./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/a.10.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/a.10.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 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 14:12:39,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:12:39,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:12:39,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:12:39,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:12:39,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:12:39,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:12:39,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:12:39,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:12:39,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:12:39,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:12:39,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:12:39,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:12:39,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:12:39,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:12:39,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:12:39,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:12:39,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:12:39,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:12:39,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:12:39,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:12:39,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:12:39,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:12:39,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:12:39,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:12:39,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:12:39,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:12:39,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:12:39,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:12:39,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:12:39,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:12:39,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:12:39,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:12:39,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:12:39,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:12:39,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:12:39,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:12:39,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:12:39,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:12:39,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:12:39,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:12:39,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:12:40,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:12:40,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:12:40,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:12:40,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:12:40,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:12:40,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:12:40,184 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:12:40,184 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:12:40,184 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:12:40,184 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:12:40,184 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:12:40,185 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:12:40,189 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:12:40,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:12:40,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:12:40,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:12:40,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:12:40,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:12:40,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:12:40,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:12:40,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:12:40,191 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:12:40,191 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:12:40,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:12:40,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:12:40,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:12:40,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:12:40,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:12:40,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:12:40,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:12:40,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b [2021-08-27 14:12:40,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:12:40,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:12:40,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:12:40,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:12:40,483 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:12:40,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/a.10.c [2021-08-27 14:12:40,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52ad54f2/28b0c540c05e4ce7a6618d02ac3af26c/FLAG3d0f8fdf8 [2021-08-27 14:12:40,961 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:12:40,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/a.10.c [2021-08-27 14:12:40,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52ad54f2/28b0c540c05e4ce7a6618d02ac3af26c/FLAG3d0f8fdf8 [2021-08-27 14:12:40,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52ad54f2/28b0c540c05e4ce7a6618d02ac3af26c [2021-08-27 14:12:40,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:12:40,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:12:40,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:12:40,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:12:40,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:12:40,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:12:40" (1/1) ... [2021-08-27 14:12:40,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fc24d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:40, skipping insertion in model container [2021-08-27 14:12:40,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:12:40" (1/1) ... [2021-08-27 14:12:40,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:12:41,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:12:41,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:12:41,137 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:12:41,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:12:41,159 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:12:41,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41 WrapperNode [2021-08-27 14:12:41,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:12:41,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:12:41,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:12:41,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:12:41,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:12:41,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:12:41,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:12:41,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:12:41,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:12:41,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:12:41,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:12:41,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:12:41,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (1/1) ... [2021-08-27 14:12:41,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:41,262 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) [2021-08-27 14:12:41,287 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 [2021-08-27 14:12:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:12:41,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:12:41,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:12:41,445 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 14:12:41,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:41 BoogieIcfgContainer [2021-08-27 14:12:41,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:12:41,448 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:12:41,448 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:12:41,451 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:12:41,451 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:41,452 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:12:40" (1/3) ... [2021-08-27 14:12:41,452 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d9847d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:12:41, skipping insertion in model container [2021-08-27 14:12:41,453 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:41,453 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:41" (2/3) ... [2021-08-27 14:12:41,453 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d9847d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:12:41, skipping insertion in model container [2021-08-27 14:12:41,453 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:41,453 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:41" (3/3) ... [2021-08-27 14:12:41,454 INFO L389 chiAutomizerObserver]: Analyzing ICFG a.10.c [2021-08-27 14:12:41,501 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:12:41,502 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:12:41,502 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:12:41,502 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:12:41,502 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:12:41,502 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:12:41,502 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:12:41,502 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:12:41,513 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:41,540 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:41,540 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:41,540 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:41,544 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:12:41,545 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:12:41,545 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:12:41,545 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:41,546 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:41,546 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:41,546 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:41,546 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:12:41,547 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:12:41,552 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 3#L12-2true [2021-08-27 14:12:41,553 INFO L793 eck$LassoCheckResult]: Loop: 3#L12-2true assume !!!(main_~x~0 == main_~y~0); 8#L12true assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 3#L12-2true [2021-08-27 14:12:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 14:12:41,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:41,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411272904] [2021-08-27 14:12:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:41,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,626 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,646 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-08-27 14:12:41,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:41,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626540802] [2021-08-27 14:12:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:41,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,658 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,670 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-08-27 14:12:41,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:41,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144085573] [2021-08-27 14:12:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:41,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,681 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:41,694 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:41,773 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:41,774 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:41,774 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:41,774 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:41,774 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:12:41,774 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:41,774 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:41,775 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:41,775 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-08-27 14:12:41,775 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:41,775 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:41,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:41,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:41,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:41,918 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:41,919 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:12:41,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:41,933 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) [2021-08-27 14:12:41,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:41,942 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:41,952 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 [2021-08-27 14:12:41,964 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:12:41,964 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: [] [2021-08-27 14:12:41,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-08-27 14:12:41,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:41,984 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) [2021-08-27 14:12:41,985 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 [2021-08-27 14:12:41,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:41,987 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:42,009 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:12:42,009 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: [] [2021-08-27 14:12:42,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-27 14:12:42,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,027 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) [2021-08-27 14:12:42,031 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 [2021-08-27 14:12:42,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:42,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:42,067 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 [2021-08-27 14:12:42,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,073 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) [2021-08-27 14:12:42,074 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 [2021-08-27 14:12:42,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:12:42,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:42,180 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:12:42,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:42,191 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:42,191 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:42,191 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:42,191 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:42,191 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:12:42,192 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,192 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:42,192 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:42,192 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-08-27 14:12:42,192 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:42,192 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:42,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,287 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:42,291 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:12:42,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,293 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) [2021-08-27 14:12:42,299 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 [2021-08-27 14:12:42,302 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 [2021-08-27 14:12:42,309 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:42,310 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:42,310 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:12:42,310 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:42,316 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:12:42,316 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:12:42,332 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:12:42,349 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 [2021-08-27 14:12:42,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,351 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) [2021-08-27 14:12:42,353 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 [2021-08-27 14:12:42,355 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 [2021-08-27 14:12:42,362 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:42,362 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:42,362 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:12:42,362 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:42,366 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:12:42,366 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:12:42,401 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:12:42,425 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 [2021-08-27 14:12:42,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,429 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) [2021-08-27 14:12:42,440 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 [2021-08-27 14:12:42,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:42,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:12:42,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:42,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:12:42,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:42,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:12:42,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:12:42,453 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 [2021-08-27 14:12:42,476 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:12:42,482 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 14:12:42,482 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 14:12:42,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,485 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) [2021-08-27 14:12:42,486 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 [2021-08-27 14:12:42,487 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:12:42,487 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:12:42,488 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:12:42,488 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2021-08-27 14:12:42,508 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 [2021-08-27 14:12:42,510 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:12:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:42,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:42,620 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 14:12:42,621 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:42,657 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 23 states and 30 transitions. Complement of second has 6 states. [2021-08-27 14:12:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-08-27 14:12:42,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2021-08-27 14:12:42,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:42,662 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 14:12:42,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:42,662 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2021-08-27 14:12:42,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:42,663 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2021-08-27 14:12:42,665 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:42,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2021-08-27 14:12:42,668 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-27 14:12:42,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-08-27 14:12:42,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-08-27 14:12:42,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:12:42,669 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:12:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-08-27 14:12:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-27 14:12:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-08-27 14:12:42,685 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:12:42,685 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-27 14:12:42,685 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:12:42,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-08-27 14:12:42,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:42,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:42,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:42,686 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 14:12:42,687 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:12:42,687 INFO L791 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 69#L12-2 assume !!!(main_~x~0 == main_~y~0); 67#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 63#L12-2 [2021-08-27 14:12:42,687 INFO L793 eck$LassoCheckResult]: Loop: 63#L12-2 assume !!!(main_~x~0 == main_~y~0); 64#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 63#L12-2 [2021-08-27 14:12:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-08-27 14:12:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:42,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073498185] [2021-08-27 14:12:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:42,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:42,693 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:42,696 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-08-27 14:12:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:42,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119822529] [2021-08-27 14:12:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:42,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:42,701 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:42,703 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:42,704 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2021-08-27 14:12:42,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:42,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696185738] [2021-08-27 14:12:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:42,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:42,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:12:42,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696185738] [2021-08-27 14:12:42,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696185738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:12:42,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16540057] [2021-08-27 14:12:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:42,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:12:42,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:12:42,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 14:12:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:42,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-08-27 14:12:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:42,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16540057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:12:42,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 14:12:42,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-27 14:12:42,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265335035] [2021-08-27 14:12:42,912 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:42,913 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:42,913 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:42,913 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:42,913 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:12:42,913 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,913 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:42,913 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:42,914 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-08-27 14:12:42,914 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:42,914 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:42,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:42,983 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:42,983 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:12:42,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:42,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:42,985 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) [2021-08-27 14:12:42,994 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:42,994 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:43,008 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 [2021-08-27 14:12:43,013 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:12:43,014 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: [] [2021-08-27 14:12:43,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:43,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,040 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) [2021-08-27 14:12:43,044 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 [2021-08-27 14:12:43,046 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:43,046 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:43,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:43,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,096 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:12:43,104 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:12:43,104 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:43,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 14:12:43,205 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:12:43,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:43,208 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:43,208 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:43,209 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:43,209 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:43,209 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:12:43,209 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,209 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:43,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:43,209 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-08-27 14:12:43,209 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:43,209 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:43,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,276 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:43,277 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:12:43,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,278 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) [2021-08-27 14:12:43,280 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 [2021-08-27 14:12:43,281 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:12:43,290 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:43,290 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:12:43,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:43,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:12:43,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:43,293 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:12:43,293 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:12:43,312 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:12:43,318 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 14:12:43,318 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 14:12:43,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,320 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) [2021-08-27 14:12:43,323 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:12:43,323 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:12:43,323 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:12:43,323 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-08-27 14:12:43,336 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 [2021-08-27 14:12:43,348 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 [2021-08-27 14:12:43,349 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:12:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:43,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:43,424 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 14:12:43,424 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 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) [2021-08-27 14:12:43,432 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 [2021-08-27 14:12:43,433 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 11 states and 16 transitions. Complement of second has 5 states. [2021-08-27 14:12:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-08-27 14:12:43,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 14:12:43,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:43,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-08-27 14:12:43,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:43,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-08-27 14:12:43,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:43,436 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2021-08-27 14:12:43,436 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:43,437 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2021-08-27 14:12:43,437 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-08-27 14:12:43,437 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 14:12:43,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2021-08-27 14:12:43,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:12:43,438 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-27 14:12:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2021-08-27 14:12:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-27 14:12:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2021-08-27 14:12:43,444 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-27 14:12:43,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:12:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 14:12:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 14:12:43,448 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2021-08-27 14:12:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:12:43,479 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2021-08-27 14:12:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 14:12:43,479 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2021-08-27 14:12:43,480 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:43,481 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2021-08-27 14:12:43,481 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 14:12:43,481 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 14:12:43,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-08-27 14:12:43,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:12:43,482 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-08-27 14:12:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-08-27 14:12:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2021-08-27 14:12:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-08-27 14:12:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-08-27 14:12:43,484 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-27 14:12:43,484 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-27 14:12:43,484 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 14:12:43,484 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-08-27 14:12:43,486 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:43,486 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:43,486 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:43,486 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 14:12:43,487 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:12:43,487 INFO L791 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 158#L12-2 assume !!!(main_~x~0 == main_~y~0); 154#L12 [2021-08-27 14:12:43,487 INFO L793 eck$LassoCheckResult]: Loop: 154#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 153#L12-2 assume !!!(main_~x~0 == main_~y~0); 154#L12 [2021-08-27 14:12:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:43,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 14:12:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:43,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400549730] [2021-08-27 14:12:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:43,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,507 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,510 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2021-08-27 14:12:43,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:43,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433094395] [2021-08-27 14:12:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:43,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,517 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,521 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2021-08-27 14:12:43,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:43,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411069970] [2021-08-27 14:12:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:43,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,536 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:43,540 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:43,558 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:43,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:43,558 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:43,558 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:43,558 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:12:43,559 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,559 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:43,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:43,559 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-08-27 14:12:43,559 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:43,559 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:43,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:43,629 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:43,630 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:12:43,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,631 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) [2021-08-27 14:12:43,637 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:43,638 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:43,644 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 [2021-08-27 14:12:43,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:43,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:43,690 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) [2021-08-27 14:12:43,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:12:43,698 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:43,714 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 [2021-08-27 14:12:45,974 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:12:45,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-08-27 14:12:45,979 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:45,979 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:45,979 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:45,979 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:45,979 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:12:45,979 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:45,979 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:45,980 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:45,980 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-08-27 14:12:45,980 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:45,980 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:45,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:45,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:45,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:46,066 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:46,066 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:12:46,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:46,069 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) [2021-08-27 14:12:46,078 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 [2021-08-27 14:12:46,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:46,086 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:12:46,086 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:46,086 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 14:12:46,086 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:46,088 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 14:12:46,088 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:12:46,091 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 [2021-08-27 14:12:46,103 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:12:46,107 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 14:12:46,107 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 14:12:46,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:46,111 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) [2021-08-27 14:12:46,116 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 [2021-08-27 14:12:46,117 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:12:46,117 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:12:46,117 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:12:46,117 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-08-27 14:12:46,135 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 [2021-08-27 14:12:46,135 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:12:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:46,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:46,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:46,214 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 [2021-08-27 14:12:46,215 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:46,226 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 11 states and 13 transitions. Complement of second has 5 states. [2021-08-27 14:12:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-08-27 14:12:46,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-08-27 14:12:46,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:46,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 14:12:46,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:46,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2021-08-27 14:12:46,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:46,228 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-08-27 14:12:46,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:46,229 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-08-27 14:12:46,229 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-27 14:12:46,229 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-08-27 14:12:46,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-08-27 14:12:46,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:12:46,230 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-08-27 14:12:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-08-27 14:12:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2021-08-27 14:12:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-08-27 14:12:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2021-08-27 14:12:46,231 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-27 14:12:46,231 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-27 14:12:46,231 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 14:12:46,231 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2021-08-27 14:12:46,231 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:12:46,232 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:46,232 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:46,232 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2021-08-27 14:12:46,232 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:12:46,232 INFO L791 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 203#L12-2 assume !!!(main_~x~0 == main_~y~0); 204#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 205#L12-2 assume !!!(main_~x~0 == main_~y~0); 206#L12 [2021-08-27 14:12:46,232 INFO L793 eck$LassoCheckResult]: Loop: 206#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 208#L12-2 assume !!!(main_~x~0 == main_~y~0); 206#L12 [2021-08-27 14:12:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2021-08-27 14:12:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51370084] [2021-08-27 14:12:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:46,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:46,237 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:46,240 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2021-08-27 14:12:46,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:46,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465444357] [2021-08-27 14:12:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:46,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:46,244 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:46,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2021-08-27 14:12:46,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:46,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993652242] [2021-08-27 14:12:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:46,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:46,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:12:46,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993652242] [2021-08-27 14:12:46,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993652242] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:12:46,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:12:46,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 14:12:46,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58784214] [2021-08-27 14:12:46,323 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 [2021-08-27 14:12:46,324 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:46,324 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:46,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:46,324 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:46,324 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:12:46,324 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,324 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:46,324 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:46,324 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-08-27 14:12:46,324 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:46,325 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:46,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:46,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:46,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:46,396 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:46,396 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:12:46,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:46,398 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) [2021-08-27 14:12:46,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:46,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:46,423 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 [2021-08-27 14:12:46,427 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:12:46,428 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 14:12:46,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 14:12:46,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:46,453 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) [2021-08-27 14:12:46,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:12:46,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:46,465 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 [2021-08-27 14:12:46,491 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 [2021-08-27 14:12:46,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:46,492 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) [2021-08-27 14:12:46,494 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 [2021-08-27 14:12:46,495 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:12:46,495 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:12:48,770 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:12:48,774 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 [2021-08-27 14:12:48,774 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:12:48,774 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:12:48,774 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:12:48,775 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:12:48,775 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:12:48,775 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:48,775 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:12:48,775 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:12:48,775 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-08-27 14:12:48,775 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:12:48,775 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:12:48,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:48,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:48,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:12:48,850 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:12:48,851 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:12:48,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:48,853 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) [2021-08-27 14:12:48,854 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 [2021-08-27 14:12:48,855 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 [2021-08-27 14:12:48,861 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:48,861 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:48,861 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:12:48,861 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:48,864 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:12:48,864 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:12:48,882 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:12:48,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-08-27 14:12:48,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:48,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:48,898 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2021-08-27 14:12:48,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-27 14:12:48,908 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 [2021-08-27 14:12:48,914 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:12:48,914 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:12:48,914 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:12:48,914 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 14:12:48,914 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:12:48,916 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 14:12:48,916 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:12:48,918 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:12:48,921 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 14:12:48,921 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 14:12:48,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:48,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:48,922 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) [2021-08-27 14:12:48,922 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 [2021-08-27 14:12:48,923 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:12:48,923 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:12:48,923 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:12:48,923 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-08-27 14:12:48,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-08-27 14:12:48,939 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:12:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:48,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:49,018 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 [2021-08-27 14:12:49,018 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,024 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-08-27 14:12:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-27 14:12:49,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 14:12:49,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:49,025 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 14:12:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:49,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:49,093 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 [2021-08-27 14:12:49,094 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,099 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-08-27 14:12:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-27 14:12:49,100 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 14:12:49,100 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:49,100 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 14:12:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:12:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:49,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 14:12:49,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:12:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:12:49,160 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 [2021-08-27 14:12:49,160 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,171 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 8 states and 9 transitions. Complement of second has 4 states. [2021-08-27 14:12:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:12:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 14:12:49,172 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 14:12:49,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:49,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-08-27 14:12:49,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:49,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2021-08-27 14:12:49,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:12:49,174 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-08-27 14:12:49,174 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:12:49,174 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2021-08-27 14:12:49,174 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 14:12:49,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 14:12:49,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 14:12:49,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:12:49,175 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:12:49,175 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:12:49,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:12:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 14:12:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 14:12:49,176 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:12:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:12:49,180 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 14:12:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 14:12:49,180 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 14:12:49,180 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:12:49,180 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 14:12:49,180 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 14:12:49,181 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 14:12:49,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 14:12:49,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:12:49,181 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:12:49,181 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:12:49,181 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:12:49,181 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 14:12:49,181 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 14:12:49,181 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:12:49,182 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 14:12:49,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:12:49 BoogieIcfgContainer [2021-08-27 14:12:49,186 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:12:49,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:12:49,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:12:49,187 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:12:49,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:41" (3/4) ... [2021-08-27 14:12:49,189 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 14:12:49,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:12:49,190 INFO L168 Benchmark]: Toolchain (without parser) took 8206.62 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 34.9 MB in the beginning and 56.8 MB in the end (delta: -21.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:49,191 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:49,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.29 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 26.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:49,198 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 56.6 MB. Free memory was 26.2 MB in the beginning and 40.1 MB in the end (delta: -13.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:49,199 INFO L168 Benchmark]: Boogie Preprocessor took 16.07 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 39.2 MB in the end (delta: 939.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:49,199 INFO L168 Benchmark]: RCFGBuilder took 219.57 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 30.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:49,199 INFO L168 Benchmark]: BuchiAutomizer took 7737.84 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 30.7 MB in the beginning and 56.8 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:49,200 INFO L168 Benchmark]: Witness Printer took 2.62 ms. Allocated memory is still 77.6 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:49,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.29 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 26.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 56.6 MB. Free memory was 26.2 MB in the beginning and 40.1 MB in the end (delta: -13.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.07 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 39.2 MB in the end (delta: 939.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 219.57 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 30.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 7737.84 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 30.7 MB in the beginning and 56.8 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.62 ms. Allocated memory is still 77.6 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * y and consists of 4 locations. One deterministic module has affine ranking function x + -1 * y and consists of 3 locations. One deterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. [2021-08-27 14:12:49,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.6s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 6.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 17.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 42 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.4ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax202 hnf100 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 40ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 14:12:49,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-27 14:12:49,432 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...