./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/AlternKonv.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f4b24e32 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/AlternKonv.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 9816d5cc9e8c1fba9291af90498afaa319416e5c56fa3cf3ce8da9d63d3e9939 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 14:51:20,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 14:51:20,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 14:51:20,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 14:51:20,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 14:51:20,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 14:51:20,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 14:51:20,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 14:51:20,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 14:51:20,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 14:51:20,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 14:51:20,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 14:51:20,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 14:51:20,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 14:51:20,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 14:51:20,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 14:51:20,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 14:51:20,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 14:51:20,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 14:51:20,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 14:51:20,350 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 14:51:20,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 14:51:20,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 14:51:20,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 14:51:20,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 14:51:20,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 14:51:20,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 14:51:20,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 14:51:20,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 14:51:20,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 14:51:20,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 14:51:20,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 14:51:20,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 14:51:20,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 14:51:20,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 14:51:20,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 14:51:20,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 14:51:20,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 14:51:20,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 14:51:20,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 14:51:20,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 14:51:20,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 14:51:20,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-14 14:51:20,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 14:51:20,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 14:51:20,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 14:51:20,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 14:51:20,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 14:51:20,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 14:51:20,391 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 14:51:20,391 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-14 14:51:20,392 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-14 14:51:20,392 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-14 14:51:20,392 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-14 14:51:20,392 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-14 14:51:20,393 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-14 14:51:20,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 14:51:20,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 14:51:20,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 14:51:20,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 14:51:20,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-14 14:51:20,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-14 14:51:20,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-14 14:51:20,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 14:51:20,395 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-14 14:51:20,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 14:51:20,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-14 14:51:20,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 14:51:20,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 14:51:20,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 14:51:20,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 14:51:20,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-14 14:51:20,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9816d5cc9e8c1fba9291af90498afaa319416e5c56fa3cf3ce8da9d63d3e9939 [2022-07-14 14:51:20,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 14:51:20,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 14:51:20,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 14:51:20,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 14:51:20,582 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 14:51:20,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2022-07-14 14:51:20,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6036a75/2cebcbeeb8dc4916a5251bf7a926eed8/FLAGb6308b356 [2022-07-14 14:51:20,972 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 14:51:20,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2022-07-14 14:51:20,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6036a75/2cebcbeeb8dc4916a5251bf7a926eed8/FLAGb6308b356 [2022-07-14 14:51:21,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6036a75/2cebcbeeb8dc4916a5251bf7a926eed8 [2022-07-14 14:51:21,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 14:51:21,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 14:51:21,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 14:51:21,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 14:51:21,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 14:51:21,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a26c158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21, skipping insertion in model container [2022-07-14 14:51:21,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 14:51:21,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 14:51:21,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 14:51:21,540 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 14:51:21,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 14:51:21,556 INFO L208 MainTranslator]: Completed translation [2022-07-14 14:51:21,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21 WrapperNode [2022-07-14 14:51:21,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 14:51:21,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 14:51:21,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 14:51:21,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 14:51:21,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,576 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-14 14:51:21,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 14:51:21,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 14:51:21,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 14:51:21,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 14:51:21,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 14:51:21,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 14:51:21,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 14:51:21,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 14:51:21,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (1/1) ... [2022-07-14 14:51:21,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:21,605 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) [2022-07-14 14:51:21,612 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 [2022-07-14 14:51:21,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 14:51:21,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 14:51:21,661 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 14:51:21,662 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 14:51:21,706 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 14:51:21,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 14:51:21,710 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-14 14:51:21,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:51:21 BoogieIcfgContainer [2022-07-14 14:51:21,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 14:51:21,711 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-14 14:51:21,712 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-14 14:51:21,714 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-14 14:51:21,714 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:51:21,714 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.07 02:51:21" (1/3) ... [2022-07-14 14:51:21,715 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3f8a47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 02:51:21, skipping insertion in model container [2022-07-14 14:51:21,716 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:51:21,716 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 02:51:21" (2/3) ... [2022-07-14 14:51:21,718 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3f8a47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 02:51:21, skipping insertion in model container [2022-07-14 14:51:21,718 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 14:51:21,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:51:21" (3/3) ... [2022-07-14 14:51:21,719 INFO L354 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2022-07-14 14:51:21,753 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-14 14:51:21,753 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-14 14:51:21,753 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-14 14:51:21,753 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-14 14:51:21,754 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-14 14:51:21,754 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-14 14:51:21,754 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-14 14:51:21,754 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-14 14:51:21,756 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:21,766 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 14:51:21,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:21,767 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:21,774 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-14 14:51:21,774 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-14 14:51:21,774 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-14 14:51:21,775 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:21,776 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 14:51:21,776 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:21,776 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:21,776 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-14 14:51:21,776 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-14 14:51:21,781 INFO L752 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 6#L18-2true [2022-07-14 14:51:21,781 INFO L754 eck$LassoCheckResult]: Loop: 6#L18-2true assume !!(0 != main_~i~0#1); 7#L10true assume !(main_~i~0#1 < 0);main_~i~0#1 := main_~i~0#1 - 2; 3#L18true assume !(main_~i~0#1 > 0); 6#L18-2true [2022-07-14 14:51:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-07-14 14:51:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:21,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469913687] [2022-07-14 14:51:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:21,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,850 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,869 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash 41231, now seen corresponding path program 1 times [2022-07-14 14:51:21,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:21,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479753134] [2022-07-14 14:51:21,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:21,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 28700173, now seen corresponding path program 1 times [2022-07-14 14:51:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031209974] [2022-07-14 14:51:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,906 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:21,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:21,956 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:51:21,957 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:51:21,957 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:51:21,957 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:51:21,957 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 14:51:21,957 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:21,957 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:51:21,957 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:51:21,958 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2022-07-14 14:51:21,958 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:51:21,958 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:51:21,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:21,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:21,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:22,052 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:51:22,053 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 14:51:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,055 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) [2022-07-14 14:51:22,056 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 [2022-07-14 14:51:22,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:51:22,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:51:22,078 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 14:51:22,078 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: [] [2022-07-14 14:51:22,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-07-14 14:51:22,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,095 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) [2022-07-14 14:51:22,096 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 [2022-07-14 14:51:22,097 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:51:22,097 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:51:22,108 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 14:51:22,108 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: [] [2022-07-14 14:51:22,127 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 [2022-07-14 14:51:22,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,128 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) [2022-07-14 14:51:22,129 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 [2022-07-14 14:51:22,131 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 14:51:22,131 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:51:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-14 14:51:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,165 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) [2022-07-14 14:51:22,172 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 [2022-07-14 14:51:22,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 14:51:22,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 14:51:22,204 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 14:51:22,208 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 [2022-07-14 14:51:22,208 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 14:51:22,208 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 14:51:22,208 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 14:51:22,208 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 14:51:22,208 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 14:51:22,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 14:51:22,208 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 14:51:22,208 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2022-07-14 14:51:22,208 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 14:51:22,209 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 14:51:22,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:22,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:22,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 14:51:22,274 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 14:51:22,277 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 14:51:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,279 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) [2022-07-14 14:51:22,280 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 [2022-07-14 14:51:22,281 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 [2022-07-14 14:51:22,287 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:51:22,287 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:51:22,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:51:22,287 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:51:22,291 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:51:22,291 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:51:22,299 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:51:22,314 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 [2022-07-14 14:51:22,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,316 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) [2022-07-14 14:51:22,317 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 [2022-07-14 14:51:22,352 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 [2022-07-14 14:51:22,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:51:22,358 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:51:22,358 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:51:22,358 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:51:22,361 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-14 14:51:22,361 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-14 14:51:22,382 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 14:51:22,397 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 [2022-07-14 14:51:22,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,398 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) [2022-07-14 14:51:22,399 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 [2022-07-14 14:51:22,400 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 [2022-07-14 14:51:22,406 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 14:51:22,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 14:51:22,407 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 14:51:22,407 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 14:51:22,407 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 14:51:22,408 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 14:51:22,408 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 14:51:22,417 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 14:51:22,420 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 14:51:22,420 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 14:51:22,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 14:51:22,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 14:51:22,443 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) [2022-07-14 14:51:22,444 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 [2022-07-14 14:51:22,463 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 14:51:22,464 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 14:51:22,464 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 14:51:22,464 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 [] [2022-07-14 14:51:22,481 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 [2022-07-14 14:51:22,484 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 14:51:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:51:22,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 14:51:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:51:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:51:22,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 14:51:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 14:51:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:51:22,590 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-07-14 14:51:22,590 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:22,615 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 32 states and 47 transitions. Complement of second has 6 states. [2022-07-14 14:51:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-07-14 14:51:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2022-07-14 14:51:22,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 2 letters. Loop has 3 letters. [2022-07-14 14:51:22,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:51:22,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 5 letters. Loop has 3 letters. [2022-07-14 14:51:22,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:51:22,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 2 letters. Loop has 6 letters. [2022-07-14 14:51:22,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 14:51:22,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 47 transitions. [2022-07-14 14:51:22,630 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 14:51:22,632 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 15 states and 22 transitions. [2022-07-14 14:51:22,632 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-07-14 14:51:22,633 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-07-14 14:51:22,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2022-07-14 14:51:22,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:51:22,634 INFO L369 hiAutomatonCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-07-14 14:51:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2022-07-14 14:51:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-14 14:51:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-07-14 14:51:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-07-14 14:51:22,650 INFO L392 hiAutomatonCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-07-14 14:51:22,650 INFO L374 stractBuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-07-14 14:51:22,650 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-14 14:51:22,650 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 21 transitions. [2022-07-14 14:51:22,651 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 14:51:22,651 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:22,651 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:22,651 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-14 14:51:22,651 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-14 14:51:22,651 INFO L752 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 91#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 95#L18-2 assume !!(0 != main_~i~0#1); 92#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 94#L12 [2022-07-14 14:51:22,652 INFO L754 eck$LassoCheckResult]: Loop: 94#L12 assume !(main_~i~0#1 < 0); 84#L18-2 assume !!(0 != main_~i~0#1); 96#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 94#L12 [2022-07-14 14:51:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,655 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-07-14 14:51:22,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305461774] [2022-07-14 14:51:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,661 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash 53210, now seen corresponding path program 1 times [2022-07-14 14:51:22,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811711020] [2022-07-14 14:51:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:51:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:51:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 14:51:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811711020] [2022-07-14 14:51:22,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811711020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 14:51:22,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 14:51:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 14:51:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228270274] [2022-07-14 14:51:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 14:51:22,710 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 14:51:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 14:51:22,711 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 [2022-07-14 14:51:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 14:51:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 14:51:22,720 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. cyclomatic complexity: 9 Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 14:51:22,734 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2022-07-14 14:51:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 14:51:22,735 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 23 transitions. [2022-07-14 14:51:22,736 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2022-07-14 14:51:22,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 23 transitions. [2022-07-14 14:51:22,737 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2022-07-14 14:51:22,737 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2022-07-14 14:51:22,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 23 transitions. [2022-07-14 14:51:22,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:51:22,737 INFO L369 hiAutomatonCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-07-14 14:51:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 23 transitions. [2022-07-14 14:51:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-14 14:51:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 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) [2022-07-14 14:51:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-07-14 14:51:22,740 INFO L392 hiAutomatonCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-07-14 14:51:22,740 INFO L374 stractBuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-07-14 14:51:22,740 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-14 14:51:22,740 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2022-07-14 14:51:22,741 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2022-07-14 14:51:22,742 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:22,742 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:22,743 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-14 14:51:22,743 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 14:51:22,743 INFO L752 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 126#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 133#L18-2 assume !!(0 != main_~i~0#1); 131#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 132#L12 [2022-07-14 14:51:22,743 INFO L754 eck$LassoCheckResult]: Loop: 132#L12 assume main_~i~0#1 < 0; 127#L13 assume !(main_~i~0#1 <= -2147483648);main_~i~0#1 := -1 * main_~i~0#1; 120#L18-2 assume !!(0 != main_~i~0#1); 134#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 132#L12 [2022-07-14 14:51:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 2 times [2022-07-14 14:51:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030991527] [2022-07-14 14:51:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,748 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1451465, now seen corresponding path program 1 times [2022-07-14 14:51:22,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765957542] [2022-07-14 14:51:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:51:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:51:22,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 14:51:22,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765957542] [2022-07-14 14:51:22,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765957542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 14:51:22,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 14:51:22,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 14:51:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685333143] [2022-07-14 14:51:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 14:51:22,766 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 14:51:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 14:51:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 14:51:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 14:51:22,767 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 14:51:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 14:51:22,782 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-07-14 14:51:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 14:51:22,783 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 28 transitions. [2022-07-14 14:51:22,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2022-07-14 14:51:22,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 21 states and 27 transitions. [2022-07-14 14:51:22,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-14 14:51:22,784 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-14 14:51:22,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 27 transitions. [2022-07-14 14:51:22,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:51:22,785 INFO L369 hiAutomatonCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-14 14:51:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 27 transitions. [2022-07-14 14:51:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-07-14 14:51:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-07-14 14:51:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-07-14 14:51:22,786 INFO L392 hiAutomatonCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-07-14 14:51:22,786 INFO L374 stractBuchiCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-07-14 14:51:22,786 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-14 14:51:22,786 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 21 transitions. [2022-07-14 14:51:22,787 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2022-07-14 14:51:22,787 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:22,787 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:22,787 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 14:51:22,787 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2022-07-14 14:51:22,787 INFO L752 eck$LassoCheckResult]: Stem: 169#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 170#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;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 176#L18-2 assume !!(0 != main_~i~0#1); 173#L10 [2022-07-14 14:51:22,787 INFO L754 eck$LassoCheckResult]: Loop: 173#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 175#L12 assume !(main_~i~0#1 < 0); 172#L18-2 assume !!(0 != main_~i~0#1); 177#L10 assume !(main_~i~0#1 < 0);main_~i~0#1 := main_~i~0#1 - 2; 164#L18 assume main_~i~0#1 > 0;main_~i~0#1 := -1 * main_~i~0#1; 166#L18-2 assume !!(0 != main_~i~0#1); 173#L10 [2022-07-14 14:51:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2022-07-14 14:51:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223785950] [2022-07-14 14:51:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,791 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1310830888, now seen corresponding path program 1 times [2022-07-14 14:51:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772436463] [2022-07-14 14:51:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 14:51:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 14:51:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 14:51:22,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772436463] [2022-07-14 14:51:22,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772436463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 14:51:22,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 14:51:22,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 14:51:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970427098] [2022-07-14 14:51:22,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 14:51:22,808 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 14:51:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 14:51:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 14:51:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 14:51:22,809 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 1.5) 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) [2022-07-14 14:51:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 14:51:22,829 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-07-14 14:51:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 14:51:22,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2022-07-14 14:51:22,831 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 14:51:22,832 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2022-07-14 14:51:22,832 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-14 14:51:22,832 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2022-07-14 14:51:22,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2022-07-14 14:51:22,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 14:51:22,832 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-14 14:51:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2022-07-14 14:51:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2022-07-14 14:51:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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) [2022-07-14 14:51:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-07-14 14:51:22,834 INFO L392 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-07-14 14:51:22,834 INFO L374 stractBuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-07-14 14:51:22,834 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-14 14:51:22,834 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2022-07-14 14:51:22,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2022-07-14 14:51:22,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 14:51:22,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 14:51:22,835 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 14:51:22,835 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2022-07-14 14:51:22,835 INFO L752 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 218#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 221#L18-2 assume !!(0 != main_~i~0#1); 219#L10 [2022-07-14 14:51:22,835 INFO L754 eck$LassoCheckResult]: Loop: 219#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 222#L12 assume !(main_~i~0#1 < 0); 223#L18-2 assume !!(0 != main_~i~0#1); 220#L10 assume !(main_~i~0#1 < 0);main_~i~0#1 := main_~i~0#1 - 2; 213#L18 assume !(main_~i~0#1 > 0); 214#L18-2 assume !!(0 != main_~i~0#1); 219#L10 [2022-07-14 14:51:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 2 times [2022-07-14 14:51:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579155803] [2022-07-14 14:51:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,839 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1310830950, now seen corresponding path program 1 times [2022-07-14 14:51:22,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666158849] [2022-07-14 14:51:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,844 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 14:51:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 590073037, now seen corresponding path program 1 times [2022-07-14 14:51:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 14:51:22,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323134924] [2022-07-14 14:51:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 14:51:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 14:51:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,850 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 14:51:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 14:51:22,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 14:51:22,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.07 02:51:22 BoogieIcfgContainer [2022-07-14 14:51:22,888 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-14 14:51:22,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 14:51:22,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 14:51:22,888 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 14:51:22,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 02:51:21" (3/4) ... [2022-07-14 14:51:22,890 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-07-14 14:51:22,913 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 14:51:22,913 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 14:51:22,913 INFO L158 Benchmark]: Toolchain (without parser) took 1491.18ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 63.8MB in the beginning and 75.4MB in the end (delta: -11.6MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2022-07-14 14:51:22,914 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory was 51.2MB in the beginning and 51.1MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:51:22,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 132.87ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 74.1MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 14:51:22,914 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.18ms. Allocated memory is still 96.5MB. Free memory was 74.1MB in the beginning and 72.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:51:22,914 INFO L158 Benchmark]: Boogie Preprocessor took 9.26ms. Allocated memory is still 96.5MB. Free memory was 72.6MB in the beginning and 71.7MB in the end (delta: 895.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 14:51:22,915 INFO L158 Benchmark]: RCFGBuilder took 124.76ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 63.6MB in the end (delta: 8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 14:51:22,915 INFO L158 Benchmark]: BuchiAutomizer took 1176.42ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 63.6MB in the beginning and 77.3MB in the end (delta: -13.7MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-07-14 14:51:22,915 INFO L158 Benchmark]: Witness Printer took 24.70ms. Allocated memory is still 119.5MB. Free memory was 76.4MB in the beginning and 75.4MB in the end (delta: 920.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 14:51:22,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory was 51.2MB in the beginning and 51.1MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 132.87ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 74.1MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.18ms. Allocated memory is still 96.5MB. Free memory was 74.1MB in the beginning and 72.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 9.26ms. Allocated memory is still 96.5MB. Free memory was 72.6MB in the beginning and 71.7MB in the end (delta: 895.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 124.76ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 63.6MB in the end (delta: 8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 1176.42ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 63.6MB in the beginning and 77.3MB in the end (delta: -13.7MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * Witness Printer took 24.70ms. Allocated memory is still 119.5MB. Free memory was 76.4MB in the beginning and 75.4MB in the end (delta: 920.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (3 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.1s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 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 [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 39 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 31 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI3 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax163 hnf100 lsp61 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq152 hnf96 smp71 dnf100 smp100 tf110 neg90 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 10]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {i=-1, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@471b18aa=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i != 0 Loop: [L10] COND TRUE i < 0 [L11] i = i+2 [L12] COND FALSE !(i < 0) [L9] COND TRUE i != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) [L9] COND TRUE i != 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-07-14 14:51:22,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)