./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer --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 ff3652fa62b489d4e6a4a85c8349c06d13bd2232 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:09,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:09,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:09,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:09,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:09,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:09,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:09,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:09,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:09,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:09,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:09,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:09,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:09,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:09,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:09,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:09,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:09,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:09,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:09,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:09,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:09,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:09,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:09,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:09,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:09,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:09,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:09,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:09,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:09,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:09,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:09,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:09,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:09,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:09,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:09,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:09,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:09,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:09,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:09,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:09,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:09,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 02:58:09,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:09,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:09,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:09,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:09,740 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:09,740 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 02:58:09,740 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 02:58:09,741 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 02:58:09,741 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 02:58:09,741 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 02:58:09,742 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 02:58:09,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:09,743 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:58:09,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:09,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:09,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 02:58:09,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 02:58:09,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 02:58:09,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:09,744 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 02:58:09,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:09,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 02:58:09,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:09,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:09,745 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 02:58:09,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:09,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:09,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:09,746 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 02:58:09,749 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 02:58:09,749 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff3652fa62b489d4e6a4a85c8349c06d13bd2232 [2020-11-28 02:58:10,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:10,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:10,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:10,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:10,050 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:10,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2020-11-28 02:58:10,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/data/290cd5759/432ed65a9bdd4f6993a359b5df57c54a/FLAG02cef3956 [2020-11-28 02:58:10,527 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:10,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2020-11-28 02:58:10,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/data/290cd5759/432ed65a9bdd4f6993a359b5df57c54a/FLAG02cef3956 [2020-11-28 02:58:10,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/data/290cd5759/432ed65a9bdd4f6993a359b5df57c54a [2020-11-28 02:58:10,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:10,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:10,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:10,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:10,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:10,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50fb5a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10, skipping insertion in model container [2020-11-28 02:58:10,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:10,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:11,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:11,142 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:11,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:11,196 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:11,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11 WrapperNode [2020-11-28 02:58:11,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:11,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:11,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:11,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:11,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:11,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:11,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:11,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:11,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... [2020-11-28 02:58:11,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:11,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:11,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:11,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:11,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:11,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:11,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:11,481 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:11,481 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:58:11,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11 BoogieIcfgContainer [2020-11-28 02:58:11,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:11,485 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 02:58:11,485 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 02:58:11,489 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 02:58:11,490 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:11,490 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:58:10" (1/3) ... [2020-11-28 02:58:11,492 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@712cfa18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:11, skipping insertion in model container [2020-11-28 02:58:11,492 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:11,492 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:11" (2/3) ... [2020-11-28 02:58:11,493 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@712cfa18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:11, skipping insertion in model container [2020-11-28 02:58:11,493 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:11,493 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11" (3/3) ... [2020-11-28 02:58:11,495 INFO L373 chiAutomizerObserver]: Analyzing ICFG PodelskiRybalchenko-TACAS2011-Fig2.c [2020-11-28 02:58:11,565 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 02:58:11,565 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 02:58:11,566 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 02:58:11,566 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:11,566 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:11,566 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 02:58:11,566 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:11,566 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 02:58:11,579 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-28 02:58:11,598 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 02:58:11,598 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:11,598 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:11,604 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:11,604 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 02:58:11,604 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 02:58:11,605 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-28 02:58:11,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 02:58:11,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:11,607 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:11,607 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:11,607 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 02:58:11,614 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 3#L17-2true [2020-11-28 02:58:11,614 INFO L796 eck$LassoCheckResult]: Loop: 3#L17-2true assume !!(main_~x~0 >= 0);main_~y~0 := 1; 6#L19-2true assume !(main_~y~0 < main_~x~0); 5#L19-3true main_~x~0 := main_~x~0 - 1; 3#L17-2true [2020-11-28 02:58:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-28 02:58:11,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:11,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117491362] [2020-11-28 02:58:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,734 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-28 02:58:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:11,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555427076] [2020-11-28 02:58:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,762 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,774 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2020-11-28 02:58:11,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:11,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641124633] [2020-11-28 02:58:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:11,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:11,806 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:11,928 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:11,929 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:11,929 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:11,929 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:11,929 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:11,929 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:11,929 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:11,929 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:11,930 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2020-11-28 02:58:11,930 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:11,930 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:11,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:11,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:11,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,116 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:12,117 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:12,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:12,127 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:12,137 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:12,137 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 /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:12,165 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:12,165 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:12,169 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:12,169 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 /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:12,195 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:12,195 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:12,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:12,262 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:12,308 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:12,310 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:12,310 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:12,310 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:12,310 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:12,310 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:12,311 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:12,311 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:12,311 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:12,311 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2020-11-28 02:58:12,311 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:12,311 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:12,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,562 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:12,567 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:12,573 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 [2020-11-28 02:58:12,575 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:12,576 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:12,576 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:12,576 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:12,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:12,582 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:12,582 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:12,588 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:12,594 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 02:58:12,595 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:12,603 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:12,603 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:12,604 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:12,605 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2020-11-28 02:58:12,643 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:12,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:12,744 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 [2020-11-28 02:58:12,745 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2020-11-28 02:58:12,815 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 23 states and 35 transitions. Complement of second has 7 states. [2020-11-28 02:58:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 02:58:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-28 02:58:12,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-28 02:58:12,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:12,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-28 02:58:12,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:12,821 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-28 02:58:12,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:12,822 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 35 transitions. [2020-11-28 02:58:12,825 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:12,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-11-28 02:58:12,828 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-28 02:58:12,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-11-28 02:58:12,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-11-28 02:58:12,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 02:58:12,829 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-28 02:58:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-11-28 02:58:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-11-28 02:58:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 02:58:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2020-11-28 02:58:12,849 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2020-11-28 02:58:12,849 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2020-11-28 02:58:12,849 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 02:58:12,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 9 transitions. [2020-11-28 02:58:12,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:12,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:12,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:12,850 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:12,850 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-28 02:58:12,851 INFO L794 eck$LassoCheckResult]: Stem: 74#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 70#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 72#L19-2 [2020-11-28 02:58:12,851 INFO L796 eck$LassoCheckResult]: Loop: 72#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 72#L19-2 [2020-11-28 02:58:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-28 02:58:12,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108623089] [2020-11-28 02:58:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,861 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-28 02:58:12,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385498163] [2020-11-28 02:58:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,871 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-28 02:58:12,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264986870] [2020-11-28 02:58:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,879 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:12,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:12,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:12,909 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:12,909 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:12,909 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:12,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:12,909 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:12,910 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:12,910 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:12,910 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:12,910 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2020-11-28 02:58:12,910 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:12,910 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:12,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:12,980 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:12,980 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:12,989 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:12,989 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:12,995 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:12,995 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 /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:13,018 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:13,019 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/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 [2020-11-28 02:58:13,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:13,097 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:13,244 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:13,246 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:13,246 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:13,246 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:13,246 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:13,246 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:13,246 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,246 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:13,246 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:13,246 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2020-11-28 02:58:13,246 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:13,247 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:13,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,346 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:13,346 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:13,354 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 [2020-11-28 02:58:13,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:13,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:13,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:13,357 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:13,368 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:13,368 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,374 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:13,446 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 Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:13,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:13,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:13,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:13,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:13,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:13,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:13,453 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:13,488 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-28 02:58:13,489 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:13,502 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:13,502 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:13,502 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:13,502 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,538 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:13,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,580 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 [2020-11-28 02:58:13,580 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-11-28 02:58:13,602 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 13 states and 18 transitions. Complement of second has 5 states. [2020-11-28 02:58:13,604 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 [2020-11-28 02:58:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:13,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-28 02:58:13,605 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:13,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-28 02:58:13,605 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:13,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-28 02:58:13,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:13,606 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 18 transitions. [2020-11-28 02:58:13,607 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:13,607 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 13 transitions. [2020-11-28 02:58:13,607 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-28 02:58:13,607 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-28 02:58:13,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2020-11-28 02:58:13,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 02:58:13,608 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-11-28 02:58:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2020-11-28 02:58:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-11-28 02:58:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 02:58:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-11-28 02:58:13,609 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-28 02:58:13,611 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-28 02:58:13,611 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 02:58:13,611 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-11-28 02:58:13,612 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:13,612 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:13,613 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:13,613 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2020-11-28 02:58:13,614 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-28 02:58:13,614 INFO L794 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 118#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 119#L19-2 assume !(main_~y~0 < main_~x~0); 123#L19-3 main_~x~0 := main_~x~0 - 1; 120#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 121#L19-2 [2020-11-28 02:58:13,614 INFO L796 eck$LassoCheckResult]: Loop: 121#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 121#L19-2 [2020-11-28 02:58:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 29867642, now seen corresponding path program 2 times [2020-11-28 02:58:13,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:13,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244602877] [2020-11-28 02:58:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:13,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:13,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:13,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-28 02:58:13,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:13,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791188141] [2020-11-28 02:58:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:13,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:13,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:13,662 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 925896921, now seen corresponding path program 1 times [2020-11-28 02:58:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:13,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652744452] [2020-11-28 02:58:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652744452] [2020-11-28 02:58:13,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756540623] [2020-11-28 02:58:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 02:58:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:13,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-28 02:58:13,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68714057] [2020-11-28 02:58:13,858 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:13,859 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:13,859 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:13,859 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:13,859 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:13,859 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,859 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:13,859 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:13,859 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2020-11-28 02:58:13,859 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:13,859 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:13,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:13,932 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:13,932 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:13,941 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:13,944 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:13,944 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 /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:13,993 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:13,993 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:13,997 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:13,997 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:14,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:14,040 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:14,088 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:14,088 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 [2020-11-28 02:58:14,248 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:14,250 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:14,250 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:14,250 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:14,250 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:14,250 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:14,250 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:14,250 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:14,250 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:14,250 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2020-11-28 02:58:14,250 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:14,250 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:14,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:14,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:14,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:14,352 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:14,352 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:14,364 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 Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:14,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:14,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:14,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:14,365 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:14,369 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:14,369 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 02:58:14,373 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:14,401 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 [2020-11-28 02:58:14,402 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:14,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:14,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:14,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:14,416 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:14,416 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 02:58:14,421 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:14,447 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 [2020-11-28 02:58:14,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:14,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:14,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:14,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:14,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:14,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:14,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:14,455 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:14,468 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-28 02:58:14,468 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_268f9c70-f356-4f31-ae1a-bf0156bc5757/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:14,474 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:14,474 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:14,474 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:14,474 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:14,495 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:14,544 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 [2020-11-28 02:58:14,544 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:14,566 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2020-11-28 02:58:14,567 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 [2020-11-28 02:58:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:14,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-28 02:58:14,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:14,568 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 02:58:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:14,612 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:14,612 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:14,627 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2020-11-28 02:58:14,628 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 [2020-11-28 02:58:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:14,629 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-28 02:58:14,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:14,629 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 02:58:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:14,736 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:14,736 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:14,771 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 9 states and 11 transitions. Complement of second has 4 states. [2020-11-28 02:58:14,772 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 [2020-11-28 02:58:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-28 02:58:14,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 1 letters. [2020-11-28 02:58:14,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:14,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-28 02:58:14,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:14,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2020-11-28 02:58:14,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:14,774 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2020-11-28 02:58:14,774 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 02:58:14,774 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2020-11-28 02:58:14,774 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 02:58:14,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 02:58:14,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 02:58:14,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:14,775 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:14,775 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:14,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:14,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:14,779 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 7 states. [2020-11-28 02:58:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:14,783 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-28 02:58:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:14,784 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-28 02:58:14,784 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 02:58:14,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 02:58:14,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 02:58:14,784 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 02:58:14,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 02:58:14,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:14,785 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:14,785 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:14,785 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:14,785 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 02:58:14,785 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:58:14,785 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 02:58:14,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 02:58:14,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:58:14 BoogieIcfgContainer [2020-11-28 02:58:14,799 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 02:58:14,799 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:14,799 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:14,800 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:14,800 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11" (3/4) ... [2020-11-28 02:58:14,803 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 02:58:14,803 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:14,811 INFO L168 Benchmark]: Toolchain (without parser) took 3865.12 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 69.8 MB in the beginning and 99.2 MB in the end (delta: -29.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:14,812 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:14,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.67 ms. Allocated memory is still 107.0 MB. Free memory was 69.6 MB in the beginning and 83.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:14,814 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.36 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:14,815 INFO L168 Benchmark]: Boogie Preprocessor took 16.46 ms. Allocated memory is still 107.0 MB. Free memory was 82.4 MB in the beginning and 81.5 MB in the end (delta: 907.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:14,815 INFO L168 Benchmark]: RCFGBuilder took 232.45 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 73.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:14,819 INFO L168 Benchmark]: BuchiAutomizer took 3314.28 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 73.1 MB in the beginning and 99.2 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:14,819 INFO L168 Benchmark]: Witness Printer took 4.06 ms. Allocated memory is still 130.0 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:14,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.67 ms. Allocated memory is still 107.0 MB. Free memory was 69.6 MB in the beginning and 83.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.36 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.46 ms. Allocated memory is still 107.0 MB. Free memory was 82.4 MB in the beginning and 81.5 MB in the end (delta: 907.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 232.45 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 73.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3314.28 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 73.1 MB in the beginning and 99.2 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.06 ms. Allocated memory is still 130.0 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (1 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * y + x and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.2s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 6 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 21 SDslu, 6 SDs, 0 SdLazy, 39 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf111 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...