./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 ff03de63 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-dev-ff03de6 [2021-12-21 21:57:14,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 21:57:14,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 21:57:14,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 21:57:14,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 21:57:14,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 21:57:14,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 21:57:14,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 21:57:14,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 21:57:14,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 21:57:14,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 21:57:14,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 21:57:14,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 21:57:14,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 21:57:14,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 21:57:14,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 21:57:14,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 21:57:14,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 21:57:14,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 21:57:14,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 21:57:14,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 21:57:14,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 21:57:14,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 21:57:14,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 21:57:14,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 21:57:14,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 21:57:14,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 21:57:14,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 21:57:14,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 21:57:14,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 21:57:14,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 21:57:14,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 21:57:14,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 21:57:14,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 21:57:14,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 21:57:14,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 21:57:14,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 21:57:14,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 21:57:14,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 21:57:14,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 21:57:14,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 21:57:14,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-21 21:57:14,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 21:57:14,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 21:57:14,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 21:57:14,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 21:57:14,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 21:57:14,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 21:57:14,799 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 21:57:14,799 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 21:57:14,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 21:57:14,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 21:57:14,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 21:57:14,801 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 21:57:14,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 21:57:14,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 21:57:14,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 21:57:14,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 21:57:14,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 21:57:14,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 21:57:14,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 21:57:14,802 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 21:57:14,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9816d5cc9e8c1fba9291af90498afaa319416e5c56fa3cf3ce8da9d63d3e9939 [2021-12-21 21:57:14,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 21:57:14,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 21:57:14,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 21:57:14,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 21:57:14,964 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 21:57:14,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-12-21 21:57:15,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e45db6/fd4c0c3faed34bd6a098d5972f08fa7e/FLAG51140c20c [2021-12-21 21:57:15,341 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 21:57:15,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-12-21 21:57:15,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e45db6/fd4c0c3faed34bd6a098d5972f08fa7e/FLAG51140c20c [2021-12-21 21:57:15,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e45db6/fd4c0c3faed34bd6a098d5972f08fa7e [2021-12-21 21:57:15,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 21:57:15,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 21:57:15,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 21:57:15,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 21:57:15,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 21:57:15,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e538fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15, skipping insertion in model container [2021-12-21 21:57:15,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 21:57:15,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 21:57:15,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:57:15,534 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 21:57:15,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:57:15,550 INFO L208 MainTranslator]: Completed translation [2021-12-21 21:57:15,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15 WrapperNode [2021-12-21 21:57:15,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 21:57:15,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 21:57:15,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 21:57:15,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 21:57:15,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,569 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-21 21:57:15,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 21:57:15,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 21:57:15,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 21:57:15,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 21:57:15,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 21:57:15,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 21:57:15,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 21:57:15,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 21:57:15,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (1/1) ... [2021-12-21 21:57:15,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:15,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:15,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-21 21:57:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 21:57:15,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 21:57:15,667 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 21:57:15,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 21:57:15,737 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 21:57:15,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 21:57:15,742 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 21:57:15,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:15 BoogieIcfgContainer [2021-12-21 21:57:15,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 21:57:15,744 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 21:57:15,745 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 21:57:15,747 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 21:57:15,747 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:57:15,747 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 09:57:15" (1/3) ... [2021-12-21 21:57:15,748 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7975ab72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:57:15, skipping insertion in model container [2021-12-21 21:57:15,748 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:57:15,748 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:15" (2/3) ... [2021-12-21 21:57:15,749 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7975ab72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:57:15, skipping insertion in model container [2021-12-21 21:57:15,750 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:57:15,750 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:15" (3/3) ... [2021-12-21 21:57:15,751 INFO L388 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2021-12-21 21:57:15,800 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 21:57:15,800 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 21:57:15,800 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 21:57:15,800 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 21:57:15,800 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 21:57:15,800 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 21:57:15,801 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 21:57:15,801 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 21:57:15,811 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) [2021-12-21 21:57:15,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 21:57:15,822 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:15,823 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:15,827 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 21:57:15,827 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:57:15,827 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 21:57:15,828 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) [2021-12-21 21:57:15,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 21:57:15,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:15,829 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:15,829 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 21:57:15,829 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:57:15,834 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 10#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; 7#L18-2true [2021-12-21 21:57:15,834 INFO L793 eck$LassoCheckResult]: Loop: 7#L18-2true assume !!(0 != main_~i~0#1); 8#L10true assume !(main_~i~0#1 < 0);main_~i~0#1 := main_~i~0#1 - 2; 4#L18true assume !(main_~i~0#1 > 0); 7#L18-2true [2021-12-21 21:57:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-21 21:57:15,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:15,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847245510] [2021-12-21 21:57:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:15,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,894 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,909 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 41231, now seen corresponding path program 1 times [2021-12-21 21:57:15,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693316675] [2021-12-21 21:57:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:15,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,924 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,931 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 28700173, now seen corresponding path program 1 times [2021-12-21 21:57:15,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:15,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690741011] [2021-12-21 21:57:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:15,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,946 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:15,951 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,019 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:57:16,020 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:57:16,020 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:57:16,020 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:57:16,020 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 21:57:16,020 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,032 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:57:16,032 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:57:16,032 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-12-21 21:57:16,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:57:16,033 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:57:16,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,125 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:57:16,126 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 21:57:16,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-21 21:57:16,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:57:16,134 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:57:16,155 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:57:16,155 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:57:16,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:57:16,178 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:57:16,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-21 21:57:16,197 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:57:16,197 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:57:16,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-21 21:57:16,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:57:16,216 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:57:16,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-21 21:57:16,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 21:57:16,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:57:16,281 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 21:57:16,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,303 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:57:16,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:57:16,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:57:16,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:57:16,303 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 21:57:16,303 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,303 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:57:16,303 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:57:16,303 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-12-21 21:57:16,303 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:57:16,304 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:57:16,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:57:16,370 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:57:16,373 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 21:57:16,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,377 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 [2021-12-21 21:57:16,378 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:57:16,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:57:16,384 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:57:16,384 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:57:16,384 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:57:16,389 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-21 21:57:16,389 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-21 21:57:16,404 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:57:16,422 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 [2021-12-21 21:57:16,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-21 21:57:16,425 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:57:16,430 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:57:16,430 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:57:16,430 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:57:16,431 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:57:16,433 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-21 21:57:16,433 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-21 21:57:16,446 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:57:16,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-21 21:57:16,467 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 [2021-12-21 21:57:16,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:57:16,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:57:16,472 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:57:16,472 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:57:16,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:57:16,474 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:57:16,474 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:57:16,485 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 21:57:16,489 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 21:57:16,489 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 21:57:16,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:57:16,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:57:16,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:57:16,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-21 21:57:16,495 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 21:57:16,496 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 21:57:16,496 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 21:57:16,496 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 [] [2021-12-21 21:57:16,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,519 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 21:57:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:57:16,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 21:57:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:57:16,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-21 21:57:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:57:16,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 21:57:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:57:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:57:16,613 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-21 21:57:16,614 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) [2021-12-21 21:57:16,640 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. [2021-12-21 21:57:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-21 21:57:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 21:57:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2021-12-21 21:57:16,646 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 2 letters. Loop has 3 letters. [2021-12-21 21:57:16,646 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:57:16,646 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 5 letters. Loop has 3 letters. [2021-12-21 21:57:16,646 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:57:16,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 2 letters. Loop has 6 letters. [2021-12-21 21:57:16,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:57:16,647 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 47 transitions. [2021-12-21 21:57:16,657 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 21:57:16,662 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 15 states and 22 transitions. [2021-12-21 21:57:16,662 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-12-21 21:57:16,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-12-21 21:57:16,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2021-12-21 21:57:16,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:57:16,663 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-12-21 21:57:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2021-12-21 21:57:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-21 21:57:16,691 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) [2021-12-21 21:57:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-12-21 21:57:16,693 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-12-21 21:57:16,693 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-12-21 21:57:16,693 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-21 21:57:16,693 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 21 transitions. [2021-12-21 21:57:16,694 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 21:57:16,694 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:16,694 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:16,694 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:57:16,694 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:57:16,695 INFO L791 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 91#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~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 [2021-12-21 21:57:16,695 INFO L793 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 [2021-12-21 21:57:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-21 21:57:16,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062858654] [2021-12-21 21:57:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,702 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,704 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 53210, now seen corresponding path program 1 times [2021-12-21 21:57:16,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805389263] [2021-12-21 21:57:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:57:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:57:16,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 21:57:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805389263] [2021-12-21 21:57:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805389263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 21:57:16,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 21:57:16,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-21 21:57:16,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778400064] [2021-12-21 21:57:16,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 21:57:16,729 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 21:57:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 21:57:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 21:57:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 21:57:16,732 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) [2021-12-21 21:57:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 21:57:16,743 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2021-12-21 21:57:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 21:57:16,744 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 23 transitions. [2021-12-21 21:57:16,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:57:16,745 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 23 transitions. [2021-12-21 21:57:16,745 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-12-21 21:57:16,745 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-12-21 21:57:16,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 23 transitions. [2021-12-21 21:57:16,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:57:16,745 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-12-21 21:57:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 23 transitions. [2021-12-21 21:57:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-21 21:57:16,746 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) [2021-12-21 21:57:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2021-12-21 21:57:16,747 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-12-21 21:57:16,747 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-12-21 21:57:16,747 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-21 21:57:16,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2021-12-21 21:57:16,747 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:57:16,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:16,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:16,748 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:57:16,748 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 21:57:16,748 INFO L791 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 126#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 133#L18-2 assume !!(0 != main_~i~0#1); 131#L10 assume main_~i~0#1 < 0;main_~i~0#1 := 2 + main_~i~0#1; 132#L12 [2021-12-21 21:57:16,748 INFO L793 eck$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 [2021-12-21 21:57:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 2 times [2021-12-21 21:57:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404587529] [2021-12-21 21:57:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,752 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,754 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1451465, now seen corresponding path program 1 times [2021-12-21 21:57:16,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578867898] [2021-12-21 21:57:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:57:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:57:16,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 21:57:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578867898] [2021-12-21 21:57:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578867898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 21:57:16,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 21:57:16,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 21:57:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13521463] [2021-12-21 21:57:16,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 21:57:16,773 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 21:57:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 21:57:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 21:57:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 21:57:16,774 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) [2021-12-21 21:57:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 21:57:16,789 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-12-21 21:57:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 21:57:16,790 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 28 transitions. [2021-12-21 21:57:16,791 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-12-21 21:57:16,791 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 21 states and 27 transitions. [2021-12-21 21:57:16,791 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-21 21:57:16,791 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-21 21:57:16,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 27 transitions. [2021-12-21 21:57:16,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:57:16,792 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-21 21:57:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 27 transitions. [2021-12-21 21:57:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2021-12-21 21:57:16,793 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) [2021-12-21 21:57:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2021-12-21 21:57:16,793 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-12-21 21:57:16,793 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-12-21 21:57:16,793 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-21 21:57:16,793 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 21 transitions. [2021-12-21 21:57:16,794 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-12-21 21:57:16,794 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:16,794 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:16,794 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 21:57:16,794 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-12-21 21:57:16,794 INFO L791 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 [2021-12-21 21:57:16,795 INFO L793 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 [2021-12-21 21:57:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-12-21 21:57:16,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072500637] [2021-12-21 21:57:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,798 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,799 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1310830888, now seen corresponding path program 1 times [2021-12-21 21:57:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457821722] [2021-12-21 21:57:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:57:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:57:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 21:57:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457821722] [2021-12-21 21:57:16,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457821722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 21:57:16,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 21:57:16,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 21:57:16,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414578379] [2021-12-21 21:57:16,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 21:57:16,822 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 21:57:16,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 21:57:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 21:57:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 21:57:16,823 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) [2021-12-21 21:57:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 21:57:16,840 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-12-21 21:57:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 21:57:16,841 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2021-12-21 21:57:16,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-21 21:57:16,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2021-12-21 21:57:16,842 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-21 21:57:16,842 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-12-21 21:57:16,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2021-12-21 21:57:16,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:57:16,843 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-21 21:57:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2021-12-21 21:57:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-12-21 21:57:16,844 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) [2021-12-21 21:57:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-12-21 21:57:16,844 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-12-21 21:57:16,845 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-12-21 21:57:16,845 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-21 21:57:16,845 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2021-12-21 21:57:16,845 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-12-21 21:57:16,845 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:57:16,845 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:57:16,846 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 21:57:16,846 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-12-21 21:57:16,846 INFO L791 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 218#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 221#L18-2 assume !!(0 != main_~i~0#1); 219#L10 [2021-12-21 21:57:16,846 INFO L793 eck$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 [2021-12-21 21:57:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 2 times [2021-12-21 21:57:16,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852007210] [2021-12-21 21:57:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,849 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,850 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1310830950, now seen corresponding path program 1 times [2021-12-21 21:57:16,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813390385] [2021-12-21 21:57:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,853 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,856 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:57:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 590073037, now seen corresponding path program 1 times [2021-12-21 21:57:16,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:57:16,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291033325] [2021-12-21 21:57:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:57:16,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:57:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,860 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:57:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:57:16,862 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:57:16,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 09:57:16 BoogieIcfgContainer [2021-12-21 21:57:16,906 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 21:57:16,906 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 21:57:16,906 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 21:57:16,906 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 21:57:16,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:15" (3/4) ... [2021-12-21 21:57:16,908 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-21 21:57:16,924 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 21:57:16,924 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 21:57:16,924 INFO L158 Benchmark]: Toolchain (without parser) took 1551.50ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 69.6MB in the beginning and 68.0MB in the end (delta: 1.6MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,924 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:57:16,925 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.94ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 69.6MB in the beginning and 101.5MB in the end (delta: -31.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,925 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.43ms. Allocated memory is still 123.7MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:57:16,925 INFO L158 Benchmark]: Boogie Preprocessor took 11.33ms. Allocated memory is still 123.7MB. Free memory was 100.0MB in the beginning and 99.4MB in the end (delta: 561.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,925 INFO L158 Benchmark]: RCFGBuilder took 161.30ms. Allocated memory is still 123.7MB. Free memory was 98.9MB in the beginning and 91.1MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,925 INFO L158 Benchmark]: BuchiAutomizer took 1161.28ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 70.0MB in the end (delta: 20.6MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,926 INFO L158 Benchmark]: Witness Printer took 17.61ms. Allocated memory is still 123.7MB. Free memory was 70.0MB in the beginning and 68.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 21:57:16,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.94ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 69.6MB in the beginning and 101.5MB in the end (delta: -31.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.43ms. Allocated memory is still 123.7MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.33ms. Allocated memory is still 123.7MB. Free memory was 100.0MB in the beginning and 99.4MB in the end (delta: 561.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 161.30ms. Allocated memory is still 123.7MB. Free memory was 98.9MB in the beginning and 91.1MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 1161.28ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 70.0MB in the end (delta: 20.6MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Witness Printer took 17.61ms. Allocated memory is still 123.7MB. Free memory was 70.0MB in the beginning and 68.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 17 states and ocurred in iteration 4. 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: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - 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@7532ba96=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! [2021-12-21 21:57:16,951 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)