [i=9, range=10, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=8, range=10, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=8, range=9, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=8, range=9, up=0] [L14] COND FALSE !(i == 0) VAL [i=8, range=9, up=0] [L17] COND FALSE !(i == range) VAL [i=8, range=9, up=0] [L20] COND FALSE !(up == 1) VAL [i=8, range=9, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=7, range=9, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=7, range=8, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=7, range=8, up=0] [L14] COND FALSE !(i == 0) VAL [i=7, range=8, up=0] [L17] COND FALSE !(i == range) VAL [i=7, range=8, up=0] [L20] COND FALSE !(up == 1) VAL [i=7, range=8, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=6, range=8, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=6, range=7, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=6, range=7, up=0] [L14] COND FALSE !(i == 0) VAL [i=6, range=7, up=0] [L17] COND FALSE !(i == range) VAL [i=6, range=7, up=0] [L20] COND FALSE !(up == 1) VAL [i=6, range=7, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=5, range=7, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=5, range=6, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=5, range=6, up=0] [L14] COND FALSE !(i == 0) VAL [i=5, range=6, up=0] [L17] COND FALSE !(i == range) VAL [i=5, range=6, up=0] [L20] COND FALSE !(up == 1) VAL [i=5, range=6, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=4, range=6, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=4, range=5, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=4, range=5, up=0] [L14] COND FALSE !(i == 0) VAL [i=4, range=5, up=0] [L17] COND FALSE !(i == range) VAL [i=4, range=5, up=0] [L20] COND FALSE !(up == 1) VAL [i=4, range=5, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=3, range=5, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=3, range=4, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=3, range=4, up=0] [L14] COND FALSE !(i == 0) VAL [i=3, range=4, up=0] [L17] COND FALSE !(i == range) VAL [i=3, range=4, up=0] [L20] COND FALSE !(up == 1) VAL [i=3, range=4, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=2, range=4, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=2, range=3, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=2, range=3, up=0] [L14] COND FALSE !(i == 0) VAL [i=2, range=3, up=0] [L17] COND FALSE !(i == range) VAL [i=2, range=3, up=0] [L20] COND FALSE !(up == 1) VAL [i=2, range=3, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=1, range=3, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=1, range=2, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=1, range=2, up=0] [L14] COND FALSE !(i == 0) VAL [i=1, range=2, up=0] [L17] COND FALSE !(i == range) VAL [i=1, range=2, up=0] [L20] COND FALSE !(up == 1) VAL [i=1, range=2, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=0, range=2, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=0, range=1, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=0, range=1, up=0] [L14] COND TRUE i == 0 [L15] up = 1 VAL [i=0, range=1, up=1] Loop: [L17] COND FALSE !(i == range) [L20] COND TRUE up == 1 [L21] i = i+1 [L23] COND FALSE !(up == 0) [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int range; [L8] int up; [L9] i = __VERIFIER_nondet_int() [L10] range = 20 [L11] up = 0 VAL [range=20, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=19, range=20, up=0] [L14] COND FALSE !(i == 0) VAL [i=19, range=20, up=0] [L17] COND FALSE !(i == range) VAL [i=19, range=20, up=0] [L20] COND FALSE !(up == 1) VAL [i=19, range=20, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=18, range=20, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=18, range=19, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=18, range=19, up=0] [L14] COND FALSE !(i == 0) VAL [i=18, range=19, up=0] [L17] COND FALSE !(i == range) VAL [i=18, range=19, up=0] [L20] COND FALSE !(up == 1) VAL [i=18, range=19, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=17, range=19, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=17, range=18, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=17, range=18, up=0] [L14] COND FALSE !(i == 0) VAL [i=17, range=18, up=0] [L17] COND FALSE !(i == range) VAL [i=17, range=18, up=0] [L20] COND FALSE !(up == 1) VAL [i=17, range=18, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=16, range=18, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=16, range=17, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=16, range=17, up=0] [L14] COND FALSE !(i == 0) VAL [i=16, range=17, up=0] [L17] COND FALSE !(i == range) VAL [i=16, range=17, up=0] [L20] COND FALSE !(up == 1) VAL [i=16, range=17, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=15, range=17, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=15, range=16, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=15, range=16, up=0] [L14] COND FALSE !(i == 0) VAL [i=15, range=16, up=0] [L17] COND FALSE !(i == range) VAL [i=15, range=16, up=0] [L20] COND FALSE !(up == 1) VAL [i=15, range=16, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=14, range=16, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=14, range=15, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=14, range=15, up=0] [L14] COND FALSE !(i == 0) VAL [i=14, range=15, up=0] [L17] COND FALSE !(i == range) VAL [i=14, range=15, up=0] [L20] COND FALSE !(up == 1) VAL [i=14, range=15, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=13, range=15, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=13, range=14, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=13, range=14, up=0] [L14] COND FALSE !(i == 0) VAL [i=13, range=14, up=0] [L17] COND FALSE !(i == range) VAL [i=13, range=14, up=0] [L20] COND FALSE !(up == 1) VAL [i=13, range=14, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=12, range=14, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=12, range=13, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=12, range=13, up=0] [L14] COND FALSE !(i == 0) VAL [i=12, range=13, up=0] [L17] COND FALSE !(i == range) VAL [i=12, range=13, up=0] [L20] COND FALSE !(up == 1) VAL [i=12, range=13, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=11, range=13, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=11, range=12, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=11, range=12, up=0] [L14] COND FALSE !(i == 0) VAL [i=11, range=12, up=0] [L17] COND FALSE !(i == range) VAL [i=11, range=12, up=0] [L20] COND FALSE !(up == 1) VAL [i=11, range=12, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=10, range=12, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=10, range=11, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=10, range=11, up=0] [L14] COND FALSE !(i == 0) VAL [i=10, range=11, up=0] [L17] COND FALSE !(i == range) VAL [i=10, range=11, up=0] [L20] COND FALSE !(up == 1) VAL [i=10, range=11, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=9, range=11, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=9, range=10, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=9, range=10, up=0] [L14] COND FALSE !(i == 0) VAL [i=9, range=10, up=0] [L17] COND FALSE !(i == range) VAL [i=9, range=10, up=0] [L20] COND FALSE !(up == 1) VAL [i=9, range=10, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=8, range=10, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=8, range=9, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=8, range=9, up=0] [L14] COND FALSE !(i == 0) VAL [i=8, range=9, up=0] [L17] COND FALSE !(i == range) VAL [i=8, range=9, up=0] [L20] COND FALSE !(up == 1) VAL [i=8, range=9, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=7, range=9, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=7, range=8, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=7, range=8, up=0] [L14] COND FALSE !(i == 0) VAL [i=7, range=8, up=0] [L17] COND FALSE !(i == range) VAL [i=7, range=8, up=0] [L20] COND FALSE !(up == 1) VAL [i=7, range=8, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=6, range=8, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=6, range=7, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=6, range=7, up=0] [L14] COND FALSE !(i == 0) VAL [i=6, range=7, up=0] [L17] COND FALSE !(i == range) VAL [i=6, range=7, up=0] [L20] COND FALSE !(up == 1) VAL [i=6, range=7, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=5, range=7, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=5, range=6, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=5, range=6, up=0] [L14] COND FALSE !(i == 0) VAL [i=5, range=6, up=0] [L17] COND FALSE !(i == range) VAL [i=5, range=6, up=0] [L20] COND FALSE !(up == 1) VAL [i=5, range=6, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=4, range=6, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=4, range=5, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=4, range=5, up=0] [L14] COND FALSE !(i == 0) VAL [i=4, range=5, up=0] [L17] COND FALSE !(i == range) VAL [i=4, range=5, up=0] [L20] COND FALSE !(up == 1) VAL [i=4, range=5, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=3, range=5, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=3, range=4, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=3, range=4, up=0] [L14] COND FALSE !(i == 0) VAL [i=3, range=4, up=0] [L17] COND FALSE !(i == range) VAL [i=3, range=4, up=0] [L20] COND FALSE !(up == 1) VAL [i=3, range=4, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=2, range=4, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=2, range=3, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=2, range=3, up=0] [L14] COND FALSE !(i == 0) VAL [i=2, range=3, up=0] [L17] COND FALSE !(i == range) VAL [i=2, range=3, up=0] [L20] COND FALSE !(up == 1) VAL [i=2, range=3, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=1, range=3, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=1, range=2, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=1, range=2, up=0] [L14] COND FALSE !(i == 0) VAL [i=1, range=2, up=0] [L17] COND FALSE !(i == range) VAL [i=1, range=2, up=0] [L20] COND FALSE !(up == 1) VAL [i=1, range=2, up=0] [L23] COND TRUE up == 0 [L24] i = i-1 VAL [i=0, range=2, up=0] [L26] COND TRUE i == range-2 [L27] range = range-1 VAL [i=0, range=1, up=0] [L13] COND TRUE 0 <= i && i <= range VAL [i=0, range=1, up=0] [L14] COND TRUE i == 0 [L15] up = 1 VAL [i=0, range=1, up=1] Loop: [L17] COND FALSE !(i == range) [L20] COND TRUE up == 1 [L21] i = i+1 [L23] COND FALSE !(up == 0) [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-02-15 14:15:58,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:58,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-15 14:15:59,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 14:15:59,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-15 14:15:59,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 14:15:59,695 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)