./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.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/GopanReps-CAV2006-Fig1a.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 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:46:37,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:46:37,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:46:37,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:46:37,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:46:37,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:46:37,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:46:37,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:46:37,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:46:37,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:46:37,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:46:37,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:46:37,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:46:37,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:46:37,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:46:37,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:46:37,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:46:37,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:46:37,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:46:37,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:46:37,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:46:37,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:46:37,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:46:37,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:46:37,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:46:37,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:46:37,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:46:37,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:46:37,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:46:37,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:46:37,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:46:37,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:46:37,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:46:37,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:46:37,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:46:37,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:46:37,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:46:37,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:46:37,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:46:37,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:46:37,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:46:37,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-22 19:46:37,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:46:37,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:46:37,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:46:37,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:46:37,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:46:37,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:46:37,871 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:46:37,871 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-22 19:46:37,872 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-22 19:46:37,872 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-22 19:46:37,873 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-22 19:46:37,873 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-22 19:46:37,873 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-22 19:46:37,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:46:37,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-22 19:46:37,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:46:37,875 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-22 19:46:37,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:46:37,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-22 19:46:37,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:46:37,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:46:37,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:46:37,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:46:37,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:46:37,877 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-22 19:46:37,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 [2021-12-22 19:46:38,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:46:38,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:46:38,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:46:38,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:46:38,140 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:46:38,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2021-12-22 19:46:38,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c42dea9/1551958237114258906f9d756e6b67d2/FLAGf042fdb76 [2021-12-22 19:46:38,562 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:46:38,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2021-12-22 19:46:38,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c42dea9/1551958237114258906f9d756e6b67d2/FLAGf042fdb76 [2021-12-22 19:46:38,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c42dea9/1551958237114258906f9d756e6b67d2 [2021-12-22 19:46:38,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:46:38,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:46:38,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:46:38,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:46:38,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:46:38,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626cd6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38, skipping insertion in model container [2021-12-22 19:46:38,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:46:38,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:46:38,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:46:38,750 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:46:38,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:46:38,789 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:46:38,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38 WrapperNode [2021-12-22 19:46:38,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:46:38,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:46:38,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:46:38,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:46:38,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,813 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-12-22 19:46:38,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:46:38,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:46:38,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:46:38,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:46:38,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:46:38,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:46:38,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:46:38,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:46:38,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (1/1) ... [2021-12-22 19:46:38,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:38,856 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 19:46:38,858 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 19:46:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:46:38,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:46:38,938 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:46:38,940 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:46:39,022 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:46:39,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:46:39,028 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 19:46:39,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:39 BoogieIcfgContainer [2021-12-22 19:46:39,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:46:39,031 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-22 19:46:39,031 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-22 19:46:39,034 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-22 19:46:39,034 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:39,035 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.12 07:46:38" (1/3) ... [2021-12-22 19:46:39,036 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3e36590c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:46:39, skipping insertion in model container [2021-12-22 19:46:39,036 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:39,036 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:38" (2/3) ... [2021-12-22 19:46:39,036 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3e36590c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:46:39, skipping insertion in model container [2021-12-22 19:46:39,036 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:46:39,037 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:39" (3/3) ... [2021-12-22 19:46:39,038 INFO L388 chiAutomizerObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a.c [2021-12-22 19:46:39,084 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-22 19:46:39,084 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-22 19:46:39,084 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-22 19:46:39,084 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-22 19:46:39,084 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-22 19:46:39,085 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-22 19:46:39,085 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-22 19:46:39,085 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-22 19:46:39,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:39,112 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:39,113 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:39,113 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:39,117 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-22 19:46:39,118 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:39,118 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-22 19:46:39,118 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:39,119 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:39,120 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:39,120 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:39,121 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-22 19:46:39,121 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:39,126 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 6#L18-2true [2021-12-22 19:46:39,127 INFO L793 eck$LassoCheckResult]: Loop: 6#L18-2true assume !!(main_~y~0#1 >= 0); 10#L19true assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 3#L19-2true main_~x~0#1 := 1 + main_~x~0#1; 6#L18-2true [2021-12-22 19:46:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:39,131 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-22 19:46:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919226599] [2021-12-22 19:46:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:39,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:39,207 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:39,225 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 40876, now seen corresponding path program 1 times [2021-12-22 19:46:39,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108535589] [2021-12-22 19:46:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:39,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:39,248 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:39,258 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2021-12-22 19:46:39,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688032523] [2021-12-22 19:46:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:39,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:39,338 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 19:46:39,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:46:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688032523] [2021-12-22 19:46:39,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688032523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:46:39,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:46:39,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:46:39,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330662981] [2021-12-22 19:46:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:46:39,422 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:39,423 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:39,439 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:39,439 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:39,439 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:39,439 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,440 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:39,440 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:39,440 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration1_Loop [2021-12-22 19:46:39,440 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:39,440 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:39,453 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 19:46:39,473 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 19:46:39,478 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 19:46:39,486 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 19:46:39,551 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:39,552 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:39,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,556 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 19:46:39,557 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 19:46:39,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:39,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,604 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 19:46:39,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,608 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 19:46:39,616 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 19:46:39,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:39,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,654 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:39,655 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=51} Honda state: {ULTIMATE.start_main_~x~0#1=51} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=1}, {ULTIMATE.start_main_~x~0#1=0}] Lambdas: [14, 1, 0] Nus: [0, 1] [2021-12-22 19:46:39,679 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 19:46:39,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,681 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 19:46:39,682 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 19:46:39,684 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:39,684 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,712 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:39,712 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 19:46:39,736 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 19:46:39,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,738 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 19:46:39,745 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 19:46:39,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:39,747 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,768 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:39,768 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 19:46:39,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-22 19:46:39,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,787 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 19:46:39,791 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 19:46:39,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:39,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,847 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 19:46:39,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,850 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 19:46:39,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:39,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:39,858 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 19:46:39,886 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:39,889 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 19:46:39,889 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:39,890 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:39,890 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:39,890 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:39,890 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:39,890 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,890 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:39,890 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:39,890 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration1_Loop [2021-12-22 19:46:39,890 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:39,890 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:39,891 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 19:46:39,897 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 19:46:39,900 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 19:46:39,902 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 19:46:39,948 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:39,952 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:39,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:39,954 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 19:46:39,991 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 19:46:39,997 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 19:46:40,005 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:40,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:40,006 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:40,006 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:40,006 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:40,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:40,016 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:40,031 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:40,050 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 19:46:40,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,051 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 19:46:40,061 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 19:46:40,071 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 19:46:40,087 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:40,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:40,087 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:40,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:40,095 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:40,095 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:40,111 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:40,126 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 19:46:40,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,128 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 19:46:40,128 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 19:46:40,130 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 19:46:40,137 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:40,137 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:40,137 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:40,137 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:40,141 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:40,141 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:40,148 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:40,166 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 19:46:40,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,167 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 19:46:40,171 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 19:46:40,171 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 19:46:40,177 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:40,178 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:40,178 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:40,178 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:40,178 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:40,179 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:40,179 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:40,181 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:40,190 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:40,191 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:40,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,193 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 19:46:40,197 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 19:46:40,198 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:40,198 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:40,198 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:40,198 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2021-12-22 19:46:40,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-12-22 19:46:40,217 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:40,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:40,308 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 19:46:40,332 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-22 19:46:40,333 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:40,365 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 29 states and 36 transitions. Complement of second has 8 states. [2021-12-22 19:46:40,367 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 19:46:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2021-12-22 19:46:40,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 2 letters. Loop has 3 letters. [2021-12-22 19:46:40,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:40,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 5 letters. Loop has 3 letters. [2021-12-22 19:46:40,373 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:40,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 2 letters. Loop has 6 letters. [2021-12-22 19:46:40,373 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:40,373 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 36 transitions. [2021-12-22 19:46:40,376 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:40,378 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 12 states and 15 transitions. [2021-12-22 19:46:40,379 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-12-22 19:46:40,379 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-22 19:46:40,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2021-12-22 19:46:40,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:40,380 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-12-22 19:46:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2021-12-22 19:46:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-12-22 19:46:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) 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 19:46:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-12-22 19:46:40,396 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-12-22 19:46:40,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:46:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:46:40,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:46:40,399 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. 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 19:46:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:46:40,413 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-12-22 19:46:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:46:40,414 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-12-22 19:46:40,414 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:40,415 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 9 transitions. [2021-12-22 19:46:40,415 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-22 19:46:40,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-22 19:46:40,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-12-22 19:46:40,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:46:40,415 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-22 19:46:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-12-22 19:46:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-12-22 19:46:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-12-22 19:46:40,416 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-22 19:46:40,416 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-12-22 19:46:40,417 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-22 19:46:40,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-12-22 19:46:40,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:40,417 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:40,417 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:40,417 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-22 19:46:40,417 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:40,418 INFO L791 eck$LassoCheckResult]: Stem: 105#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 106#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 109#L18-2 assume !!(main_~y~0#1 >= 0); 108#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 103#L19-2 [2021-12-22 19:46:40,418 INFO L793 eck$LassoCheckResult]: Loop: 103#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 104#L18-2 assume !!(main_~y~0#1 >= 0); 107#L19 assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 103#L19-2 [2021-12-22 19:46:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-22 19:46:40,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:40,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059833741] [2021-12-22 19:46:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:40,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:40,423 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:40,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 2 times [2021-12-22 19:46:40,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:40,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048367939] [2021-12-22 19:46:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:40,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:40,449 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:40,454 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1810662097, now seen corresponding path program 1 times [2021-12-22 19:46:40,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:40,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994504764] [2021-12-22 19:46:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:40,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:40,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:46:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994504764] [2021-12-22 19:46:40,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994504764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:46:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760704686] [2021-12-22 19:46:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:40,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:46:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,483 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:46:40,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 19:46:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:46:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:46:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:40,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760704686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:46:40,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:46:40,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-22 19:46:40,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122760820] [2021-12-22 19:46:40,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:46:40,606 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:40,607 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:40,607 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:40,607 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:40,607 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:40,607 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,607 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:40,607 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:40,607 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration2_Loop [2021-12-22 19:46:40,608 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:40,608 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:40,609 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 19:46:40,615 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 19:46:40,620 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 19:46:40,622 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 19:46:40,658 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:40,658 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:40,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,700 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 19:46:40,703 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 19:46:40,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:40,705 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:40,727 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:40,727 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 19:46:40,751 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 19:46:40,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,752 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 19:46:40,761 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:40,761 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:40,771 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 19:46:40,814 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 19:46:40,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,815 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 19:46:40,816 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 19:46:40,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:40,817 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:40,854 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:40,854 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=50} Honda state: {ULTIMATE.start_main_~x~0#1=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=1}] Lambdas: [8, 12, 1] Nus: [1, 0] [2021-12-22 19:46:40,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2021-12-22 19:46:40,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,886 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:40,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-22 19:46:40,889 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:40,889 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:40,904 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:40,905 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 19:46:40,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:40,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,930 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 19:46:40,935 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 19:46:40,936 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:40,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:40,958 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 19:46:40,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:40,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:40,959 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 19:46:40,960 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 19:46:40,961 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:40,963 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,005 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:41,012 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 19:46:41,012 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:41,012 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:41,012 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:41,012 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:41,012 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:41,012 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,012 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:41,012 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:41,012 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration2_Loop [2021-12-22 19:46:41,012 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:41,012 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:41,013 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 19:46:41,019 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 19:46:41,022 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 19:46:41,027 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 19:46:41,074 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:41,075 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:41,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,076 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 19:46:41,083 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 19:46:41,084 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 19:46:41,090 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:41,090 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:41,090 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:41,090 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:41,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:41,091 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:41,091 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:41,099 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:41,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-22 19:46:41,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,116 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 19:46:41,116 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 19:46:41,118 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 19:46:41,124 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:41,124 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:41,124 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:41,124 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:41,126 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:41,126 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:41,138 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:41,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,155 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 19:46:41,155 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 19:46:41,157 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 19:46:41,163 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:41,163 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:41,163 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:41,163 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:41,163 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:41,164 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:41,164 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:41,171 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:41,173 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:41,173 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:41,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,179 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 19:46:41,184 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 19:46:41,184 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:41,184 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:41,184 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:41,184 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2021-12-22 19:46:41,200 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 19:46:41,201 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:41,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-12-22 19:46:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:41,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:41,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:41,299 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 19:46:41,300 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 19:46:41,300 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 19:46:41,314 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 13 states and 16 transitions. Complement of second has 7 states. [2021-12-22 19:46:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 19:46:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2021-12-22 19:46:41,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 3 letters. [2021-12-22 19:46:41,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:41,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-22 19:46:41,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:41,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 6 letters. [2021-12-22 19:46:41,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:41,318 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-12-22 19:46:41,321 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:41,322 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 16 transitions. [2021-12-22 19:46:41,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-12-22 19:46:41,322 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-12-22 19:46:41,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 16 transitions. [2021-12-22 19:46:41,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:41,322 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-22 19:46:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 16 transitions. [2021-12-22 19:46:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-22 19:46:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-22 19:46:41,325 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-22 19:46:41,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:46:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:46:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:46:41,327 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 19:46:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:46:41,353 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-22 19:46:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:46:41,355 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 20 transitions. [2021-12-22 19:46:41,358 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-22 19:46:41,359 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 17 states and 18 transitions. [2021-12-22 19:46:41,359 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-22 19:46:41,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-12-22 19:46:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 18 transitions. [2021-12-22 19:46:41,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:46:41,360 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-22 19:46:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 18 transitions. [2021-12-22 19:46:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-22 19:46:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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 19:46:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-22 19:46:41,367 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-22 19:46:41,367 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-22 19:46:41,367 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-22 19:46:41,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 17 transitions. [2021-12-22 19:46:41,368 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-22 19:46:41,368 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:41,368 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:41,369 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1] [2021-12-22 19:46:41,369 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:41,369 INFO L791 eck$LassoCheckResult]: Stem: 242#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 243#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 244#L18-2 assume !!(main_~y~0#1 >= 0); 245#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 240#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 241#L18-2 assume !!(main_~y~0#1 >= 0); 255#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 254#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 253#L18-2 assume !!(main_~y~0#1 >= 0); 252#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 251#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 250#L18-2 assume !!(main_~y~0#1 >= 0); 249#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 247#L19-2 [2021-12-22 19:46:41,370 INFO L793 eck$LassoCheckResult]: Loop: 247#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 248#L18-2 assume !!(main_~y~0#1 >= 0); 246#L19 assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 247#L19-2 [2021-12-22 19:46:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1702507665, now seen corresponding path program 1 times [2021-12-22 19:46:41,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:41,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068180338] [2021-12-22 19:46:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:41,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:41,397 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:41,409 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 3 times [2021-12-22 19:46:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110452337] [2021-12-22 19:46:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:41,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:41,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:41,421 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash -137031896, now seen corresponding path program 2 times [2021-12-22 19:46:41,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:41,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494039695] [2021-12-22 19:46:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:41,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:41,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:46:41,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494039695] [2021-12-22 19:46:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494039695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:46:41,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507621108] [2021-12-22 19:46:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:46:41,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:46:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,484 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 19:46:41,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:46:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:46:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:46:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:41,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:46:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:46:41,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507621108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:46:41,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:46:41,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-22 19:46:41,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333997527] [2021-12-22 19:46:41,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:46:41,675 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:41,676 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:41,676 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:41,676 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:41,676 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:41,676 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,676 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:41,676 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:41,676 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration3_Loop [2021-12-22 19:46:41,676 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:41,676 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:41,677 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 19:46:41,682 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 19:46:41,684 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 19:46:41,688 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 19:46:41,728 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:41,728 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:41,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,729 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:41,735 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-22 19:46:41,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-12-22 19:46:41,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-22 19:46:41,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:41,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,819 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:41,819 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=50} Honda state: {ULTIMATE.start_main_~x~0#1=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=1}] Lambdas: [8, 12, 1] Nus: [1, 0] [2021-12-22 19:46:41,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-22 19:46:41,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,835 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-22 19:46:41,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:41,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,861 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:41,861 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 19:46:41,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:41,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,886 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:41,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-22 19:46:41,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:41,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:41,934 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:41,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-22 19:46:41,936 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:41,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:41,962 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:41,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-12-22 19:46:41,965 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:41,965 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:41,965 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:41,965 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:41,965 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:41,965 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:41,965 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:41,965 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:41,965 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration3_Loop [2021-12-22 19:46:41,965 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:41,965 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:41,966 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 19:46:41,971 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 19:46:41,974 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 19:46:41,982 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 19:46:42,026 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:42,026 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:42,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,027 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,035 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 19:46:42,043 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:42,043 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:42,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:42,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:42,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:42,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:42,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:42,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-12-22 19:46:42,059 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:42,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-12-22 19:46:42,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,076 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-12-22 19:46:42,079 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 19:46:42,085 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:42,085 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:42,085 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:42,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:42,088 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-22 19:46:42,088 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-22 19:46:42,103 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:42,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:42,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,120 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-12-22 19:46:42,127 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 19:46:42,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:42,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:42,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:42,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:42,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:42,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:42,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:42,136 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:42,138 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:42,138 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:42,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,139 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-12-22 19:46:42,141 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:42,141 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:42,141 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:42,141 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2021-12-22 19:46:42,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-12-22 19:46:42,157 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,230 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 19:46:42,231 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 19:46:42,231 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,238 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 18 states and 19 transitions. Complement of second has 7 states. [2021-12-22 19:46:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-12-22 19:46:42,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 13 letters. Loop has 3 letters. [2021-12-22 19:46:42,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,240 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-22 19:46:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,337 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 19:46:42,337 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-12-22 19:46:42,337 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,343 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 18 states and 19 transitions. Complement of second has 7 states. [2021-12-22 19:46:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-12-22 19:46:42,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 13 letters. Loop has 3 letters. [2021-12-22 19:46:42,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,345 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-22 19:46:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,394 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 19:46:42,395 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 2 loop predicates [2021-12-22 19:46:42,395 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,403 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 27 transitions. Complement of second has 6 states. [2021-12-22 19:46:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-12-22 19:46:42,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 13 letters. Loop has 3 letters. [2021-12-22 19:46:42,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 16 letters. Loop has 3 letters. [2021-12-22 19:46:42,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 13 letters. Loop has 6 letters. [2021-12-22 19:46:42,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2021-12-22 19:46:42,406 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:46:42,406 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 19 states and 21 transitions. [2021-12-22 19:46:42,406 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-12-22 19:46:42,406 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-12-22 19:46:42,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2021-12-22 19:46:42,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:42,406 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-22 19:46:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2021-12-22 19:46:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-22 19:46:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:46:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-22 19:46:42,408 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-22 19:46:42,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:46:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 19:46:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-22 19:46:42,409 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 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 19:46:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:46:42,441 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-12-22 19:46:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 19:46:42,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 51 transitions. [2021-12-22 19:46:42,443 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:46:42,444 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 37 states and 39 transitions. [2021-12-22 19:46:42,444 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2021-12-22 19:46:42,444 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2021-12-22 19:46:42,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 39 transitions. [2021-12-22 19:46:42,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-22 19:46:42,444 INFO L681 BuchiCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-12-22 19:46:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 39 transitions. [2021-12-22 19:46:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-22 19:46:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 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 19:46:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-12-22 19:46:42,446 INFO L704 BuchiCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-12-22 19:46:42,446 INFO L587 BuchiCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-12-22 19:46:42,447 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-22 19:46:42,447 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 37 transitions. [2021-12-22 19:46:42,447 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:46:42,447 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:46:42,447 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:46:42,448 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 9, 1, 1] [2021-12-22 19:46:42,448 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-22 19:46:42,448 INFO L791 eck$LassoCheckResult]: Stem: 673#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 674#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 675#L18-2 assume !!(main_~y~0#1 >= 0); 676#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 668#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 669#L18-2 assume !!(main_~y~0#1 >= 0); 702#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 701#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 700#L18-2 assume !!(main_~y~0#1 >= 0); 699#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 698#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 697#L18-2 assume !!(main_~y~0#1 >= 0); 696#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 695#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 694#L18-2 assume !!(main_~y~0#1 >= 0); 693#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 692#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 691#L18-2 assume !!(main_~y~0#1 >= 0); 690#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 689#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 688#L18-2 assume !!(main_~y~0#1 >= 0); 687#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 686#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 685#L18-2 assume !!(main_~y~0#1 >= 0); 684#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 683#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 682#L18-2 assume !!(main_~y~0#1 >= 0); 681#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 680#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 672#L18-2 [2021-12-22 19:46:42,448 INFO L793 eck$LassoCheckResult]: Loop: 672#L18-2 assume !!(main_~y~0#1 >= 0); 679#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 678#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 672#L18-2 [2021-12-22 19:46:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -191897876, now seen corresponding path program 2 times [2021-12-22 19:46:42,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624942911] [2021-12-22 19:46:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:42,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,461 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,471 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash 40814, now seen corresponding path program 1 times [2021-12-22 19:46:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424906732] [2021-12-22 19:46:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:42,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,474 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,486 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash -228141917, now seen corresponding path program 3 times [2021-12-22 19:46:42,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:46:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979189848] [2021-12-22 19:46:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:46:42,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:46:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,513 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:46:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:46:42,523 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:46:42,539 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:42,539 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:42,539 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:42,539 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:42,539 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-22 19:46:42,540 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,540 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:42,540 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:42,540 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration4_Loop [2021-12-22 19:46:42,540 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:42,540 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:42,541 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 19:46:42,544 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 19:46:42,548 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 19:46:42,550 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 19:46:42,594 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:42,594 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-22 19:46:42,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,596 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-12-22 19:46:42,597 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:42,597 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:42,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-12-22 19:46:42,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,620 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-22 19:46:42,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-12-22 19:46:42,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:42,622 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:42,637 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-22 19:46:42,637 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0#1=0} Honda state: {ULTIMATE.start_main_~y~0#1=0} Generalized eigenvectors: [{ULTIMATE.start_main_~y~0#1=0}, {ULTIMATE.start_main_~y~0#1=0}, {ULTIMATE.start_main_~y~0#1=1}] Lambdas: [1, 0, 1] Nus: [0, 0] [2021-12-22 19:46:42,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-12-22 19:46:42,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,653 INFO L229 MonitoredProcess]: Starting monitored process 36 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 19:46:42,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-12-22 19:46:42,656 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-22 19:46:42,656 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:42,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:42,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,678 INFO L229 MonitoredProcess]: Starting monitored process 37 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 19:46:42,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-12-22 19:46:42,680 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-22 19:46:42,680 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-22 19:46:42,705 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-22 19:46:42,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-12-22 19:46:42,708 INFO L210 LassoAnalysis]: Preferences: [2021-12-22 19:46:42,708 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-22 19:46:42,708 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-22 19:46:42,708 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-22 19:46:42,708 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-22 19:46:42,709 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,709 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-22 19:46:42,709 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-22 19:46:42,709 INFO L133 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration4_Loop [2021-12-22 19:46:42,709 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-22 19:46:42,709 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-22 19:46:42,709 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 19:46:42,718 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 19:46:42,725 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 19:46:42,727 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 19:46:42,757 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-22 19:46:42,757 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-22 19:46:42,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,758 INFO L229 MonitoredProcess]: Starting monitored process 38 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 19:46:42,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-12-22 19:46:42,763 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 19:46:42,769 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:42,769 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:42,769 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:42,769 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:42,769 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:42,770 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:42,770 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:42,771 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-22 19:46:42,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-12-22 19:46:42,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,787 INFO L229 MonitoredProcess]: Starting monitored process 39 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 19:46:42,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-12-22 19:46:42,789 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 19:46:42,795 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-22 19:46:42,796 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-22 19:46:42,796 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-22 19:46:42,796 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-22 19:46:42,796 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-22 19:46:42,796 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-22 19:46:42,796 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-22 19:46:42,820 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-22 19:46:42,822 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-22 19:46:42,822 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-22 19:46:42,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:46:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:46:42,823 INFO L229 MonitoredProcess]: Starting monitored process 40 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 19:46:42,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-12-22 19:46:42,827 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-22 19:46:42,827 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-22 19:46:42,827 INFO L513 LassoAnalysis]: Proved termination. [2021-12-22 19:46:42,827 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -2*ULTIMATE.start_main_~x~0#1 + 101 Supporting invariants [] [2021-12-22 19:46:42,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:42,844 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-22 19:46:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:46:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:46:42,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:46:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:46:42,945 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 19:46:42,947 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 19:46:42,947 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 37 transitions. cyclomatic complexity: 3 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,961 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 37 transitions. cyclomatic complexity: 3. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 61 states and 65 transitions. Complement of second has 6 states. [2021-12-22 19:46:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-22 19:46:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 19:46:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-22 19:46:42,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 29 letters. Loop has 3 letters. [2021-12-22 19:46:42,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 32 letters. Loop has 3 letters. [2021-12-22 19:46:42,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 29 letters. Loop has 6 letters. [2021-12-22 19:46:42,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-22 19:46:42,965 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 65 transitions. [2021-12-22 19:46:42,971 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-22 19:46:42,971 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 0 states and 0 transitions. [2021-12-22 19:46:42,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-22 19:46:42,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-22 19:46:42,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-22 19:46:42,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:46:42,971 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:42,971 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:42,971 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:46:42,971 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-22 19:46:42,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-22 19:46:42,972 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-22 19:46:42,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-22 19:46:42,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.12 07:46:42 BoogieIcfgContainer [2021-12-22 19:46:42,977 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-22 19:46:42,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 19:46:42,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 19:46:42,977 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 19:46:42,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:39" (3/4) ... [2021-12-22 19:46:42,980 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 19:46:42,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 19:46:42,980 INFO L158 Benchmark]: Toolchain (without parser) took 4389.26ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 59.0MB in the beginning and 40.4MB in the end (delta: 18.6MB). Peak memory consumption was 37.1MB. Max. memory is 16.1GB. [2021-12-22 19:46:42,981 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 47.7MB in the beginning and 47.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:42,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.51ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 59.0MB in the beginning and 85.8MB in the end (delta: -26.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:46:42,981 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.63ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:42,981 INFO L158 Benchmark]: Boogie Preprocessor took 12.98ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 83.7MB in the end (delta: 912.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 19:46:42,982 INFO L158 Benchmark]: RCFGBuilder took 202.01ms. Allocated memory is still 109.1MB. Free memory was 83.7MB in the beginning and 74.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:46:42,982 INFO L158 Benchmark]: BuchiAutomizer took 3945.66ms. Allocated memory is still 109.1MB. Free memory was 74.8MB in the beginning and 40.4MB in the end (delta: 34.3MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2021-12-22 19:46:42,982 INFO L158 Benchmark]: Witness Printer took 2.75ms. Allocated memory is still 109.1MB. Free memory is still 40.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:46:42,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 47.7MB in the beginning and 47.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.51ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 59.0MB in the beginning and 85.8MB in the end (delta: -26.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.63ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.98ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 83.7MB in the end (delta: 912.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 202.01ms. Allocated memory is still 109.1MB. Free memory was 83.7MB in the beginning and 74.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3945.66ms. Allocated memory is still 109.1MB. Free memory was 74.8MB in the beginning and 40.4MB in the end (delta: 34.3MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * Witness Printer took 2.75ms. Allocated memory is still 109.1MB. Free memory is still 40.4MB. 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 7 terminating modules (3 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * y + 1 and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 4 locations. One deterministic module has affine ranking function 101 + -2 * x and consists of 4 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.8s and 5 iterations. TraceHistogramMax:9. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 35 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 60 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 85 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82 IncrementalHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 46 mSDtfsCounter, 82 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax164 hnf100 lsp34 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf94 smp100 dnf100 smp100 tf112 neg95 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 60ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 4 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-22 19:46:43,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:43,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-22 19:46:43,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:46:43,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE