./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/twisted.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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-numeric/twisted.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 56facc094037ea8aa088ee9a4faafddcfe652feb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:35:08,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:35:08,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:35:08,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:35:08,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:35:08,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:35:08,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:35:08,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:35:08,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:35:08,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:35:08,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:35:08,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:35:08,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:35:08,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:35:08,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:35:08,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:35:08,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:35:08,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:35:08,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:35:08,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:35:08,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:35:08,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:35:08,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:35:08,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:35:08,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:35:08,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:35:08,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:35:08,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:35:08,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:35:08,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:35:08,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:35:08,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:35:08,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:35:08,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:35:08,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:35:08,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:35:08,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:35:08,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:35:08,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:35:08,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:35:08,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:35:08,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:35:08,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:35:08,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:35:08,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:35:08,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:35:08,722 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:35:08,723 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:35:08,723 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:35:08,723 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:35:08,723 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:35:08,723 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:35:08,725 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:35:08,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:35:08,725 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:35:08,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:35:08,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:35:08,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:35:08,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:35:08,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:35:08,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:35:08,728 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:35:08,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:35:08,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:35:08,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:35:08,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:35:08,730 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:35:08,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:35:08,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:35:08,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:35:08,731 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:35:08,732 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:35:08,733 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> 56facc094037ea8aa088ee9a4faafddcfe652feb [2020-10-20 06:35:08,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:35:08,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:35:08,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:35:08,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:35:08,976 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:35:08,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/twisted.c [2020-10-20 06:35:09,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e798577/805911847e0040d29da97dff91d6b60f/FLAGf57707a3e [2020-10-20 06:35:09,580 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:35:09,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/twisted.c [2020-10-20 06:35:09,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e798577/805911847e0040d29da97dff91d6b60f/FLAGf57707a3e [2020-10-20 06:35:09,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e798577/805911847e0040d29da97dff91d6b60f [2020-10-20 06:35:09,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:35:09,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:35:09,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:09,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:35:09,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:35:09,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:09" (1/1) ... [2020-10-20 06:35:09,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31235a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:09, skipping insertion in model container [2020-10-20 06:35:09,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:09" (1/1) ... [2020-10-20 06:35:09,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:35:10,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:35:10,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:10,177 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:35:10,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:10,205 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:35:10,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10 WrapperNode [2020-10-20 06:35:10,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:10,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:10,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:35:10,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:35:10,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:10,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:35:10,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:35:10,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:35:10,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:35:10,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:35:10,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:35:10,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:35:10,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:35:10,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:35:10,553 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:35:10,553 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 06:35:10,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:10 BoogieIcfgContainer [2020-10-20 06:35:10,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:35:10,558 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:35:10,558 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:35:10,564 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:35:10,565 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:10,566 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:35:09" (1/3) ... [2020-10-20 06:35:10,567 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@777a62d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:10, skipping insertion in model container [2020-10-20 06:35:10,568 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:10,568 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10" (2/3) ... [2020-10-20 06:35:10,581 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@777a62d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:10, skipping insertion in model container [2020-10-20 06:35:10,581 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:10,581 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:10" (3/3) ... [2020-10-20 06:35:10,584 INFO L373 chiAutomizerObserver]: Analyzing ICFG twisted.c [2020-10-20 06:35:10,657 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:35:10,657 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:35:10,657 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:35:10,657 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:35:10,658 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:35:10,658 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:35:10,658 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:35:10,658 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:35:10,676 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-20 06:35:10,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:10,697 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:10,697 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:10,702 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:35:10,702 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 06:35:10,703 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:35:10,703 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-20 06:35:10,704 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:10,704 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:10,704 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:10,705 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:35:10,705 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 06:35:10,712 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 8#L18true [2020-10-20 06:35:10,713 INFO L796 eck$LassoCheckResult]: Loop: 8#L18true assume !true; 9#L13true goto; 5#L16true assume !!(f_~j~0 < f_~l);f_#t~post1 := f_~j~0;f_~j~0 := 1 + f_#t~post1;havoc f_#t~post1; 3#L15true assume !(0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2)); 8#L18true [2020-10-20 06:35:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-20 06:35:10,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:10,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477066873] [2020-10-20 06:35:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,810 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,831 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1450986, now seen corresponding path program 1 times [2020-10-20 06:35:10,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:10,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234704472] [2020-10-20 06:35:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:10,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234704472] [2020-10-20 06:35:10,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:35:10,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-20 06:35:10,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257943597] [2020-10-20 06:35:10,866 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:35:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:35:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 06:35:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 06:35:10,889 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 06:35:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:35:10,897 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2020-10-20 06:35:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 06:35:10,899 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2020-10-20 06:35:10,900 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:10,904 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 7 states and 10 transitions. [2020-10-20 06:35:10,906 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-20 06:35:10,906 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-20 06:35:10,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-10-20 06:35:10,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:35:10,907 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:35:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-10-20 06:35:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 06:35:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 06:35:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-20 06:35:10,930 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:35:10,930 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:35:10,931 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:35:10,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-20 06:35:10,931 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:10,931 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:10,932 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:10,932 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:35:10,932 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:10,932 INFO L794 eck$LassoCheckResult]: Stem: 35#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 34#L18 [2020-10-20 06:35:10,932 INFO L796 eck$LassoCheckResult]: Loop: 34#L18 goto; 36#L9 assume !(f_~i~0 < f_~k); 37#L13 goto; 33#L16 assume !!(f_~j~0 < f_~l);f_#t~post1 := f_~j~0;f_~j~0 := 1 + f_#t~post1;havoc f_#t~post1; 32#L15 assume !(0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2)); 34#L18 [2020-10-20 06:35:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-20 06:35:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556335631] [2020-10-20 06:35:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash 33506102, now seen corresponding path program 1 times [2020-10-20 06:35:10,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:10,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789973700] [2020-10-20 06:35:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:10,983 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:10,983 INFO L82 PathProgramCache]: Analyzing trace with hash 921009783, now seen corresponding path program 1 times [2020-10-20 06:35:10,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:10,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891733984] [2020-10-20 06:35:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:10,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,007 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:11,097 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:11,098 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:11,098 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:11,098 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:11,098 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:11,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:11,099 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:11,099 INFO L133 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration2_Loop [2020-10-20 06:35:11,099 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:11,099 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:11,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,249 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:11,251 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,256 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:11,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:11,265 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:11,265 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_f_#t~post1=0} Honda state: {ULTIMATE.start_f_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:11,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:11,316 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:11,346 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:11,524 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:11,527 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:11,528 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:11,528 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:11,528 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:11,528 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:11,528 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,528 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:11,529 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:11,529 INFO L133 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration2_Loop [2020-10-20 06:35:11,529 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:11,529 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:11,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:11,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:11,649 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:11,666 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:11,669 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:11,669 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:11,670 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:11,670 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:11,670 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:11,675 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:11,676 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,681 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:11,693 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 06:35:11,693 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,710 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:11,710 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:11,711 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:11,712 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_f_~j~0, ULTIMATE.start_f_~l) = -1*ULTIMATE.start_f_~j~0 + 1*ULTIMATE.start_f_~l Supporting invariants [] [2020-10-20 06:35:11,751 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:11,869 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 [2020-10-20 06:35:11,870 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 4 Second operand 4 states. [2020-10-20 06:35:11,904 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 15 states and 22 transitions. Complement of second has 4 states. [2020-10-20 06:35:11,905 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 [2020-10-20 06:35:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2020-10-20 06:35:11,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 1 letters. Loop has 5 letters. [2020-10-20 06:35:11,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:11,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 5 letters. [2020-10-20 06:35:11,912 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:11,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 1 letters. Loop has 10 letters. [2020-10-20 06:35:11,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:11,934 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2020-10-20 06:35:11,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:35:11,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 12 states and 17 transitions. [2020-10-20 06:35:11,945 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-20 06:35:11,947 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-10-20 06:35:11,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2020-10-20 06:35:11,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:11,948 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2020-10-20 06:35:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2020-10-20 06:35:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-20 06:35:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 06:35:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-10-20 06:35:11,955 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-20 06:35:11,955 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-20 06:35:11,956 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:35:11,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 16 transitions. [2020-10-20 06:35:11,956 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:35:11,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:11,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:11,958 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:35:11,959 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:35:11,959 INFO L794 eck$LassoCheckResult]: Stem: 96#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 97#L18 goto; 98#L9 [2020-10-20 06:35:11,959 INFO L796 eck$LassoCheckResult]: Loop: 98#L9 assume !!(f_~i~0 < f_~k);f_#t~post0 := f_~i~0;f_~i~0 := 1 + f_#t~post0;havoc f_#t~post0; 101#L8 assume 0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2); 98#L9 [2020-10-20 06:35:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash 997, now seen corresponding path program 1 times [2020-10-20 06:35:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:11,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316082990] [2020-10-20 06:35:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,985 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-10-20 06:35:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:11,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233066876] [2020-10-20 06:35:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,995 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 958440, now seen corresponding path program 1 times [2020-10-20 06:35:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:12,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806438903] [2020-10-20 06:35:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,022 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:12,056 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:12,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:12,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:12,056 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:12,056 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:12,056 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:12,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:12,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration3_Loop [2020-10-20 06:35:12,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:12,057 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:12,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,132 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:12,132 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:12,136 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:12,136 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,141 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:12,152 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_f_#t~post0=0} Honda state: {ULTIMATE.start_f_#t~post0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,189 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:12,190 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,235 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:12,235 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:12,416 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:12,418 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:12,418 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:12,418 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:12,418 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:12,418 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:12,419 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,419 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:12,419 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:12,419 INFO L133 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration3_Loop [2020-10-20 06:35:12,419 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:12,419 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:12,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,507 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:12,507 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:12,515 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:12,517 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:12,518 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:12,518 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:12,518 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:12,518 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:12,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:12,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,524 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:12,549 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 06:35:12,549 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:12,564 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:12,564 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:12,564 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:12,564 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_f_~i~0, ULTIMATE.start_f_~k) = -1*ULTIMATE.start_f_~i~0 + 1*ULTIMATE.start_f_~k Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,602 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:12,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:12,727 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 [2020-10-20 06:35:12,727 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 16 transitions. cyclomatic complexity: 7 Second operand 3 states. [2020-10-20 06:35:12,755 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 16 transitions. cyclomatic complexity: 7. Second operand 3 states. Result 21 states and 31 transitions. Complement of second has 4 states. [2020-10-20 06:35:12,757 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 [2020-10-20 06:35:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:35:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2020-10-20 06:35:12,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-20 06:35:12,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-20 06:35:12,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-20 06:35:12,760 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 31 transitions. [2020-10-20 06:35:12,762 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:35:12,762 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2020-10-20 06:35:12,762 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:35:12,762 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:35:12,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:35:12,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:35:12,762 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:12,762 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:12,762 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:12,763 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:35:12,763 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:35:12,763 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:35:12,764 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 06:35:12,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:35:12 BoogieIcfgContainer [2020-10-20 06:35:12,771 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:35:12,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:35:12,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:35:12,772 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:35:12,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:10" (3/4) ... [2020-10-20 06:35:12,776 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:35:12,776 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:35:12,783 INFO L168 Benchmark]: Toolchain (without parser) took 2810.70 ms. Allocated memory was 41.4 MB in the beginning and 50.9 MB in the end (delta: 9.4 MB). Free memory was 19.6 MB in the beginning and 26.4 MB in the end (delta: -6.8 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,785 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 31.5 MB. Free memory was 7.5 MB in the beginning and 7.5 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.27 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 18.8 MB in the beginning and 21.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,794 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.58 ms. Allocated memory is still 41.9 MB. Free memory was 21.4 MB in the beginning and 19.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,795 INFO L168 Benchmark]: Boogie Preprocessor took 17.72 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 18.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,796 INFO L168 Benchmark]: RCFGBuilder took 300.06 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 18.7 MB in the beginning and 25.0 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,797 INFO L168 Benchmark]: BuchiAutomizer took 2213.02 ms. Allocated memory was 43.5 MB in the beginning and 50.9 MB in the end (delta: 7.3 MB). Free memory was 24.8 MB in the beginning and 26.9 MB in the end (delta: -2.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,799 INFO L168 Benchmark]: Witness Printer took 8.67 ms. Allocated memory is still 50.9 MB. Free memory was 26.9 MB in the beginning and 26.4 MB in the end (delta: 452.2 kB). Peak memory consumption was 452.2 kB. Max. memory is 14.3 GB. [2020-10-20 06:35:12,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 31.5 MB. Free memory was 7.5 MB in the beginning and 7.5 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 228.27 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 18.8 MB in the beginning and 21.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.58 ms. Allocated memory is still 41.9 MB. Free memory was 21.4 MB in the beginning and 19.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 17.72 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 18.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 300.06 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 18.7 MB in the beginning and 25.0 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 2213.02 ms. Allocated memory was 43.5 MB in the beginning and 50.9 MB in the end (delta: 7.3 MB). Free memory was 24.8 MB in the beginning and 26.9 MB in the end (delta: -2.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 14.3 GB. * Witness Printer took 8.67 ms. Allocated memory is still 50.9 MB. Free memory was 26.9 MB in the beginning and 26.4 MB in the end (delta: 452.2 kB). Peak memory consumption was 452.2 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * j + l and consists of 3 locations. One deterministic module has affine ranking function -1 * i + k and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 2 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.1s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 11 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 29 SDtfs, 17 SDslu, 11 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp77 ukn100 mio100 lsp100 div400 bol100 ite100 ukn100 eq145 hnf48 smp86 dnf100 smp100 tf106 neg98 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 61ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...