./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.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 0d6528b7cc69fe4ab1ae178e84639571fa28bd084493b226ea467e9ac1e22d5f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:46:51,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:46:51,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:46:51,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:46:51,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:46:51,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:46:51,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:46:51,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:46:51,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:46:51,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:46:51,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:46:51,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:46:51,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:46:51,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:46:51,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:46:51,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:46:51,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:46:51,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:46:51,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:46:51,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:46:51,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:46:51,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:46:51,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:46:51,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:46:51,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:46:51,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:46:51,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:46:51,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:46:51,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:46:51,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:46:51,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:46:51,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:46:51,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:46:51,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:46:51,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:46:51,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:46:51,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:46:51,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:46:51,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:46:51,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:46:51,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:46:51,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-22 19:46:51,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:46:51,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:46:51,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:46:51,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:46:51,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:46:51,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:46:51,984 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:46:51,984 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-22 19:46:51,984 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-22 19:46:51,984 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-22 19:46:51,985 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-22 19:46:51,985 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-22 19:46:51,986 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-22 19:46:51,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:46:51,986 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:46:51,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:46:51,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:46:51,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-22 19:46:51,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-22 19:46:51,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-22 19:46:51,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:46:51,987 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-22 19:46:51,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:46:51,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-22 19:46:51,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:46:51,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:46:51,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:46:51,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:46:51,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:46:51,990 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-22 19:46:51,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d6528b7cc69fe4ab1ae178e84639571fa28bd084493b226ea467e9ac1e22d5f [2021-12-22 19:46:52,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:46:52,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:46:52,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:46:52,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:46:52,291 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:46:52,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2021-12-22 19:46:52,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd7f56d5/5a03c795052445b1aaf8e91c41c7ed4d/FLAG83db2e1e4 [2021-12-22 19:46:52,781 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:46:52,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2021-12-22 19:46:52,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd7f56d5/5a03c795052445b1aaf8e91c41c7ed4d/FLAG83db2e1e4 [2021-12-22 19:46:52,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd7f56d5/5a03c795052445b1aaf8e91c41c7ed4d [2021-12-22 19:46:52,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:46:52,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:46:52,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:46:52,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:46:52,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:46:52,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:52" (1/1) ... [2021-12-22 19:46:52,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e9c9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:52, skipping insertion in model container [2021-12-22 19:46:52,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:52" (1/1) ... [2021-12-22 19:46:52,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:46:52,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:46:53,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:46:53,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:46:53,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:46:53,024 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:46:53,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53 WrapperNode [2021-12-22 19:46:53,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:46:53,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:46:53,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:46:53,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:46:53,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,055 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-22 19:46:53,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:46:53,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:46:53,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:46:53,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:46:53,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:46:53,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:46:53,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:46:53,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:46:53,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (1/1) ... [2021-12-22 19:46:53,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:53,108 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) [2021-12-22 19:46:53,137 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 [2021-12-22 19:46:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:46:53,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:46:53,200 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:46:53,202 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:46:53,286 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:46:53,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:46:53,292 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 19:46:53,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:53 BoogieIcfgContainer [2021-12-22 19:46:53,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:46:53,297 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-22 19:46:53,297 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-22 19:46:53,300 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-22 19:46:53,301 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:53,301 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.12 07:46:52" (1/3) ... [2021-12-22 19:46:53,302 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@255806c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:46:53, skipping insertion in model container [2021-12-22 19:46:53,302 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:53,303 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:53" (2/3) ... [2021-12-22 19:46:53,303 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@255806c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:46:53, skipping insertion in model container [2021-12-22 19:46:53,303 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:53,303 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:53" (3/3) ... [2021-12-22 19:46:53,305 INFO L388 chiAutomizerObserver]: Analyzing ICFG PodelskiRybalchenko-TACAS2011-Fig2.c [2021-12-22 19:46:53,352 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-22 19:46:53,352 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-22 19:46:53,353 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-22 19:46:53,353 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-22 19:46:53,353 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-22 19:46:53,353 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-22 19:46:53,353 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-22 19:46:53,353 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-22 19:46:53,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:53,382 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:53,383 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:53,383 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:53,387 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-22 19:46:53,387 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:53,388 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-22 19:46:53,388 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:53,389 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:53,390 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:53,390 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:53,390 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-22 19:46:53,390 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:53,396 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 5#L17-2true [2021-12-22 19:46:53,397 INFO L793 eck$LassoCheckResult]: Loop: 5#L17-2true assume !!(main_~x~0#1 >= 0);main_~y~0#1 := 1; 3#L19-2true assume !(main_~y~0#1 < main_~x~0#1); 10#L19-3true main_~x~0#1 := main_~x~0#1 - 1; 5#L17-2true [2021-12-22 19:46:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-22 19:46:53,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:53,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920008659] [2021-12-22 19:46:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:53,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,479 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,499 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash 40944, now seen corresponding path program 1 times [2021-12-22 19:46:53,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:53,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278765027] [2021-12-22 19:46:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:53,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,525 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,536 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 28699886, now seen corresponding path program 1 times [2021-12-22 19:46:53,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:53,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867983025] [2021-12-22 19:46:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:53,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,552 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:53,562 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:53,654 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:53,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:53,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:53,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:53,655 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:53,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,655 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:53,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:53,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2021-12-22 19:46:53,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:53,656 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:53,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:53,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:53,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:53,780 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:53,781 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:53,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:53,785 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) [2021-12-22 19:46:53,788 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:53,788 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:53,806 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 [2021-12-22 19:46:53,823 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:53,824 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: [] [2021-12-22 19:46:53,854 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 [2021-12-22 19:46:53,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:53,858 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) [2021-12-22 19:46:53,859 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 [2021-12-22 19:46:53,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:53,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:53,896 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:53,896 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: [] [2021-12-22 19:46:53,922 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 [2021-12-22 19:46:53,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:53,925 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) [2021-12-22 19:46:53,934 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 [2021-12-22 19:46:53,934 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:53,935 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:53,994 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 [2021-12-22 19:46:53,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:53,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,000 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) [2021-12-22 19:46:54,002 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 [2021-12-22 19:46:54,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:54,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:54,065 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:54,073 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 [2021-12-22 19:46:54,073 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:54,073 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:54,073 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:54,073 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:54,074 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:54,074 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,074 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:54,074 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:54,074 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2021-12-22 19:46:54,074 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:54,074 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:54,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,160 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:54,164 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:54,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,167 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) [2021-12-22 19:46:54,168 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 [2021-12-22 19:46:54,172 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 [2021-12-22 19:46:54,181 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:54,181 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:54,182 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:54,182 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:54,186 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:54,186 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:54,208 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:54,235 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 [2021-12-22 19:46:54,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,237 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) [2021-12-22 19:46:54,239 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 [2021-12-22 19:46:54,240 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 [2021-12-22 19:46:54,248 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:54,248 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:54,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:54,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:54,249 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:54,253 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:54,253 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:54,269 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:54,273 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:54,273 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:54,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,277 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) [2021-12-22 19:46:54,280 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:54,280 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:54,280 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:54,281 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = 2*ULTIMATE.start_main_~x~0#1 + 1 Supporting invariants [] [2021-12-22 19:46:54,304 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 [2021-12-22 19:46:54,309 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 [2021-12-22 19:46:54,312 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:54,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:54,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:54,453 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 [2021-12-22 19:46:54,454 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:54,507 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 36 transitions. Complement of second has 7 states. [2021-12-22 19:46:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2021-12-22 19:46:54,517 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 2 letters. Loop has 3 letters. [2021-12-22 19:46:54,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:54,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 5 letters. Loop has 3 letters. [2021-12-22 19:46:54,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:54,519 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 2 letters. Loop has 6 letters. [2021-12-22 19:46:54,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:54,520 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 36 transitions. [2021-12-22 19:46:54,522 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:46:54,525 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 8 states and 11 transitions. [2021-12-22 19:46:54,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-12-22 19:46:54,526 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-12-22 19:46:54,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2021-12-22 19:46:54,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:54,527 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-22 19:46:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2021-12-22 19:46:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-12-22 19:46:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-12-22 19:46:54,547 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-12-22 19:46:54,547 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-12-22 19:46:54,547 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-22 19:46:54,547 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-12-22 19:46:54,548 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:46:54,548 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:54,548 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:54,548 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-22 19:46:54,548 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-12-22 19:46:54,549 INFO L791 eck$LassoCheckResult]: Stem: 80#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 81#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 78#L17-2 assume !!(main_~x~0#1 >= 0);main_~y~0#1 := 1; 75#L19-2 [2021-12-22 19:46:54,549 INFO L793 eck$LassoCheckResult]: Loop: 75#L19-2 assume !!(main_~y~0#1 < main_~x~0#1);main_~y~0#1 := 1 + main_~y~0#1; 75#L19-2 [2021-12-22 19:46:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-12-22 19:46:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152293114] [2021-12-22 19:46:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:54,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,559 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,565 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 1 times [2021-12-22 19:46:54,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831268362] [2021-12-22 19:46:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:54,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,578 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,586 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash 925804, now seen corresponding path program 1 times [2021-12-22 19:46:54,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546947150] [2021-12-22 19:46:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:54,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,598 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:54,610 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:54,633 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:54,634 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:54,634 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:54,634 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:54,634 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:54,639 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,639 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:54,639 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:54,639 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2021-12-22 19:46:54,639 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:54,640 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:54,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,692 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:54,692 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:54,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,696 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) [2021-12-22 19:46:54,696 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 [2021-12-22 19:46:54,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:54,729 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:54,747 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:54,747 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-22 19:46:54,767 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 [2021-12-22 19:46:54,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-22 19:46:54,770 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:54,770 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:54,781 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:54,782 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-22 19:46:54,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:54,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:54,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-22 19:46:54,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:54,803 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:54,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:54,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:54,832 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:54,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-22 19:46:54,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:54,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:54,959 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:54,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:54,964 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:54,964 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:54,964 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:54,964 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:54,964 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:54,964 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:54,964 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:54,964 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:54,964 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2021-12-22 19:46:54,964 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:54,964 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:54,965 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:54,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,005 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:55,005 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:55,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-22 19:46:55,018 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 [2021-12-22 19:46:55,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:55,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:55,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:55,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:55,028 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:55,028 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:55,045 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:55,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,070 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-22 19:46:55,072 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 [2021-12-22 19:46:55,079 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:55,079 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:55,079 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:55,079 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:55,082 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:55,082 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:55,096 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:55,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-22 19:46:55,135 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 [2021-12-22 19:46:55,143 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:55,144 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:55,144 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:55,144 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:55,144 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:55,145 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:55,145 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:55,147 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:55,150 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:55,150 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:55,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-22 19:46:55,155 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:55,155 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:55,155 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:55,155 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1, ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~y~0#1 + 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-22 19:46:55,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,185 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,212 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-12-22 19:46:55,212 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-22 19:46:55,229 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 14 states and 19 transitions. Complement of second has 5 states. [2021-12-22 19:46:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-22 19:46:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-12-22 19:46:55,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 1 letters. [2021-12-22 19:46:55,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:55,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 4 letters. Loop has 1 letters. [2021-12-22 19:46:55,235 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:55,235 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-12-22 19:46:55,235 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:55,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 19 transitions. [2021-12-22 19:46:55,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:46:55,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 10 states and 14 transitions. [2021-12-22 19:46:55,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-12-22 19:46:55,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-12-22 19:46:55,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 14 transitions. [2021-12-22 19:46:55,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:55,244 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 14 transitions. [2021-12-22 19:46:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 14 transitions. [2021-12-22 19:46:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 7. [2021-12-22 19:46:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2021-12-22 19:46:55,246 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-22 19:46:55,246 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-22 19:46:55,246 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-22 19:46:55,246 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2021-12-22 19:46:55,247 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-12-22 19:46:55,247 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:55,247 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:55,248 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-12-22 19:46:55,248 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-12-22 19:46:55,248 INFO L791 eck$LassoCheckResult]: Stem: 133#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 134#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 131#L17-2 assume !!(main_~x~0#1 >= 0);main_~y~0#1 := 1; 129#L19-2 assume !(main_~y~0#1 < main_~x~0#1); 130#L19-3 main_~x~0#1 := main_~x~0#1 - 1; 132#L17-2 assume !!(main_~x~0#1 >= 0);main_~y~0#1 := 1; 128#L19-2 [2021-12-22 19:46:55,248 INFO L793 eck$LassoCheckResult]: Loop: 128#L19-2 assume !!(main_~y~0#1 < main_~x~0#1);main_~y~0#1 := 1 + main_~y~0#1; 128#L19-2 [2021-12-22 19:46:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 889696477, now seen corresponding path program 2 times [2021-12-22 19:46:55,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066958649] [2021-12-22 19:46:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:55,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:55,253 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:55,257 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,257 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 2 times [2021-12-22 19:46:55,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:55,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435175795] [2021-12-22 19:46:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:55,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:55,261 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:55,264 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1810787031, now seen corresponding path program 1 times [2021-12-22 19:46:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704124021] [2021-12-22 19:46:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:55,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:46:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704124021] [2021-12-22 19:46:55,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704124021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:46:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838951186] [2021-12-22 19:46:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:55,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:46:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 19:46:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,421 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 [2021-12-22 19:46:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:46:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838951186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:46:55,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:46:55,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 19:46:55,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937246600] [2021-12-22 19:46:55,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:46:55,513 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:55,514 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:55,514 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:55,514 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:55,514 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:55,514 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,514 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:55,515 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:55,515 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2021-12-22 19:46:55,515 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:55,515 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:55,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,554 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:55,554 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:55,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-22 19:46:55,558 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:55,558 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:55,570 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:55,570 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-22 19:46:55,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,589 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-22 19:46:55,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:55,596 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:55,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-22 19:46:55,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:55,625 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:55,754 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:55,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,758 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:55,758 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:55,758 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:55,758 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:55,758 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:55,758 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,758 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:55,758 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:55,759 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2021-12-22 19:46:55,759 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:55,759 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:55,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-22 19:46:55,797 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:55,797 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:55,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,799 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-22 19:46:55,801 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 [2021-12-22 19:46:55,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:55,807 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:55,807 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:55,807 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:55,809 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:55,809 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:55,830 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:55,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-12-22 19:46:55,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-22 19:46:55,850 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 [2021-12-22 19:46:55,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:55,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:55,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:55,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:55,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:55,858 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:55,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:55,860 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:55,865 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-22 19:46:55,865 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-22 19:46:55,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:55,867 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:55,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-22 19:46:55,869 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:55,870 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:55,870 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:55,870 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1, ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~y~0#1 + 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-12-22 19:46:55,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:55,886 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,932 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-12-22 19:46:55,932 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:55,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 16 transitions. Complement of second has 5 states. [2021-12-22 19:46:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-12-22 19:46:55,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 6 letters. Loop has 1 letters. [2021-12-22 19:46:55,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:55,950 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-22 19:46:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:55,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:55,985 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2021-12-22 19:46:55,985 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:55,996 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 16 transitions. Complement of second has 5 states. [2021-12-22 19:46:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-12-22 19:46:55,998 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 6 letters. Loop has 1 letters. [2021-12-22 19:46:55,999 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:55,999 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-22 19:46:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:56,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:56,031 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-12-22 19:46:56,031 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:56,040 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 10 states and 12 transitions. Complement of second has 4 states. [2021-12-22 19:46:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2021-12-22 19:46:56,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 6 letters. Loop has 1 letters. [2021-12-22 19:46:56,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:56,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 1 letters. [2021-12-22 19:46:56,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:56,043 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 6 letters. Loop has 2 letters. [2021-12-22 19:46:56,043 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:56,043 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2021-12-22 19:46:56,043 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-22 19:46:56,044 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2021-12-22 19:46:56,044 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-22 19:46:56,044 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-22 19:46:56,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-22 19:46:56,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:46:56,044 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:56,044 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:56,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:46:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 19:46:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:46:56,048 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:46:56,050 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-12-22 19:46:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 19:46:56,051 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-12-22 19:46:56,051 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-22 19:46:56,051 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 19:46:56,051 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-22 19:46:56,051 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-22 19:46:56,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-22 19:46:56,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:46:56,051 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:56,052 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:56,052 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:56,052 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-22 19:46:56,052 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-22 19:46:56,052 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-22 19:46:56,052 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-22 19:46:56,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.12 07:46:56 BoogieIcfgContainer [2021-12-22 19:46:56,057 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-22 19:46:56,058 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 19:46:56,058 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 19:46:56,058 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 19:46:56,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:53" (3/4) ... [2021-12-22 19:46:56,061 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 19:46:56,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 19:46:56,061 INFO L158 Benchmark]: Toolchain (without parser) took 3247.91ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 84.0MB in the beginning and 83.9MB in the end (delta: 142.0kB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2021-12-22 19:46:56,062 INFO L158 Benchmark]: CDTParser took 0.62ms. Allocated memory is still 109.1MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:56,062 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.83ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 87.4MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:46:56,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.89ms. Allocated memory is still 109.1MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:56,063 INFO L158 Benchmark]: Boogie Preprocessor took 18.02ms. Allocated memory is still 109.1MB. Free memory was 86.0MB in the beginning and 85.1MB in the end (delta: 887.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 19:46:56,063 INFO L158 Benchmark]: RCFGBuilder took 218.92ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 77.3MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-22 19:46:56,064 INFO L158 Benchmark]: BuchiAutomizer took 2760.72ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 77.1MB in the beginning and 84.6MB in the end (delta: -7.5MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2021-12-22 19:46:56,064 INFO L158 Benchmark]: Witness Printer took 2.95ms. Allocated memory is still 136.3MB. Free memory is still 83.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:56,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62ms. Allocated memory is still 109.1MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.83ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 87.4MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.89ms. Allocated memory is still 109.1MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.02ms. Allocated memory is still 109.1MB. Free memory was 86.0MB in the beginning and 85.1MB in the end (delta: 887.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 218.92ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 77.3MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 2760.72ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 77.1MB in the beginning and 84.6MB in the end (delta: -7.5MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. * Witness Printer took 2.95ms. Allocated memory is still 136.3MB. Free memory is still 83.9MB. 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 (1 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * y + x and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39 IncrementalHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 20 mSDtfsCounter, 39 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf100 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq159 hnf93 smp100 dnf100 smp100 tf111 neg98 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 42ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-22 19:46:56,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-12-22 19:46:56,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:56,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE