./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ef399329f84d2482fbc6cd637d6b986ccb5018221a1a0504f889d0bed5430f95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 01:25:37,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 01:25:37,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 01:25:38,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 01:25:38,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 01:25:38,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 01:25:38,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 01:25:38,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 01:25:38,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 01:25:38,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 01:25:38,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 01:25:38,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 01:25:38,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 01:25:38,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 01:25:38,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 01:25:38,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 01:25:38,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 01:25:38,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 01:25:38,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 01:25:38,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 01:25:38,060 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 01:25:38,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 01:25:38,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 01:25:38,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 01:25:38,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 01:25:38,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 01:25:38,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 01:25:38,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 01:25:38,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 01:25:38,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 01:25:38,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 01:25:38,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 01:25:38,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 01:25:38,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 01:25:38,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 01:25:38,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 01:25:38,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 01:25:38,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 01:25:38,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 01:25:38,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 01:25:38,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 01:25:38,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 01:25:38,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-22 01:25:38,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 01:25:38,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 01:25:38,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 01:25:38,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 01:25:38,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 01:25:38,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 01:25:38,111 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 01:25:38,112 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 01:25:38,112 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 01:25:38,113 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 01:25:38,113 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 01:25:38,113 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 01:25:38,113 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 01:25:38,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 01:25:38,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 01:25:38,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 01:25:38,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 01:25:38,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 01:25:38,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 01:25:38,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 01:25:38,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 01:25:38,115 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 01:25:38,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 01:25:38,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 01:25:38,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 01:25:38,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 01:25:38,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 01:25:38,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 01:25:38,117 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 01:25:38,118 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef399329f84d2482fbc6cd637d6b986ccb5018221a1a0504f889d0bed5430f95 [2022-07-22 01:25:38,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 01:25:38,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 01:25:38,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 01:25:38,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 01:25:38,443 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 01:25:38,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-22 01:25:38,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3936f0671/99a8767a2fcb413eb68e8167c1414037/FLAG1d43a4670 [2022-07-22 01:25:38,919 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 01:25:38,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-22 01:25:38,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3936f0671/99a8767a2fcb413eb68e8167c1414037/FLAG1d43a4670 [2022-07-22 01:25:38,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3936f0671/99a8767a2fcb413eb68e8167c1414037 [2022-07-22 01:25:38,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 01:25:38,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 01:25:38,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 01:25:38,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 01:25:38,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 01:25:38,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:25:38" (1/1) ... [2022-07-22 01:25:38,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f4f752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:38, skipping insertion in model container [2022-07-22 01:25:38,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:25:38" (1/1) ... [2022-07-22 01:25:38,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 01:25:38,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 01:25:39,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:25:39,086 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 01:25:39,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:25:39,106 INFO L208 MainTranslator]: Completed translation [2022-07-22 01:25:39,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39 WrapperNode [2022-07-22 01:25:39,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 01:25:39,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 01:25:39,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 01:25:39,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 01:25:39,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,166 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-22 01:25:39,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 01:25:39,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 01:25:39,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 01:25:39,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 01:25:39,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 01:25:39,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 01:25:39,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 01:25:39,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 01:25:39,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (1/1) ... [2022-07-22 01:25:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:39,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:39,212 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) [2022-07-22 01:25:39,237 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 [2022-07-22 01:25:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 01:25:39,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 01:25:39,308 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 01:25:39,309 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 01:25:39,396 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 01:25:39,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 01:25:39,401 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 01:25:39,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:25:39 BoogieIcfgContainer [2022-07-22 01:25:39,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 01:25:39,404 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 01:25:39,404 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 01:25:39,406 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 01:25:39,407 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:25:39,407 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 01:25:38" (1/3) ... [2022-07-22 01:25:39,408 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@60c004ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:25:39, skipping insertion in model container [2022-07-22 01:25:39,408 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:25:39,408 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:25:39" (2/3) ... [2022-07-22 01:25:39,408 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@60c004ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:25:39, skipping insertion in model container [2022-07-22 01:25:39,408 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:25:39,408 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:25:39" (3/3) ... [2022-07-22 01:25:39,409 INFO L354 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2022-07-22 01:25:39,469 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 01:25:39,469 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 01:25:39,470 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 01:25:39,470 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 01:25:39,470 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 01:25:39,470 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 01:25:39,470 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 01:25:39,471 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 01:25:39,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:39,493 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-22 01:25:39,493 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:25:39,493 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:25:39,498 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-22 01:25:39,498 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:25:39,498 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 01:25:39,499 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:39,500 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-07-22 01:25:39,500 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:25:39,500 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:25:39,500 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-07-22 01:25:39,501 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:25:39,506 INFO L752 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L19-2true [2022-07-22 01:25:39,506 INFO L754 eck$LassoCheckResult]: Loop: 2#L19-2true assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 6#L21-2true assume !(main_~j~0#1 <= main_~i~0#1); 4#L21-3true main_~i~0#1 := 1 + main_~i~0#1; 2#L19-2true [2022-07-22 01:25:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-07-22 01:25:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:39,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070329484] [2022-07-22 01:25:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:39,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,602 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 40944, now seen corresponding path program 1 times [2022-07-22 01:25:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:39,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951561462] [2022-07-22 01:25:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:39,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,651 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 28699886, now seen corresponding path program 1 times [2022-07-22 01:25:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531693787] [2022-07-22 01:25:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,688 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:39,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:39,787 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:39,788 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:39,788 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:39,788 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:39,788 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:25:39,789 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:39,789 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:39,789 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:39,789 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2022-07-22 01:25:39,789 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:39,790 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:39,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:39,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:39,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:39,905 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:39,906 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:25:39,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:39,910 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) [2022-07-22 01:25:39,911 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 [2022-07-22 01:25:39,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:39,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:39,973 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 [2022-07-22 01:25:39,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:39,980 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) [2022-07-22 01:25:39,982 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 [2022-07-22 01:25:39,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:25:39,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:40,112 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:25:40,116 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 [2022-07-22 01:25:40,117 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:40,117 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:40,117 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:40,117 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:40,117 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:25:40,117 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,117 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:40,117 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:40,117 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2022-07-22 01:25:40,117 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:40,118 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:40,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,206 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:40,210 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:25:40,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,220 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) [2022-07-22 01:25:40,221 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 [2022-07-22 01:25:40,223 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 [2022-07-22 01:25:40,231 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:40,231 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:40,231 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:40,232 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:40,236 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:25:40,236 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:25:40,247 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:25:40,271 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 [2022-07-22 01:25:40,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,277 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) [2022-07-22 01:25:40,286 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 [2022-07-22 01:25:40,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:40,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:40,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:40,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:40,304 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:25:40,305 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:25:40,309 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 [2022-07-22 01:25:40,318 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:25:40,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,345 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) [2022-07-22 01:25:40,347 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 [2022-07-22 01:25:40,348 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 [2022-07-22 01:25:40,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:40,356 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:25:40,357 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:40,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:40,357 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:40,359 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:25:40,359 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:25:40,373 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:25:40,380 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:25:40,380 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:25:40,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,386 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) [2022-07-22 01:25:40,387 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 [2022-07-22 01:25:40,388 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:25:40,388 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:25:40,388 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:25:40,389 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = -1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2022-07-22 01:25:40,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:40,420 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:25:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:40,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:40,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 01:25:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:25:40,571 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-07-22 01:25:40,572 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:40,628 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 49 transitions. Complement of second has 9 states. [2022-07-22 01:25:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-22 01:25:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 29 transitions. [2022-07-22 01:25:40,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 2 letters. Loop has 3 letters. [2022-07-22 01:25:40,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:40,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 5 letters. Loop has 3 letters. [2022-07-22 01:25:40,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:40,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 29 transitions. Stem has 2 letters. Loop has 6 letters. [2022-07-22 01:25:40,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:40,642 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 49 transitions. [2022-07-22 01:25:40,644 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-22 01:25:40,649 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 19 transitions. [2022-07-22 01:25:40,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2022-07-22 01:25:40,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2022-07-22 01:25:40,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 19 transitions. [2022-07-22 01:25:40,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:25:40,650 INFO L369 hiAutomatonCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-07-22 01:25:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 19 transitions. [2022-07-22 01:25:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-07-22 01:25:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-07-22 01:25:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-07-22 01:25:40,674 INFO L392 hiAutomatonCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-07-22 01:25:40,675 INFO L374 stractBuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-07-22 01:25:40,675 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 01:25:40,675 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 18 transitions. [2022-07-22 01:25:40,676 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-22 01:25:40,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:25:40,677 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:25:40,677 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 01:25:40,677 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 01:25:40,678 INFO L752 eck$LassoCheckResult]: Stem: 94#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 95#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 98#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 88#L21-2 [2022-07-22 01:25:40,678 INFO L754 eck$LassoCheckResult]: Loop: 88#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 96#L21-2 assume !(main_~j~0#1 <= main_~i~0#1); 91#L21-3 main_~i~0#1 := 1 + main_~i~0#1; 87#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 88#L21-2 [2022-07-22 01:25:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2022-07-22 01:25:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:40,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276380858] [2022-07-22 01:25:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,688 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1537394, now seen corresponding path program 1 times [2022-07-22 01:25:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206612800] [2022-07-22 01:25:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,708 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:40,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1810841241, now seen corresponding path program 1 times [2022-07-22 01:25:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:40,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701842914] [2022-07-22 01:25:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:40,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,742 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:40,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:40,799 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:40,799 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:40,800 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:40,800 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:40,801 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:25:40,802 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,802 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:40,803 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:40,803 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2022-07-22 01:25:40,803 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:40,803 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:40,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:40,886 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:40,887 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:25:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,888 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) [2022-07-22 01:25:40,898 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:40,898 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:40,905 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 [2022-07-22 01:25:40,919 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 [2022-07-22 01:25:40,932 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:25:40,933 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:25:40,959 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 [2022-07-22 01:25:40,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:40,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:40,961 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) [2022-07-22 01:25:40,962 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 [2022-07-22 01:25:40,963 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:40,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:40,988 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:25:40,988 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:25:41,013 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 [2022-07-22 01:25:41,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,015 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) [2022-07-22 01:25:41,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:41,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:41,032 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 [2022-07-22 01:25:41,073 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 [2022-07-22 01:25:41,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,074 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) [2022-07-22 01:25:41,076 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 [2022-07-22 01:25:41,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:25:41,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:41,225 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:25:41,232 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 [2022-07-22 01:25:41,232 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:41,232 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:41,232 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:41,232 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:41,233 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:25:41,233 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,233 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:41,233 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:41,233 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2022-07-22 01:25:41,233 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:41,233 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:41,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,301 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:41,301 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:25:41,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:41,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-07-22 01:25:41,306 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 [2022-07-22 01:25:41,314 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:41,314 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:41,314 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:41,314 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:41,320 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:25:41,321 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:25:41,339 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:25:41,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,365 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) [2022-07-22 01:25:41,372 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 [2022-07-22 01:25:41,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:41,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:41,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:41,380 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:41,386 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:25:41,386 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:25:41,391 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 [2022-07-22 01:25:41,410 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:25:41,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2022-07-22 01:25:41,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,427 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) [2022-07-22 01:25:41,428 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 [2022-07-22 01:25:41,429 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 [2022-07-22 01:25:41,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:41,437 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:25:41,437 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:41,437 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:41,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:41,439 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:25:41,439 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:25:41,453 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:25:41,456 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:25:41,457 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:25:41,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,460 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) [2022-07-22 01:25:41,468 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:25:41,468 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:25:41,469 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:25:41,469 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~n~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~n~0#1 Supporting invariants [] [2022-07-22 01:25:41,491 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 [2022-07-22 01:25:41,496 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 [2022-07-22 01:25:41,497 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:25:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:25:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 01:25:41,550 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 [2022-07-22 01:25:41,550 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 7 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) [2022-07-22 01:25:41,574 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 7. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 23 states and 32 transitions. Complement of second has 6 states. [2022-07-22 01:25:41,575 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 [2022-07-22 01:25:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-07-22 01:25:41,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-22 01:25:41,580 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:41,580 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-22 01:25:41,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:41,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-22 01:25:41,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:41,581 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2022-07-22 01:25:41,582 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-22 01:25:41,583 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 16 states and 23 transitions. [2022-07-22 01:25:41,583 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2022-07-22 01:25:41,583 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2022-07-22 01:25:41,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 23 transitions. [2022-07-22 01:25:41,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:25:41,583 INFO L369 hiAutomatonCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-07-22 01:25:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 23 transitions. [2022-07-22 01:25:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-07-22 01:25:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-07-22 01:25:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2022-07-22 01:25:41,585 INFO L392 hiAutomatonCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-07-22 01:25:41,585 INFO L374 stractBuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-07-22 01:25:41,585 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 01:25:41,585 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 22 transitions. [2022-07-22 01:25:41,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-22 01:25:41,586 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:25:41,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:25:41,586 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-22 01:25:41,586 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 01:25:41,586 INFO L752 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 173#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 167#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 168#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 174#L21-2 [2022-07-22 01:25:41,587 INFO L754 eck$LassoCheckResult]: Loop: 174#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 174#L21-2 [2022-07-22 01:25:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 925804, now seen corresponding path program 1 times [2022-07-22 01:25:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087507705] [2022-07-22 01:25:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,591 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 1 times [2022-07-22 01:25:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:41,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171233197] [2022-07-22 01:25:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,597 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 28699944, now seen corresponding path program 2 times [2022-07-22 01:25:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549076801] [2022-07-22 01:25:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,608 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:41,612 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:41,622 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:41,623 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:41,623 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:41,623 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:41,623 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:25:41,623 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,623 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:41,624 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:41,624 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2022-07-22 01:25:41,624 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:41,624 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:41,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,662 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:41,662 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:25:41,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,664 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) [2022-07-22 01:25:41,665 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 [2022-07-22 01:25:41,667 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:41,667 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:41,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:25:41,692 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:25:41,717 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 [2022-07-22 01:25:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:41,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:41,726 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:41,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-22 01:25:41,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:41,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,771 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:41,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-22 01:25:41,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:25:41,773 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:41,905 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:25:41,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:41,908 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:41,908 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:41,908 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:41,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:41,909 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:25:41,909 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,909 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:41,909 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:41,909 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2022-07-22 01:25:41,909 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:41,909 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:41,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:41,957 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:41,966 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:25:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:41,986 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:41,986 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 [2022-07-22 01:25:41,989 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 [2022-07-22 01:25:41,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-22 01:25:41,998 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:41,998 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:41,998 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:41,998 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:42,000 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2022-07-22 01:25:42,000 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2022-07-22 01:25:42,010 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:25:42,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,042 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 [2022-07-22 01:25:42,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:42,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:25:42,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:42,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:42,051 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:42,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:25:42,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:25:42,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-22 01:25:42,063 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:25:42,085 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:25:42,085 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:25:42,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,086 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,090 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:25:42,090 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:25:42,091 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:25:42,091 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~j~0#1) = 2*ULTIMATE.start_main_~i~0#1 - 2*ULTIMATE.start_main_~j~0#1 + 1 Supporting invariants [] [2022-07-22 01:25:42,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-07-22 01:25:42,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,110 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:25:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:25:42,141 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-07-22 01:25:42,141 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 22 transitions. cyclomatic complexity: 10 Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,157 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 22 transitions. cyclomatic complexity: 10. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 27 states and 39 transitions. Complement of second has 5 states. [2022-07-22 01:25:42,157 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 [2022-07-22 01:25:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-22 01:25:42,159 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2022-07-22 01:25:42,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 1 letters. [2022-07-22 01:25:42,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2022-07-22 01:25:42,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,160 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 39 transitions. [2022-07-22 01:25:42,166 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-22 01:25:42,172 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 34 transitions. [2022-07-22 01:25:42,172 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2022-07-22 01:25:42,172 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2022-07-22 01:25:42,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 34 transitions. [2022-07-22 01:25:42,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:25:42,173 INFO L369 hiAutomatonCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-07-22 01:25:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 34 transitions. [2022-07-22 01:25:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-07-22 01:25:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 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) [2022-07-22 01:25:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2022-07-22 01:25:42,177 INFO L392 hiAutomatonCegarLoop]: Abstraction has 19 states and 28 transitions. [2022-07-22 01:25:42,177 INFO L374 stractBuchiCegarLoop]: Abstraction has 19 states and 28 transitions. [2022-07-22 01:25:42,178 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 01:25:42,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 28 transitions. [2022-07-22 01:25:42,179 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-07-22 01:25:42,179 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:25:42,179 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:25:42,181 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2022-07-22 01:25:42,181 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 01:25:42,182 INFO L752 eck$LassoCheckResult]: Stem: 250#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 251#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~i~0#1, main_~j~0#1, main_~n~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~n~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 244#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 245#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 252#L21-2 assume !(main_~j~0#1 <= main_~i~0#1); 261#L21-3 main_~i~0#1 := 1 + main_~i~0#1; 259#L19-2 assume !!(main_~i~0#1 < main_~n~0#1);main_~j~0#1 := 0; 255#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 254#L21-2 [2022-07-22 01:25:42,182 INFO L754 eck$LassoCheckResult]: Loop: 254#L21-2 assume !!(main_~j~0#1 <= main_~i~0#1);main_~j~0#1 := 1 + main_~j~0#1; 254#L21-2 [2022-07-22 01:25:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash 301503643, now seen corresponding path program 2 times [2022-07-22 01:25:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488935065] [2022-07-22 01:25:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,196 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash 51, now seen corresponding path program 2 times [2022-07-22 01:25:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:42,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78086982] [2022-07-22 01:25:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,204 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash 756678361, now seen corresponding path program 3 times [2022-07-22 01:25:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:25:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810826123] [2022-07-22 01:25:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:25:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:25:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:25:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:25:42,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:25:42,228 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:42,228 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:42,228 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:42,228 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:42,228 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:25:42,228 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,228 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:42,229 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:42,229 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2022-07-22 01:25:42,229 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:42,229 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:42,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,260 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:42,261 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:25:42,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,262 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:25:42,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:42,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-07-22 01:25:42,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,324 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-22 01:25:42,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:25:42,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:25:42,453 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:25:42,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2022-07-22 01:25:42,456 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:25:42,457 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:25:42,457 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:25:42,457 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:25:42,457 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:25:42,457 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,457 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:25:42,457 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:25:42,457 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2022-07-22 01:25:42,457 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:25:42,457 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:25:42,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:25:42,496 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:25:42,496 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:25:42,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,503 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 [2022-07-22 01:25:42,511 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:25:42,511 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:25:42,511 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:25:42,511 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:25:42,511 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:25:42,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:25:42,512 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:25:42,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-22 01:25:42,522 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:25:42,528 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:25:42,528 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:25:42,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:25:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:25:42,530 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:25:42,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-22 01:25:42,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:25:42,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:25:42,532 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:25:42,532 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1, ULTIMATE.start_main_~i~0#1) = -2*ULTIMATE.start_main_~j~0#1 + 2*ULTIMATE.start_main_~i~0#1 + 1 Supporting invariants [] [2022-07-22 01:25:42,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,558 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:25:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:25:42,595 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-07-22 01:25:42,595 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,608 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 36 transitions. Complement of second has 5 states. [2022-07-22 01:25:42,609 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 [2022-07-22 01:25:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-22 01:25:42,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-22 01:25:42,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,611 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:25:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:25:42,643 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2022-07-22 01:25:42,644 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,656 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 36 transitions. Complement of second has 5 states. [2022-07-22 01:25:42,656 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 [2022-07-22 01:25:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2022-07-22 01:25:42,664 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-22 01:25:42,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,664 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:25:42,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-07-22 01:25:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:25:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:25:42,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:25:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:25:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:25:42,727 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-07-22 01:25:42,727 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,734 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 28 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 22 states and 31 transitions. Complement of second has 4 states. [2022-07-22 01:25:42,735 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 [2022-07-22 01:25:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:25:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2022-07-22 01:25:42,736 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 1 letters. [2022-07-22 01:25:42,736 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,736 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 9 letters. Loop has 1 letters. [2022-07-22 01:25:42,736 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,736 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2022-07-22 01:25:42,737 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:25:42,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2022-07-22 01:25:42,737 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:25:42,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-22 01:25:42,738 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-22 01:25:42,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 01:25:42,738 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-22 01:25:42,738 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-22 01:25:42,738 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:25:42,739 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-22 01:25:42,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 01:25:42 BoogieIcfgContainer [2022-07-22 01:25:42,745 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 01:25:42,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 01:25:42,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 01:25:42,745 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 01:25:42,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:25:39" (3/4) ... [2022-07-22 01:25:42,748 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 01:25:42,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 01:25:42,749 INFO L158 Benchmark]: Toolchain (without parser) took 3810.94ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 34.9MB in the beginning and 58.7MB in the end (delta: -23.8MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2022-07-22 01:25:42,749 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:25:42,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.64ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 26.0MB in the end (delta: 8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 01:25:42,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.70ms. Allocated memory is still 56.6MB. Free memory was 26.0MB in the beginning and 40.3MB in the end (delta: -14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 01:25:42,750 INFO L158 Benchmark]: Boogie Preprocessor took 14.50ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 39.5MB in the end (delta: 845.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:25:42,751 INFO L158 Benchmark]: RCFGBuilder took 219.84ms. Allocated memory is still 56.6MB. Free memory was 39.5MB in the beginning and 31.7MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 01:25:42,751 INFO L158 Benchmark]: BuchiAutomizer took 3340.96ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 31.5MB in the beginning and 59.3MB in the end (delta: -27.8MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2022-07-22 01:25:42,751 INFO L158 Benchmark]: Witness Printer took 2.99ms. Allocated memory is still 83.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:25:42,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.64ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 26.0MB in the end (delta: 8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.70ms. Allocated memory is still 56.6MB. Free memory was 26.0MB in the beginning and 40.3MB in the end (delta: -14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.50ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 39.5MB in the end (delta: 845.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 219.84ms. Allocated memory is still 56.6MB. Free memory was 39.5MB in the beginning and 31.7MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 3340.96ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 31.5MB in the beginning and 59.3MB in the end (delta: -27.8MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. * Witness Printer took 2.99ms. Allocated memory is still 83.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (0 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -1 * i and consists of 6 locations. One deterministic module has affine ranking function -1 * i + n and consists of 4 locations. One deterministic module has affine ranking function -2 * j + 2 * i + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * j + 2 * i + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.2s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 32 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax191 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq156 hnf93 smp100 dnf100 smp100 tf110 neg98 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 36ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-22 01:25:42,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE