./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-new/nested-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/loop-new/nested-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 15:23:01,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 15:23:01,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 15:23:01,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 15:23:01,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 15:23:01,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 15:23:01,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 15:23:01,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 15:23:01,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 15:23:01,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 15:23:01,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 15:23:01,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 15:23:01,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 15:23:01,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 15:23:01,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 15:23:01,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 15:23:01,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 15:23:01,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 15:23:01,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 15:23:01,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 15:23:01,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 15:23:01,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 15:23:01,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 15:23:01,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 15:23:01,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 15:23:01,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 15:23:01,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 15:23:01,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 15:23:01,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 15:23:01,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 15:23:01,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 15:23:01,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 15:23:01,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 15:23:01,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 15:23:01,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 15:23:01,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 15:23:01,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 15:23:01,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 15:23:01,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 15:23:01,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 15:23:01,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 15:23:01,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 15:23:01,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 15:23:01,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 15:23:01,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 15:23:01,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 15:23:01,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 15:23:01,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 15:23:01,831 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 15:23:01,831 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 15:23:01,831 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 15:23:01,831 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 15:23:01,831 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 15:23:01,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 15:23:01,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 15:23:01,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 15:23:01,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 15:23:01,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 15:23:01,834 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 15:23:01,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 [2021-08-27 15:23:02,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 15:23:02,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 15:23:02,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 15:23:02,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 15:23:02,086 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 15:23:02,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/nested-1.i [2021-08-27 15:23:02,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05070e1c7/e28c8ab944a24869915d2630fb1ead65/FLAGd71cffffe [2021-08-27 15:23:02,447 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 15:23:02,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i [2021-08-27 15:23:02,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05070e1c7/e28c8ab944a24869915d2630fb1ead65/FLAGd71cffffe [2021-08-27 15:23:02,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05070e1c7/e28c8ab944a24869915d2630fb1ead65 [2021-08-27 15:23:02,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 15:23:02,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 15:23:02,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 15:23:02,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 15:23:02,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 15:23:02,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:23:02" (1/1) ... [2021-08-27 15:23:02,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd796e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:02, skipping insertion in model container [2021-08-27 15:23:02,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:23:02" (1/1) ... [2021-08-27 15:23:02,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 15:23:02,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 15:23:02,995 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i[891,904] [2021-08-27 15:23:03,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:23:03,006 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 15:23:03,014 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i[891,904] [2021-08-27 15:23:03,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:23:03,026 INFO L208 MainTranslator]: Completed translation [2021-08-27 15:23:03,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03 WrapperNode [2021-08-27 15:23:03,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 15:23:03,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 15:23:03,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 15:23:03,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 15:23:03,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 15:23:03,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 15:23:03,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 15:23:03,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 15:23:03,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 15:23:03,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 15:23:03,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 15:23:03,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 15:23:03,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (1/1) ... [2021-08-27 15:23:03,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:03,141 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 15:23:03,167 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 15:23:03,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 15:23:03,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 15:23:03,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 15:23:03,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 15:23:03,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 15:23:03,369 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-27 15:23:03,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:23:03 BoogieIcfgContainer [2021-08-27 15:23:03,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 15:23:03,371 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 15:23:03,371 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 15:23:03,373 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 15:23:03,374 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:23:03,374 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 03:23:02" (1/3) ... [2021-08-27 15:23:03,374 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4aa7bb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:23:03, skipping insertion in model container [2021-08-27 15:23:03,375 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:23:03,375 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:23:03" (2/3) ... [2021-08-27 15:23:03,375 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4aa7bb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:23:03, skipping insertion in model container [2021-08-27 15:23:03,375 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:23:03,375 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:23:03" (3/3) ... [2021-08-27 15:23:03,376 INFO L389 chiAutomizerObserver]: Analyzing ICFG nested-1.i [2021-08-27 15:23:03,432 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 15:23:03,438 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 15:23:03,438 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 15:23:03,438 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 15:23:03,438 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 15:23:03,438 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 15:23:03,439 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 15:23:03,439 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 15:23:03,450 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:03,464 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 15:23:03,464 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:23:03,464 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:23:03,468 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 15:23:03,468 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:23:03,468 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 15:23:03,468 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:03,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 15:23:03,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:23:03,471 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:23:03,471 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 15:23:03,471 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:23:03,476 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 7#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 6#L29true assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 5#L30true assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 9#L31-3true [2021-08-27 15:23:03,476 INFO L793 eck$LassoCheckResult]: Loop: 9#L31-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 13#L32-3true assume !true; 15#L31-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 9#L31-3true [2021-08-27 15:23:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 1 times [2021-08-27 15:23:03,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:03,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127229454] [2021-08-27 15:23:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:03,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,568 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,608 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash 50037, now seen corresponding path program 1 times [2021-08-27 15:23:03,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:03,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062173102] [2021-08-27 15:23:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:03,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:03,657 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 15:23:03,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:23:03,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062173102] [2021-08-27 15:23:03,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062173102] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 15:23:03,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 15:23:03,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 15:23:03,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986650354] [2021-08-27 15:23:03,663 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 15:23:03,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:23:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-27 15:23:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-27 15:23:03,681 INFO L87 Difference]: Start difference. First operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:23:03,685 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-08-27 15:23:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 15:23:03,686 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2021-08-27 15:23:03,688 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 15:23:03,690 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 8 states and 9 transitions. [2021-08-27 15:23:03,691 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-08-27 15:23:03,691 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-08-27 15:23:03,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-08-27 15:23:03,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:23:03,692 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-27 15:23:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-08-27 15:23:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-27 15:23:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 15:23:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-08-27 15:23:03,708 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-27 15:23:03,708 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-27 15:23:03,708 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 15:23:03,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2021-08-27 15:23:03,709 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 15:23:03,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:23:03,710 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:23:03,710 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 15:23:03,710 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:23:03,711 INFO L791 eck$LassoCheckResult]: Stem: 40#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 41#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 45#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 42#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 43#L31-3 [2021-08-27 15:23:03,711 INFO L793 eck$LassoCheckResult]: Loop: 43#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 39#L32-3 assume !(main_~j~0 < main_~m~0); 44#L31-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 43#L31-3 [2021-08-27 15:23:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 2 times [2021-08-27 15:23:03,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:03,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593407226] [2021-08-27 15:23:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:03,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,736 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,756 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 49851, now seen corresponding path program 1 times [2021-08-27 15:23:03,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:03,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199495861] [2021-08-27 15:23:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:03,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,763 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:03,768 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1806910836, now seen corresponding path program 1 times [2021-08-27 15:23:03,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:03,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207954158] [2021-08-27 15:23:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:03,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:03,811 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 15:23:03,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:23:03,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207954158] [2021-08-27 15:23:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207954158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 15:23:03,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 15:23:03,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 15:23:03,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830657077] [2021-08-27 15:23:03,845 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:03,845 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:03,845 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:03,846 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:03,846 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:23:03,846 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:03,846 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:03,846 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:03,846 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration2_Loop [2021-08-27 15:23:03,846 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:03,846 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:03,856 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 15:23:03,863 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 15:23:03,869 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 15:23:03,931 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:03,932 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:23:03,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:03,934 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 15:23:03,935 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 15:23:03,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:23:03,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:03,962 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 15:23:03,962 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~j~0=0, ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~j~0=0, ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 15:23:03,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 15:23:03,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:03,984 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 15:23:03,985 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 15:23:03,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:23:03,986 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:04,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 15:23:04,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,021 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 15:23:04,029 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 15:23:04,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:23:04,030 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:04,135 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:23:04,140 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 15:23:04,140 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:04,140 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:04,140 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:04,141 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:04,141 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:23:04,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:04,141 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:04,141 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration2_Loop [2021-08-27 15:23:04,141 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:04,141 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:04,142 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 15:23:04,149 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 15:23:04,154 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 15:23:04,183 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:04,186 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:23:04,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,189 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 15:23:04,207 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 15:23:04,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:23:04,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:23:04,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:23:04,215 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:23:04,215 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:23:04,218 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:23:04,218 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:23:04,220 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 15:23:04,233 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:23:04,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-08-27 15:23:04,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,250 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 15:23:04,255 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 15:23:04,257 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 15:23:04,263 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:23:04,263 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:23:04,263 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:23:04,263 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:23:04,263 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:23:04,264 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:23:04,264 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:23:04,272 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:23:04,280 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 15:23:04,280 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 15:23:04,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,282 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 15:23:04,283 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 15:23:04,283 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:23:04,283 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:23:04,284 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:23:04,284 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 15:23:04,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-08-27 15:23:04,302 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:23:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:04,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:23:04,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:04,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:04,421 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 15:23:04,423 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 15:23:04,423 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:23:04,438 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 15:23:04,445 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 13 states and 17 transitions. Complement of second has 4 states. [2021-08-27 15:23:04,445 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 15:23:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:23:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-08-27 15:23:04,447 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2021-08-27 15:23:04,447 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:04,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-08-27 15:23:04,448 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:04,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2021-08-27 15:23:04,448 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:04,448 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 17 transitions. [2021-08-27 15:23:04,449 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 15:23:04,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 12 states and 15 transitions. [2021-08-27 15:23:04,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 15:23:04,449 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-08-27 15:23:04,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2021-08-27 15:23:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:23:04,449 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 15:23:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2021-08-27 15:23:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-08-27 15:23:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-08-27 15:23:04,450 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-08-27 15:23:04,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:23:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 15:23:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 15:23:04,451 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:23:04,468 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-08-27 15:23:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 15:23:04,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2021-08-27 15:23:04,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 15:23:04,471 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 18 transitions. [2021-08-27 15:23:04,471 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-08-27 15:23:04,472 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-08-27 15:23:04,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 18 transitions. [2021-08-27 15:23:04,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:23:04,472 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-08-27 15:23:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 18 transitions. [2021-08-27 15:23:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-08-27 15:23:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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 15:23:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-08-27 15:23:04,476 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 15:23:04,477 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 15:23:04,477 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 15:23:04,477 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2021-08-27 15:23:04,478 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 15:23:04,478 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:23:04,478 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:23:04,479 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 15:23:04,479 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 15:23:04,479 INFO L791 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 133#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 137#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 134#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 135#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 129#L32-3 [2021-08-27 15:23:04,479 INFO L793 eck$LassoCheckResult]: Loop: 129#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 128#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 129#L32-3 [2021-08-27 15:23:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash 28695852, now seen corresponding path program 1 times [2021-08-27 15:23:04,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:04,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836248338] [2021-08-27 15:23:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:04,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,503 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,518 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1859, now seen corresponding path program 1 times [2021-08-27 15:23:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:04,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990052842] [2021-08-27 15:23:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:04,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,527 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,530 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1806910894, now seen corresponding path program 1 times [2021-08-27 15:23:04,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:04,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180716065] [2021-08-27 15:23:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:04,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,545 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:04,558 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:04,584 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:04,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:04,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:04,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:04,585 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:23:04,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:04,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:04,585 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration3_Loop [2021-08-27 15:23:04,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:04,585 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:04,588 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 15:23:04,594 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 15:23:04,596 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 15:23:04,599 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 15:23:04,631 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:04,632 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:23:04,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,637 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 15:23:04,639 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 15:23:04,640 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:23:04,640 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:04,678 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 15:23:04,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,680 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 15:23:04,681 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 15:23:04,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:23:04,683 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:04,796 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:23:04,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 15:23:04,802 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:04,803 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:04,803 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:04,803 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:04,803 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:23:04,803 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,803 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:04,803 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:04,803 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration3_Loop [2021-08-27 15:23:04,803 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:04,803 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:04,804 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 15:23:04,810 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 15:23:04,813 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 15:23:04,816 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 15:23:04,850 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:04,851 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:23:04,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:23:04,863 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 15:23:04,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 15:23:04,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:23:04,872 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:23:04,872 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:23:04,872 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:23:04,872 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:23:04,875 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:23:04,875 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:23:04,892 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:23:04,898 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 15:23:04,898 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 15:23:04,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:04,899 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 15:23:04,900 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 15:23:04,901 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:23:04,901 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:23:04,901 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:23:04,901 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~m~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~m~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-08-27 15:23:04,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 15:23:04,924 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:23:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:23:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:04,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:04,978 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 15:23:04,978 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 15:23:04,978 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:23:05,009 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 15:23:05,013 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 31 transitions. Complement of second has 7 states. [2021-08-27 15:23:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:23:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:23:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-08-27 15:23:05,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2021-08-27 15:23:05,014 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2021-08-27 15:23:05,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,015 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 4 letters. [2021-08-27 15:23:05,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,015 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2021-08-27 15:23:05,017 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 15:23:05,018 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 17 states and 21 transitions. [2021-08-27 15:23:05,018 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-27 15:23:05,018 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 15:23:05,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 21 transitions. [2021-08-27 15:23:05,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:23:05,018 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-08-27 15:23:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 21 transitions. [2021-08-27 15:23:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-08-27 15:23:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-27 15:23:05,023 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-27 15:23:05,023 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-27 15:23:05,023 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 15:23:05,023 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2021-08-27 15:23:05,024 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 15:23:05,024 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:23:05,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:23:05,025 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 15:23:05,025 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 15:23:05,025 INFO L791 eck$LassoCheckResult]: Stem: 213#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 214#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 218#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 215#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 216#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 217#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 211#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 212#L32-3 assume !(main_~j~0 < main_~m~0); 219#L31-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 220#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 210#L32-3 [2021-08-27 15:23:05,025 INFO L793 eck$LassoCheckResult]: Loop: 210#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 209#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 210#L32-3 [2021-08-27 15:23:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:05,026 INFO L82 PathProgramCache]: Analyzing trace with hash 857348446, now seen corresponding path program 1 times [2021-08-27 15:23:05,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:05,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140975628] [2021-08-27 15:23:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:05,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,062 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 15:23:05,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:23:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140975628] [2021-08-27 15:23:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140975628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:23:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801456590] [2021-08-27 15:23:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:05,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 15:23:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:05,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 15:23:05,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 15:23:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,186 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 15:23:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801456590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:23:05,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 15:23:05,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-27 15:23:05,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565261086] [2021-08-27 15:23:05,186 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 15:23:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1859, now seen corresponding path program 2 times [2021-08-27 15:23:05,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:23:05,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504950188] [2021-08-27 15:23:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:23:05,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:23:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:05,200 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:23:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:23:05,206 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:23:05,223 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:05,223 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:05,223 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:05,223 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:05,223 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:23:05,223 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,223 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:05,223 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:05,223 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration4_Loop [2021-08-27 15:23:05,223 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:05,223 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:05,225 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 15:23:05,231 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 15:23:05,233 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 15:23:05,234 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 15:23:05,265 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:05,265 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:23:05,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:05,266 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 15:23:05,267 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 15:23:05,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:23:05,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:05,307 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 15:23:05,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:05,309 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 15:23:05,310 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 15:23:05,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:23:05,312 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:23:05,417 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:23:05,419 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 15:23:05,420 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:23:05,420 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:23:05,420 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:23:05,420 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:23:05,420 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:23:05,420 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,420 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:23:05,420 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:23:05,420 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration4_Loop [2021-08-27 15:23:05,420 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:23:05,420 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:23:05,421 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 15:23:05,430 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 15:23:05,432 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 15:23:05,434 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 15:23:05,458 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:23:05,459 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:23:05,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:05,459 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 15:23:05,460 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 15:23:05,462 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 15:23:05,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:23:05,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:23:05,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:23:05,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:23:05,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:23:05,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:23:05,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:23:05,474 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:23:05,494 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 15:23:05,494 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 15:23:05,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:23:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:23:05,509 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 15:23:05,524 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:23:05,524 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:23:05,524 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:23:05,524 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~m~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~m~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-08-27 15:23:05,538 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 15:23:05,541 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 15:23:05,541 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:23:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,608 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 15:23:05,609 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 15:23:05,609 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,618 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 20 states and 25 transitions. Complement of second has 7 states. [2021-08-27 15:23:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:23:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-08-27 15:23:05,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-08-27 15:23:05,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,625 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 15:23:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:05,655 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 15:23:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,702 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 15:23:05,703 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 15:23:05,703 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,710 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 20 states and 25 transitions. Complement of second has 7 states. [2021-08-27 15:23:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:23:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-08-27 15:23:05,711 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-08-27 15:23:05,711 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,711 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 15:23:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:23:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:23:05,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:23:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:23:05,771 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 15:23:05,771 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 15:23:05,771 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,779 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 17 states and 21 transitions. Complement of second has 6 states. [2021-08-27 15:23:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:23:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2021-08-27 15:23:05,780 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 2 letters. [2021-08-27 15:23:05,780 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,780 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 2 letters. [2021-08-27 15:23:05,781 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,781 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 4 letters. [2021-08-27 15:23:05,781 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:23:05,781 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 21 transitions. [2021-08-27 15:23:05,781 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:23:05,781 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 0 states and 0 transitions. [2021-08-27 15:23:05,781 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 15:23:05,781 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 15:23:05,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 15:23:05,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:23:05,781 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:23:05,781 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:23:05,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:23:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 15:23:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-08-27 15:23:05,782 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:23:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:23:05,782 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 15:23:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 15:23:05,782 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 15:23:05,782 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:23:05,782 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 15:23:05,782 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 15:23:05,782 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 15:23:05,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 15:23:05,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:23:05,783 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:23:05,783 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:23:05,783 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:23:05,783 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 15:23:05,783 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 15:23:05,783 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:23:05,783 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 15:23:05,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 03:23:05 BoogieIcfgContainer [2021-08-27 15:23:05,787 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 15:23:05,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 15:23:05,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 15:23:05,787 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 15:23:05,787 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:23:03" (3/4) ... [2021-08-27 15:23:05,789 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 15:23:05,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 15:23:05,790 INFO L168 Benchmark]: Toolchain (without parser) took 2892.41 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 38.1 MB in the beginning and 31.5 MB in the end (delta: 6.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. [2021-08-27 15:23:05,790 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.1 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:23:05,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.33 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 28.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 15:23:05,791 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.68 ms. Allocated memory is still 58.7 MB. Free memory was 28.3 MB in the beginning and 43.2 MB in the end (delta: -14.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 15:23:05,791 INFO L168 Benchmark]: Boogie Preprocessor took 29.00 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 42.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:23:05,791 INFO L168 Benchmark]: RCFGBuilder took 253.20 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 30.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 15:23:05,792 INFO L168 Benchmark]: BuchiAutomizer took 2415.64 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 30.0 MB in the beginning and 32.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2021-08-27 15:23:05,792 INFO L168 Benchmark]: Witness Printer took 2.10 ms. Allocated memory is still 88.1 MB. Free memory is still 31.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:23:05,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.1 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 127.33 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 28.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.68 ms. Allocated memory is still 58.7 MB. Free memory was 28.3 MB in the beginning and 43.2 MB in the end (delta: -14.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.00 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 42.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 253.20 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 30.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2415.64 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 30.0 MB in the beginning and 32.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.10 ms. Allocated memory is still 88.1 MB. Free memory is still 31.5 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 (3 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function m + -1 * j and consists of 4 locations. One nondeterministic module has affine ranking function m + -1 * j and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.3s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 1.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 3. Automata minimization 17.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 12 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 63 SDtfs, 42 SDslu, 13 SDs, 0 SdLazy, 44 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.4ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT1 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp65 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 45ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 15:23:05,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 15:23:06,041 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...