./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.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 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:41:19,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:41:19,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:41:19,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:41:19,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:41:19,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:41:19,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:41:19,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:41:19,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:41:19,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:41:19,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:41:19,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:41:19,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:41:19,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:41:19,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:41:19,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:41:19,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:41:19,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:41:19,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:41:19,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:41:19,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:41:19,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:41:19,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:41:19,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:41:19,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:41:19,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:41:19,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:41:19,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:41:19,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:41:19,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:41:19,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:41:19,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:41:19,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:41:19,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:41:19,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:41:19,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:41:19,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:41:19,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:41:19,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:41:19,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:41:19,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:41:19,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:41:19,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:41:19,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:41:19,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:41:19,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:41:19,763 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:41:19,763 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:41:19,764 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:41:19,764 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:41:19,764 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:41:19,765 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:41:19,765 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:41:19,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:41:19,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:41:19,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:41:19,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:41:19,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:41:19,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:41:19,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:41:19,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:41:19,768 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:41:19,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:41:19,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:41:19,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:41:19,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:41:19,769 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:41:19,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:41:19,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:41:19,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:41:19,770 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:41:19,771 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:41:19,772 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 -> 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 [2020-10-19 18:41:20,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:41:20,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:41:20,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:41:20,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:41:20,125 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:41:20,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-10-19 18:41:20,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e276bb4ed/61fd906373094097b821e62ff10913a3/FLAG2bd010c88 [2020-10-19 18:41:20,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:41:20,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-10-19 18:41:20,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e276bb4ed/61fd906373094097b821e62ff10913a3/FLAG2bd010c88 [2020-10-19 18:41:20,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e276bb4ed/61fd906373094097b821e62ff10913a3 [2020-10-19 18:41:21,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:41:21,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:41:21,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:21,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:41:21,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:41:21,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ec8743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21, skipping insertion in model container [2020-10-19 18:41:21,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:41:21,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:41:21,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:21,240 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:41:21,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:21,276 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:41:21,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21 WrapperNode [2020-10-19 18:41:21,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:21,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:21,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:41:21,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:41:21,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:21,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:41:21,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:41:21,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:41:21,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (1/1) ... [2020-10-19 18:41:21,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:41:21,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:41:21,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:41:21,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:41:21,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (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 [2020-10-19 18:41:21,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:41:21,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:41:21,641 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:41:21,642 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-19 18:41:21,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:21 BoogieIcfgContainer [2020-10-19 18:41:21,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:41:21,644 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:41:21,644 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:41:21,648 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:41:21,649 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:21,650 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:41:21" (1/3) ... [2020-10-19 18:41:21,651 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b0304f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:21, skipping insertion in model container [2020-10-19 18:41:21,651 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:21,651 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:21" (2/3) ... [2020-10-19 18:41:21,652 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b0304f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:21, skipping insertion in model container [2020-10-19 18:41:21,652 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:21,652 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:21" (3/3) ... [2020-10-19 18:41:21,654 INFO L373 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-10-19 18:41:21,705 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:41:21,706 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:41:21,706 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:41:21,706 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:41:21,706 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:41:21,707 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:41:21,707 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:41:21,707 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:41:21,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-19 18:41:21,743 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:21,743 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:21,743 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:21,749 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:21,749 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:41:21,749 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:41:21,749 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-19 18:41:21,750 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:21,750 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:21,751 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:21,751 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:41:21,751 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:41:21,757 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L18-2true [2020-10-19 18:41:21,758 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(main_~x~0 != main_~K~0); 7#L18true assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 5#L18-2true [2020-10-19 18:41:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:41:21,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:21,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304298425] [2020-10-19 18:41:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,865 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,882 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-10-19 18:41:21,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:21,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334355548] [2020-10-19 18:41:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:21,903 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-10-19 18:41:21,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:21,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066381443] [2020-10-19 18:41:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:21,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:21,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:21,986 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:21,988 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:21,988 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:21,988 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:21,989 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:21,989 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:21,989 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:21,989 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:21,990 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2020-10-19 18:41:21,990 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:21,990 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:22,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,128 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:22,129 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 [2020-10-19 18:41:22,136 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:22,136 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:22,146 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:22,146 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-19 18:41:22,189 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:22,189 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 [2020-10-19 18:41:22,197 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:22,198 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-19 18:41:22,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:22,232 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:22,261 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:22,262 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:22,476 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:22,478 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:22,478 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:22,478 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:22,478 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:22,478 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:22,479 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:22,479 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:22,479 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:22,479 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2020-10-19 18:41:22,479 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:22,479 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:22,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:22,597 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:22,603 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2020-10-19 18:41:22,616 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 [2020-10-19 18:41:22,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:22,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:22,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:22,620 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:22,620 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:22,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:22,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:41:22,628 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:22,640 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-19 18:41:22,640 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 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:22,645 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:22,645 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:22,646 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:22,647 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] [2020-10-19 18:41:22,672 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:22,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:22,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:22,747 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 [2020-10-19 18:41:22,749 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-10-19 18:41:22,809 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2020-10-19 18:41:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 18:41:22,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2020-10-19 18:41:22,816 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:22,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-19 18:41:22,816 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:22,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-19 18:41:22,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:22,818 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2020-10-19 18:41:22,821 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:22,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-10-19 18:41:22,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-19 18:41:22,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-19 18:41:22,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-10-19 18:41:22,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:22,828 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:41:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-10-19 18:41:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-19 18:41:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:41:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-19 18:41:22,860 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:41:22,860 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:41:22,860 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:41:22,860 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-19 18:41:22,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:22,861 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:22,861 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:22,862 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:41:22,862 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:41:22,862 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 69#L18-2 assume !!(main_~x~0 != main_~K~0); 67#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 63#L18-2 [2020-10-19 18:41:22,863 INFO L796 eck$LassoCheckResult]: Loop: 63#L18-2 assume !!(main_~x~0 != main_~K~0); 64#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 63#L18-2 [2020-10-19 18:41:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:22,863 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-10-19 18:41:22,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225075130] [2020-10-19 18:41:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:22,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:22,874 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:22,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2020-10-19 18:41:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:22,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677209255] [2020-10-19 18:41:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:22,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:22,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:22,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2020-10-19 18:41:22,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:22,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279293867] [2020-10-19 18:41:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:23,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279293867] [2020-10-19 18:41:23,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179389146] [2020-10-19 18:41:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:41:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:23,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:41:23,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-10-19 18:41:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582932644] [2020-10-19 18:41:23,106 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:23,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:23,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:23,107 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:23,107 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:23,107 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,107 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:23,107 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:23,107 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2020-10-19 18:41:23,107 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:23,108 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:23,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,172 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:23,172 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2020-10-19 18:41:23,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:23,178 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:23,182 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:23,182 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: [] 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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,218 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:23,218 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:23,221 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:23,221 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: [] 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,247 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:23,247 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,283 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:23,283 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:23,480 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:23,482 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:23,482 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:23,483 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:23,483 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:23,483 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:23,483 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,483 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:23,483 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:23,483 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2020-10-19 18:41:23,484 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:23,484 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:23,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:23,577 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:23,578 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:23,593 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 [2020-10-19 18:41:23,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:23,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:23,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:23,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:23,600 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:23,601 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,608 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,650 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 [2020-10-19 18:41:23,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:23,653 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:23,653 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:23,653 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:23,656 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:41:23,657 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:41:23,662 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:23,722 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 [2020-10-19 18:41:23,724 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:23,724 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:23,725 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:23,725 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:23,725 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:23,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:23,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,735 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:23,754 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-19 18:41:23,754 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:23,770 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:23,770 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:23,771 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:23,771 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:23,810 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:23,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:23,845 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 [2020-10-19 18:41:23,845 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-19 18:41:23,868 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2020-10-19 18:41:23,869 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 [2020-10-19 18:41:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-10-19 18:41:23,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-19 18:41:23,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:23,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2020-10-19 18:41:23,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:23,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 18:41:23,872 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:23,872 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2020-10-19 18:41:23,873 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:23,874 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2020-10-19 18:41:23,874 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-10-19 18:41:23,874 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 18:41:23,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2020-10-19 18:41:23,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:23,875 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-19 18:41:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2020-10-19 18:41:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-19 18:41:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-19 18:41:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-10-19 18:41:23,878 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-19 18:41:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:41:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:41:23,883 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2020-10-19 18:41:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:23,941 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-10-19 18:41:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:41:23,941 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-10-19 18:41:23,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:23,943 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2020-10-19 18:41:23,943 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 18:41:23,943 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 18:41:23,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2020-10-19 18:41:23,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:23,948 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-10-19 18:41:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2020-10-19 18:41:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-10-19 18:41:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:41:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-10-19 18:41:23,950 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-10-19 18:41:23,951 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-10-19 18:41:23,951 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:41:23,951 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-10-19 18:41:23,951 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:23,952 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:23,952 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:23,953 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:41:23,953 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:41:23,953 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 158#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2020-10-19 18:41:23,953 INFO L796 eck$LassoCheckResult]: Loop: 154#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 153#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2020-10-19 18:41:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:41:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973923520] [2020-10-19 18:41:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:23,963 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:23,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:23,969 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-10-19 18:41:23,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:23,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154640253] [2020-10-19 18:41:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:23,985 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:23,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:23,991 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:23,992 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2020-10-19 18:41:23,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:23,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828730950] [2020-10-19 18:41:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:24,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:24,014 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:24,015 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:24,043 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:24,043 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:24,044 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:24,044 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:24,044 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:24,044 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:24,044 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:24,044 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:24,044 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2020-10-19 18:41:24,044 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:24,045 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:24,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:24,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:24,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:24,149 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:24,149 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:24,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:24,154 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:24,158 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:24,159 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:24,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:24,190 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 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 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:24,219 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:24,219 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:25,966 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:25,969 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:25,969 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:25,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:25,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:25,969 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:25,969 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:25,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:25,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:25,970 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2020-10-19 18:41:25,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:25,970 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:25,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:25,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:25,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:26,055 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:26,055 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:26,068 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 [2020-10-19 18:41:26,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:26,070 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:26,070 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:26,070 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:41:26,070 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:26,072 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-19 18:41:26,072 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:26,078 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:26,084 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:26,084 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:26,095 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:26,095 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:26,095 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:26,096 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~K~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~K~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:26,126 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:26,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:26,176 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 [2020-10-19 18:41:26,176 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 18:41:26,186 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2020-10-19 18:41:26,187 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 [2020-10-19 18:41:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-19 18:41:26,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-19 18:41:26,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:26,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:41:26,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:26,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-19 18:41:26,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:26,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-10-19 18:41:26,190 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:26,190 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2020-10-19 18:41:26,190 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-19 18:41:26,190 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-10-19 18:41:26,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-10-19 18:41:26,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:41:26,191 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-19 18:41:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-10-19 18:41:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-10-19 18:41:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:41:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-10-19 18:41:26,192 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-19 18:41:26,193 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-19 18:41:26,193 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:41:26,193 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-10-19 18:41:26,193 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:41:26,193 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:26,193 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:26,194 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-10-19 18:41:26,194 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:41:26,194 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 203#L18-2 assume !!(main_~x~0 != main_~K~0); 204#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 205#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2020-10-19 18:41:26,194 INFO L796 eck$LassoCheckResult]: Loop: 206#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 208#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2020-10-19 18:41:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-10-19 18:41:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:26,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698955419] [2020-10-19 18:41:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:26,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:26,203 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:26,204 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-10-19 18:41:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:26,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975788839] [2020-10-19 18:41:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:26,209 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:26,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:26,212 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2020-10-19 18:41:26,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:26,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263730125] [2020-10-19 18:41:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263730125] [2020-10-19 18:41:26,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:41:26,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:41:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167252563] [2020-10-19 18:41:26,272 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:26,272 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:26,272 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:26,273 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:26,273 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:26,273 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:26,273 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:26,273 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:26,273 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2020-10-19 18:41:26,273 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:26,274 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:26,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:26,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:26,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:26,357 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:26,357 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:26,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:26,368 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:26,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:26,422 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:28,778 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:28,781 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:28,781 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:28,781 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:28,781 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:28,781 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:28,781 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:28,782 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:28,782 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:28,782 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2020-10-19 18:41:28,782 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:28,782 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:28,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:28,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:28,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:28,884 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:28,884 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:28,924 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 [2020-10-19 18:41:28,926 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:28,927 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:28,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:28,927 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:41:28,927 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:28,929 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-19 18:41:28,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:28,933 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:28,940 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:28,940 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:28,948 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:28,949 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:28,949 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:28,949 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = -2*ULTIMATE.start_main_~x~0 + 2*ULTIMATE.start_main_~K~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:28,984 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:29,046 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 [2020-10-19 18:41:29,046 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-19 18:41:29,050 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-10-19 18:41:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-10-19 18:41:29,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:41:29,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:29,052 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:29,095 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 18:41:29,095 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-19 18:41:29,103 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-10-19 18:41:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-10-19 18:41:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-10-19 18:41:29,104 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:41:29,104 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:29,104 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:41:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:29,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:41:29,155 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 18:41:29,155 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-19 18:41:29,166 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2020-10-19 18:41:29,166 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 [2020-10-19 18:41:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:41:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-10-19 18:41:29,167 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:41:29,168 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:29,168 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-19 18:41:29,168 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:29,168 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2020-10-19 18:41:29,169 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:41:29,169 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-10-19 18:41:29,169 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:29,169 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2020-10-19 18:41:29,170 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:41:29,170 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:41:29,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:41:29,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:29,171 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:29,171 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:29,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:41:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:41:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:41:29,172 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2020-10-19 18:41:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:41:29,172 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-19 18:41:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 18:41:29,172 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-19 18:41:29,173 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:29,173 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:41:29,173 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:41:29,173 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:41:29,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:41:29,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:41:29,174 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:29,174 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:29,174 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:41:29,174 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:41:29,174 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:41:29,175 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:41:29,175 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:41:29,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:41:29 BoogieIcfgContainer [2020-10-19 18:41:29,182 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:41:29,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:41:29,183 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:41:29,183 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:41:29,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:21" (3/4) ... [2020-10-19 18:41:29,187 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:41:29,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:41:29,190 INFO L168 Benchmark]: Toolchain (without parser) took 8184.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 960.0 MB in the beginning and 1.1 GB in the end (delta: -146.9 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,191 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:29,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.93 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.9 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -130.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,194 INFO L168 Benchmark]: Boogie Preprocessor took 24.01 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:41:29,194 INFO L168 Benchmark]: RCFGBuilder took 246.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,195 INFO L168 Benchmark]: BuchiAutomizer took 7537.82 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -55.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,196 INFO L168 Benchmark]: Witness Printer took 5.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:41:29,200 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 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 265.93 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 95.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.9 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -130.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.01 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 246.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 7537.82 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -55.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * K and consists of 4 locations. One deterministic module has affine ranking function x + -1 * K and consists of 3 locations. One deterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 2 * K + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 6.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...